CVE-2026-7210

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Source
https://cve.org/CVERecord?id=CVE-2026-7210
Import Source
https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2026-7210.json
JSON Data
https://api.test.osv.dev/v1/vulns/CVE-2026-7210
Aliases
Downstream
Related
Published
2026-05-11T17:19:09.784Z
Modified
2026-08-22T08:04:19.502210Z
Severity
  • 6.3 (Medium) CVSS_V4 - CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N CVSS Calculator
Summary
The expat and elementtree parsers use insufficient entropy for XML hash-flooding protection
Details

xml.parsers.expat and xml.etree.ElementTree use insufficient entropy for Expat hash-flooding protection, which allows a crafted XML document to trigger hash flooding.\r\n\r\nFully mitigating this vulnerability requires both updating libexpat to 2.8.0 or later and applying this patch.

Database specific 
{
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/7xxx/CVE-2026-7210.json",
    "unresolved_ranges": [
        {
            "source": "AFFECTED_FIELD",
            "extracted_events": [
                {
                    "fixed": "3.11.16"
                },
                {
                    "introduced": "3.12.0"
                },
                {
                    "fixed": "3.12.14"
                },
                {
                    "introduced": "3.13.0"
                },
                {
                    "fixed": "3.13.14"
                },
                {
                    "introduced": "3.14.0"
                },
                {
                    "fixed": "3.14.6"
                },
                {
                    "introduced": "3.15.0a1"
                },
                {
                    "fixed": "3.15.0b2"
                }
            ]
        }
    ],
    "cwe_ids": [
        "CWE-331"
    ],
    "cna_assigner": "PSF"
}
References

Affected packages

Git / github.com/python/cpython

Affected ranges

Type
GIT
Repo
https://github.com/python/cpython
Events
Introduced
0 Unknown introduced commit / All previous commits are affected
Fixed
24b8f12544468e4cedf5bfbe25442fcd495391e4
Fixed
3573b3b1ecbd99030a0b18658e1bfece771b2566
Fixed
cbaecf9f16da611a646d507c1cbca265c588fc56
Fixed
e37df2a6a71d6538698e2d3188a7c345b827640b
Fixed
ea70712d1a8508e14e9677d44f838dab04dc0286
Fixed
eeea765cb9d8f1fc3d8918b272ac3c477983f27a
Fixed
fc9b11ff49cbc82e6f917d07a61517a2b5f3145f
Database specific
Show details 
{
    "source": "REFERENCES"
}

Affected versions

v0.*
v0.9.8
v0.9.9
v1.*
v1.0.1
v1.0.2
v1.1
v1.1.1
v1.2
v1.2b1
v1.2b2
v1.2b3
v1.2b4
v1.3
v1.3b1
v1.4
v1.4b1
v1.4b2
v1.4b3
v1.5
v1.5.1
v1.5.2
v1.5.2a1
v1.5.2a2
v1.5.2b1
v1.5.2b2
v1.5.2c1
v1.5a1
v1.5a2
v1.5a3
v1.5a4
v1.5b1
v1.5b2
v1.6a1
v1.6a2
v2.*
v2.0
v2.0b1
v2.0b2
v2.0c1
v2.1
v2.1a1
v2.1a2
v2.1b1
v2.1b2
v2.1c1
v2.1c2
v2.2a3
v2.3c1
v2.3c2
v2.4
v2.4a1
v2.4a2
v2.4a3
v2.4b1
v2.4b2
v2.4c1
v3.*
v3.0a1
v3.0a2
v3.0a3
v3.0a4
v3.0a5
v3.0b1
v3.0b2
v3.0b3
v3.0rc1
v3.0rc2
v3.0rc3
v3.1
v3.10.0a1
v3.10.0a7
v3.10.0b1
v3.10.0b2
v3.10.0b3
v3.10.0b4
v3.10.0rc1
v3.10.0rc2
v3.10.1
v3.10.10
v3.10.11
v3.10.12
v3.10.13
v3.10.14
v3.10.15
v3.10.16
v3.10.17
v3.10.18
v3.10.19
v3.10.2
v3.10.20
v3.10.21
v3.10.3
v3.10.4
v3.10.5
v3.10.6
v3.10.7
v3.10.8
v3.10.9
v3.11.0a3
v3.11.0a4
v3.11.0a5
v3.11.0a6
v3.11.0a7
v3.11.0b1
v3.11.0b2
v3.11.0b3
v3.11.0b4
v3.11.0b5
v3.11.0rc1
v3.11.0rc2
v3.11.1
v3.11.10
v3.11.11
v3.11.12
v3.11.13
v3.11.14
v3.11.15
v3.11.2
v3.11.3
v3.11.4
v3.11.5
v3.11.6
v3.11.7
v3.11.8
v3.11.9
v3.12.0
v3.12.0a1
v3.12.0a2
v3.12.0a3
v3.12.0a4
v3.12.0a5
v3.12.0a6
v3.12.0a7
v3.12.0b1
v3.12.0b2
v3.12.0b3
v3.12.0b4
v3.12.0rc1
v3.12.0rc2
v3.12.0rc3
v3.12.1
v3.12.10
v3.12.11
v3.12.12
v3.12.13
v3.12.2
v3.12.3
v3.12.4
v3.12.5
v3.12.6
v3.12.7
v3.12.8
v3.12.9
v3.13.0
v3.13.0a1
v3.13.0a2
v3.13.0a3
v3.13.0a4
v3.13.0a5
v3.13.0a6
v3.13.0b1
v3.13.0b2
v3.13.0b3
v3.13.0b4
v3.13.0rc1
v3.13.0rc2
v3.13.0rc3
v3.13.1
v3.13.10
v3.13.11
v3.13.12
v3.13.13
v3.13.2
v3.13.3
v3.13.4
v3.13.5
v3.13.6
v3.13.7
v3.13.8
v3.14.0
v3.14.0a1
v3.14.0a2
v3.14.0a3
v3.14.0a4
v3.14.0a5
v3.14.0a6
v3.14.0a7
v3.14.0b1
v3.14.0b2
v3.14.0b3
v3.14.0b4
v3.14.0rc1
v3.14.0rc2
v3.14.0rc3
v3.14.1
v3.14.2
v3.14.3
v3.14.4
v3.14.5
v3.14.5rc1
v3.15.0a1
v3.15.0a2
v3.15.0a3
v3.15.0a4
v3.15.0a5
v3.15.0a6
v3.15.0a7
v3.15.0a8
v3.15.0b1
v3.1a1
v3.1a2
v3.1b1
v3.1rc1
v3.1rc2
v3.2a1
v3.2a2
v3.2a3
v3.2a4
v3.2b1
v3.2b2
v3.2rc1
v3.2rc2
v3.2rc3
v3.3.0a2
v3.3.0a3
v3.3.0a4
v3.3.0b1
v3.3.0b2
v3.3.0rc1
v3.3.0rc2
v3.3.0rc3
v3.4.0a1
v3.4.0a2
v3.4.0a3
v3.4.0a4
v3.4.0b1
v3.4.0b2
v3.4.0b3
v3.5.0a1
v3.5.0a2
v3.5.0a3
v3.5.0a4
v3.5.0b1
v3.6.0a3
v3.6.0b1
v3.7.0a2
v3.9.0a2

Database specific

vanir_signatures 
[
    {
        "digest": {
            "line_hashes": [
                "3814617656226460057339031382146484273",
                "79948655394174729998410572687005397291",
                "269765094616619105105745067465953345178",
                "52491913065894657274224157621680217981",
                "231686096489310269328649624848028668734",
                "9764412166215748283159686165100133222",
                "143444819121599425158698232384205236527"
            ],
            "threshold": 0.9
        },
        "source": "https://github.com/python/cpython/commit/ea70712d1a8508e14e9677d44f838dab04dc0286",
        "id": "CVE-2026-7210-130d6059",
        "deprecated": false,
        "signature_type": "Line",
        "target": {
            "file": "Include/pyhash.h"
        },
        "signature_version": "v1"
    },
    {
        "digest": {
            "line_hashes": [
                "282054346468100250562588928679692945206",
                "241745087690371911974619499003941746146"
            ],
            "threshold": 0.9
        },
        "source": "https://github.com/python/cpython/commit/eeea765cb9d8f1fc3d8918b272ac3c477983f27a",
        "id": "CVE-2026-7210-13eab482",
        "deprecated": false,
        "signature_type": "Line",
        "target": {
            "file": "Include/pyexpat.h"
        },
        "signature_version": "v1"
    },
    {
        "digest": {
            "length": 2990.0,
            "function_hash": "100837677078581469210422368217459004578"
        },
        "source": "https://github.com/python/cpython/commit/eeea765cb9d8f1fc3d8918b272ac3c477983f27a",
        "id": "CVE-2026-7210-17d28da6",
        "deprecated": false,
        "signature_type": "Function",
        "target": {
            "file": "Modules/_elementtree.c",
            "function": "_elementtree_XMLParser___init___impl"
        },
        "signature_version": "v1"
    },
    {
        "digest": {
            "line_hashes": [
                "3814617656226460057339031382146484273",
                "79948655394174729998410572687005397291",
                "269765094616619105105745067465953345178",
                "52491913065894657274224157621680217981",
                "231686096489310269328649624848028668734",
                "9764412166215748283159686165100133222",
                "143444819121599425158698232384205236527"
            ],
            "threshold": 0.9
        },
        "source": "https://github.com/python/cpython/commit/e37df2a6a71d6538698e2d3188a7c345b827640b",
        "id": "CVE-2026-7210-2018d730",
        "deprecated": false,
        "signature_type": "Line",
        "target": {
            "file": "Include/pyhash.h"
        },
        "signature_version": "v1"
    },
    {
        "digest": {
            "line_hashes": [
                "200809790425200767353365779645814661145",
                "338571468881071273146244236238519698763",
                "158710132041207750309477001233984228072",
                "52491913065894657274224157621680217981",
                "231686096489310269328649624848028668734",
                "9764412166215748283159686165100133222",
                "143444819121599425158698232384205236527"
            ],
            "threshold": 0.9
        },
        "source": "https://github.com/python/cpython/commit/3573b3b1ecbd99030a0b18658e1bfece771b2566",
        "id": "CVE-2026-7210-2da9aa18",
        "deprecated": false,
        "signature_type": "Line",
        "target": {
            "file": "Include/internal/pycore_pyhash.h"
        },
        "signature_version": "v1"
    },
    {
        "digest": {
            "length": 2990.0,
            "function_hash": "100837677078581469210422368217459004578"
        },
        "source": "https://github.com/python/cpython/commit/24b8f12544468e4cedf5bfbe25442fcd495391e4",
        "id": "CVE-2026-7210-40d083c4",
        "deprecated": false,
        "signature_type": "Function",
        "target": {
            "file": "Modules/_elementtree.c",
            "function": "_elementtree_XMLParser___init___impl"
        },
        "signature_version": "v1"
    },
    {
        "digest": {
            "line_hashes": [
                "235540386729885170438800261319618750470",
                "172128923270737101073236902300203403709",
                "307193223577402528095909077030823192072",
                "52491913065894657274224157621680217981",
                "231686096489310269328649624848028668734",
                "9764412166215748283159686165100133222",
                "143444819121599425158698232384205236527"
            ],
            "threshold": 0.9
        },
        "source": "https://github.com/python/cpython/commit/fc9b11ff49cbc82e6f917d07a61517a2b5f3145f",
        "id": "CVE-2026-7210-426b5dbb",
        "deprecated": false,
        "signature_type": "Line",
        "target": {
            "file": "Include/internal/pycore_pyhash.h"
        },
        "signature_version": "v1"
    },
    {
        "digest": {
            "line_hashes": [
                "331466583639241250362361799100269972853",
                "268201616245445465644069845275318051766",
                "162056430873582821825539244461100327069",
                "205189259492710410910413780725664212883"
            ],
            "threshold": 0.9
        },
        "source": "https://github.com/python/cpython/commit/3573b3b1ecbd99030a0b18658e1bfece771b2566",
        "id": "CVE-2026-7210-45eda978",
        "deprecated": false,
        "signature_type": "Line",
        "target": {
            "file": "Modules/_elementtree.c"
        },
        "signature_version": "v1"
    },
    {
        "digest": {
            "line_hashes": [
                "282054346468100250562588928679692945206",
                "241745087690371911974619499003941746146"
            ],
            "threshold": 0.9
        },
        "source": "https://github.com/python/cpython/commit/e37df2a6a71d6538698e2d3188a7c345b827640b",
        "id": "CVE-2026-7210-54b01c68",
        "deprecated": false,
        "signature_type": "Line",
        "target": {
            "file": "Include/pyexpat.h"
        },
        "signature_version": "v1"
    },
    {
        "digest": {
            "line_hashes": [
                "282054346468100250562588928679692945206",
                "241745087690371911974619499003941746146"
            ],
            "threshold": 0.9
        },
        "source": "https://github.com/python/cpython/commit/3573b3b1ecbd99030a0b18658e1bfece771b2566",
        "id": "CVE-2026-7210-588d9fcd",
        "deprecated": false,
        "signature_type": "Line",
        "target": {
            "file": "Include/pyexpat.h"
        },
        "signature_version": "v1"
    },
    {
        "digest": {
            "length": 2876.0,
            "function_hash": "60776478727970771450073440320269809254"
        },
        "source": "https://github.com/python/cpython/commit/cbaecf9f16da611a646d507c1cbca265c588fc56",
        "id": "CVE-2026-7210-5cea040d",
        "deprecated": false,
        "signature_type": "Function",
        "target": {
            "file": "Modules/_elementtree.c",
            "function": "_elementtree_XMLParser___init___impl"
        },
        "signature_version": "v1"
    },
    {
        "digest": {
            "length": 2990.0,
            "function_hash": "100837677078581469210422368217459004578"
        },
        "source": "https://github.com/python/cpython/commit/3573b3b1ecbd99030a0b18658e1bfece771b2566",
        "id": "CVE-2026-7210-5e07327e",
        "deprecated": false,
        "signature_type": "Function",
        "target": {
            "file": "Modules/_elementtree.c",
            "function": "_elementtree_XMLParser___init___impl"
        },
        "signature_version": "v1"
    },
    {
        "digest": {
            "line_hashes": [
                "139223617181001955104759715207834526056",
                "228426983551421850305035845652555746849",
                "157063243252423991660603289123046198519",
                "126873213760035561109826808365762501927",
                "156149891684222126871834519137026026373",
                "285177093540853341381039225061555051327",
                "123367630945934901850591089140463774569",
                "203907525583600214249590754539200999315"
            ],
            "threshold": 0.9
        },
        "source": "https://github.com/python/cpython/commit/24b8f12544468e4cedf5bfbe25442fcd495391e4",
        "id": "CVE-2026-7210-6078bfbf",
        "deprecated": false,
        "signature_type": "Line",
        "target": {
            "file": "Modules/pyexpat.c"
        },
        "signature_version": "v1"
    },
    {
        "digest": {
            "length": 2990.0,
            "function_hash": "100837677078581469210422368217459004578"
        },
        "source": "https://github.com/python/cpython/commit/e37df2a6a71d6538698e2d3188a7c345b827640b",
        "id": "CVE-2026-7210-612a5525",
        "deprecated": false,
        "signature_type": "Function",
        "target": {
            "file": "Modules/_elementtree.c",
            "function": "_elementtree_XMLParser___init___impl"
        },
        "signature_version": "v1"
    },
    {
        "digest": {
            "line_hashes": [
                "282054346468100250562588928679692945206",
                "241745087690371911974619499003941746146"
            ],
            "threshold": 0.9
        },
        "source": "https://github.com/python/cpython/commit/cbaecf9f16da611a646d507c1cbca265c588fc56",
        "id": "CVE-2026-7210-62753ffb",
        "deprecated": false,
        "signature_type": "Line",
        "target": {
            "file": "Include/pyexpat.h"
        },
        "signature_version": "v1"
    },
    {
        "digest": {
            "line_hashes": [
                "139223617181001955104759715207834526056",
                "228426983551421850305035845652555746849",
                "157063243252423991660603289123046198519",
                "126873213760035561109826808365762501927",
                "314965965601410178803286682466095838710",
                "249304516044969601131940486954398202197",
                "122825007783695525601806510176911638576",
                "71504830788034590546234969904776556735"
            ],
            "threshold": 0.9
        },
        "source": "https://github.com/python/cpython/commit/ea70712d1a8508e14e9677d44f838dab04dc0286",
        "id": "CVE-2026-7210-6da1a6bc",
        "deprecated": false,
        "signature_type": "Line",
        "target": {
            "file": "Modules/pyexpat.c"
        },
        "signature_version": "v1"
    },
    {
        "digest": {
            "line_hashes": [
                "282054346468100250562588928679692945206",
                "241745087690371911974619499003941746146"
            ],
            "threshold": 0.9
        },
        "source": "https://github.com/python/cpython/commit/24b8f12544468e4cedf5bfbe25442fcd495391e4",
        "id": "CVE-2026-7210-6f2ef549",
        "deprecated": false,
        "signature_type": "Line",
        "target": {
            "file": "Include/pyexpat.h"
        },
        "signature_version": "v1"
    },
    {
        "digest": {
            "length": 1341.0,
            "function_hash": "282746458073661659926039957721266319977"
        },
        "source": "https://github.com/python/cpython/commit/3573b3b1ecbd99030a0b18658e1bfece771b2566",
        "id": "CVE-2026-7210-6f360086",
        "deprecated": false,
        "signature_type": "Function",
        "target": {
            "file": "Modules/pyexpat.c",
            "function": "newxmlparseobject"
        },
        "signature_version": "v1"
    },
    {
        "digest": {
            "length": 1356.0,
            "function_hash": "170187021853751598684650737231658061400"
        },
        "source": "https://github.com/python/cpython/commit/cbaecf9f16da611a646d507c1cbca265c588fc56",
        "id": "CVE-2026-7210-6ff3381a",
        "deprecated": false,
        "signature_type": "Function",
        "target": {
            "file": "Modules/pyexpat.c",
            "function": "newxmlparseobject"
        },
        "signature_version": "v1"
    },
    {
        "digest": {
            "line_hashes": [
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                "228426983551421850305035845652555746849",
                "157063243252423991660603289123046198519",
                "126873213760035561109826808365762501927",
                "314965965601410178803286682466095838710",
                "249304516044969601131940486954398202197",
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            "threshold": 0.9
        },
        "source": "https://github.com/python/cpython/commit/cbaecf9f16da611a646d507c1cbca265c588fc56",
        "id": "CVE-2026-7210-73ebef02",
        "deprecated": false,
        "signature_type": "Line",
        "target": {
            "file": "Modules/pyexpat.c"
        },
        "signature_version": "v1"
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    {
        "digest": {
            "length": 2876.0,
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vanir_signatures_modified 
"2026-08-22T08:04:19Z"
source 
"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2026-7210.json"