CVE-2025-4516

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Source
https://cve.org/CVERecord?id=CVE-2025-4516
Import Source
https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2025-4516.json
JSON Data
https://api.test.osv.dev/v1/vulns/CVE-2025-4516
Aliases
Downstream
Related
Published
2025-05-15T13:29:20.126Z
Modified
2026-06-15T12:23:28.527966106Z
Severity
  • 5.9 (Medium) CVSS_V4 - CVSS:4.0/AV:L/AC:H/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N CVSS Calculator
Summary
Use-after-free in "unicode_escape" decoder with error handler
Details

There is an issue in CPython when using bytes.decode("unicode_escape", error="ignore|replace"). If you are not using the "unicode_escape" encoding or an error handler your usage is not affected. To work-around this issue you may stop using the error= handler and instead wrap the bytes.decode() call in a try-except catching the DecodeError.

Database specific 
{
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/4xxx/CVE-2025-4516.json",
    "cna_assigner": "PSF",
    "cwe_ids": [
        "CWE-416"
    ]
}
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
Introduced
deaf509e8fc6e0363bd6f26d52ad42f976ec42f2
Introduced
0fb18b02c8ad56299d6a2910be0bab8ad601ef24
Introduced
60403a5409ff2c3f3b07dd2ca91a7a3e096839c7
Introduced
b092705907c758d4f9742028652c9802f9f03dd3
Fixed
88663ef89ba3576df02cc818c653f91c7d5dd023
Fixed
498b971ea3673012a1d4b21860b229d55fc6e575
Fixed
55fee9cf216abe4ec0d1139f94b1930fbd0c7644
Fixed
8a526ec7cbea8fafc9dae4b3dd6371906b9be342
Fixed
12d3f883ae8aa6297a575511b14fa1e82248427d
Fixed
4398b788ffc1f954a2c552da285477d42a571292
Fixed
6279eb8c076d89d3739a6edb393e43c7929b429d
Fixed
69b4387f78f413e8c47572a85b3478c47eba8142
Fixed
73b3040f592436385007918887b7e2132aa8431f
Fixed
8d35fd1b34935221aff23a1ab69a429dd156be77
Fixed
9f69a58623bd01349a18ba0c7a9cb1dad6a51e8e
Fixed
ab9893c40609935e0d40a6d2a7307ea51aec598b
Database specific 
{
    "extracted_events": [
        {
            "introduced": "0"
        },
        {
            "fixed": "3.10.18"
        },
        {
            "introduced": "3.11.0"
        },
        {
            "fixed": "3.11.13"
        },
        {
            "introduced": "3.12.0"
        },
        {
            "fixed": "3.12.11"
        },
        {
            "introduced": "3.13.0"
        },
        {
            "fixed": "3.13.4"
        },
        {
            "introduced": "3.14.0a1"
        },
        {
            "fixed": "3.14.0b2"
        }
    ],
    "source": [
        "AFFECTED_FIELD",
        "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
v3.10.2
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
v3.11.2
v3.11.3
v3.11.4
v3.11.5
v3.11.6
v3.11.7
v3.11.8
v3.11.9
v3.12.0
v3.12.1
v3.12.10
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
v3.13.1
v3.13.2
v3.13.3
v3.14.0b1
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
v3.9.0b1
v3.9.0b3
v3.9.0b5
v3.9.11
v3.9.12
v3.9.13
v3.9.14
v3.9.15
v3.9.16
v3.9.17
v3.9.18
v3.9.19
v3.9.2
v3.9.20
v3.9.21
v3.9.22
v3.9.2rc1
v3.9.5
v3.9.6
v3.9.7
v3.9.8
v3.9.9

Database specific

source 
"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2025-4516.json"