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CVE-2026-22691

MEDIUM

5.3

Descricao

pypdf is a free and open-source pure-python PDF library. Prior to version 6.6.0, pypdf has possible long runtimes for malformed startxref. An attacker who uses this vulnerability can craft a PDF which leads to possibly long runtimes for invalid startxref entries. When rebuilding the cross-reference table, PDF files with lots of whitespace characters become problematic. Only the non-strict reading mode is affected. Only the non-strict reading mode is affected. This issue has been patched in version 6.6.0.

Detalhes CVE

Pontuacao CVSS v3.15.3

SeveridadeMEDIUM

Vetor CVSSCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

Vetor de ataqueNETWORK

ComplexidadeLOW

Privilegios necessariosNONE

Interacao do usuarioNONE

Publicado1/10/2026

Ultima modificacao1/22/2026

Fontenvd

Avistamentos honeypot0

Produtos afetados

pypdf_project:pypdf

Fraquezas (CWE)

CWE-400CWE-1333

Referencias

https://github.com/py-pdf/pypdf/commit/294165726b646bb7799be1cc787f593f2fdbcf45(security-advisories@github.com)

https://github.com/py-pdf/pypdf/pull/3594(security-advisories@github.com)

https://github.com/py-pdf/pypdf/releases/tag/6.6.0(security-advisories@github.com)

https://github.com/py-pdf/pypdf/security/advisories/GHSA-4f6g-68pf-7vhv(security-advisories@github.com)

Correlacoes IOC

Sem correlacoes registradas

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