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OpenAdvisories
Low · 1.2 CVE-2026-27628 EUVD-2026-8601GHSA-2rw7-x74f-jg35PYSEC-2026-3005

pypdf has a possible infinite loop when loading circular /Prev entries in cross-reference streams

Published Feb 25, 2026 · Updated Feb 27, 2026 · Assigned by GitHub_M

Description

pypdf is a free and open-source pure-python PDF library. Prior to 6.7.2, an attacker who uses this vulnerability can craft a PDF which leads to an infinite loop. This requires reading the file. This has been fixed in pypdf 6.7.2. As a workaround, one may apply the patch manually.

Affected products

VendorProductAffectedFixed
py-pdf pypdf < 6.7.2 —

Fixed in Linux distributions

Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.

ReleasePackageFixed inAdvisory
Debian 14 pypdf 6.9.0-1 —
Debian 13 pypdf No fix yet —
Debian 12 pypdf +1 No fix yet —
ReleasePackageFixed inAdvisory
Ubuntu 26.10 pypdf No fix yet —
Ubuntu 26.04 LTS pypdf No fix yet —
Ubuntu 25.10 pypdf No fix yet —
Ubuntu 24.04 LTS pypdf +1 No fix yet —
Ubuntu 22.04 LTS pypdf2 No fix yet —
Show 3 more (older releases, extended support, other products)
ReleasePackageFixed inAdvisory
Ubuntu 20.04 LTS pypdf2 No fix yet —
Ubuntu Pro 18.04 LTS pypdf2 No fix yet —
Ubuntu Pro 16.04 LTS pypdf2 No fix yet —
ReleasePackageFixed inAdvisory
openSUSE Tumbleweed python-PyPDF2 2.11.1-5.1 openSUSE-SU-2026:10284-1

Wolfi

ReleasePackageFixed inAdvisory
Wolfi rolling open-webui 0.8.5-r0 —

Affected packages

EcosystemPackageAffectedFixedRecord
PyPI pypdf < 6.7.2 6.7.2 GHSA-2rw7-x74f-jg35

Advisories 2

References