CVE-2026-27888

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Source
https://cve.org/CVERecord?id=CVE-2026-27888
Import Source
https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2026-27888.json
JSON Data
https://api.test.osv.dev/v1/vulns/CVE-2026-27888
Aliases
Downstream
CLSA (1)
DEBIAN (1)
openSUSE (2)
ROOT (1)
UBUNTU (1)
Related
Published
2026-02-26T00:42:00Z
Modified
2026-10-16T02:58:42Z
Severity
  • 6.6 (Medium) CVSS_V4 - CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U CVSS Calculator
Summary
pypdf: Manipulated FlateDecode XFA streams can exhaust RAM
Details

pypdf is a free and open-source pure-python PDF library. Prior to 6.7.3, an attacker who uses this vulnerability can craft a PDF which leads to the RAM being exhausted. This requires accessing the xfa property of a reader or writer and the corresponding stream being compressed using /FlateDecode. This has been fixed in pypdf 6.7.3. As a workaround, apply the patch manually.

Database specific 
{
    "cna_assigner": "GitHub_M",
    "cwe_ids": [
        "CWE-400"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/27xxx/CVE-2026-27888.json"
}
References

Affected packages

Git / github.com/py-pdf/pypdf

Affected ranges

Type
GIT
Repo
https://github.com/py-pdf/pypdf
Events
Introduced
0 Unknown introduced commit / All previous commits are affected
Fixed
05e6d3c03deaec6b16b53825465537ac9e7a1a14
Fixed
7a4c8246ed48d9d328fb596942271da47b6d109c
Database specific
Show details 
{
    "extracted_events": [
        {
            "cpe": "cpe:2.3:a:pypdf_project:pypdf:*:*:*:*:*:*:*:*",
            "range": [
                {
                    "introduced": "0"
                },
                {
                    "fixed": "6.7.3"
                }
            ],
            "source": "CPE_RANGE"
        },
        {
            "range": [
                {
                    "fixed": "7a4c8246ed48d9d328fb596942271da47b6d109c"
                }
            ],
            "source": "REFERENCES_COMMIT"
        },
        {
            "original_tag": "6.7.3",
            "range": [
                {
                    "fixed": "05e6d3c03deaec6b16b53825465537ac9e7a1a14"
                }
            ],
            "source": "REFERENCES_TAG"
        }
    ]
}

Affected versions

1.*
1.26.0
1.27.0
1.27.1
1.27.10
1.27.11
1.27.12
1.27.2
1.27.3
1.27.4
1.27.5
1.27.6
1.27.7
1.27.8
1.27.9
1.28.0
1.28.1
1.28.2
2.*
2.0.0
2.1.0
2.1.1
2.10.0
2.10.1
2.10.2
2.10.3
2.10.4
2.10.5
2.10.6
2.10.7
2.10.8
2.10.9
2.11.0
2.11.1
2.11.2
2.12.0
2.12.1
2.2.0
2.2.1
2.3.0
2.3.1
2.4.0
2.4.1
2.4.2
2.5.0
2.6.0
2.7.0
2.8.0
2.8.1
2.9.0
3.*
3.0.0
3.1.0
3.10.0
3.11.0
3.11.1
3.12.0
3.12.1
3.12.2
3.13.0
3.14.0
3.15.0
3.15.1
3.15.2
3.15.3
3.15.4
3.15.5
3.16.0
3.16.1
3.16.2
3.16.3
3.16.4
3.17.0
3.17.1
3.17.2
3.17.3
3.17.4
3.2.0
3.2.1
3.3.0
3.4.0
3.4.1
3.5.0
3.5.1
3.5.2
3.6.0
3.7.0
3.7.1
3.8.0
3.8.1
3.9.0
3.9.1
4.*
4.0.0
4.0.1
4.0.2
4.1.0
4.2.0
4.3.0
4.3.1
5.*
5.0.0
5.0.1
5.1.0
5.2.0
5.3.0
5.3.1
5.4.0
5.5.0
5.6.0
5.6.1
5.7.0
5.8.0
5.9.0
6.*
6.0.0
6.1.0
6.1.1
6.1.2
6.1.3
6.2.0
6.3.0
6.4.0
6.4.1
6.4.2
6.5.0
6.6.0
6.6.1
6.6.2
6.7.0
6.7.1
6.7.2
v1.*
v1.17
v1.18
v1.19
v1.20
v1.21
v1.22
v1.23
v1.24
v1.25
v1.25.1

Database specific

source 
"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2026-27888.json"