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Database

Improper resource allocation In pypdf

Description

pypdf: Possible long runtimes/large memory usage when extracting XForm objects

Impact

An attacker who uses this vulnerability can craft a PDF which leads to long runtimes and large memory consumption. This requires extracting the text of a page with lots of XForm objects, where some of them might be re-used.

Patches

This has been fixed in pypdf==6.16.1.

Workarounds

If you cannot upgrade yet, consider applying the changes from PR #3966.

Mitigation

Update Impact

Minimal update. May introduce new vulnerabilities or breaking changes.

Ecosystem
Component
Affected version
Patched versions

Aliases

1. CVE-2026-843112. NVD-2026-843113. OSV-2026-843114. GHSA-763m-79hh-57f25. GCVE-2026-84311

References

1. https://github.com/py-pdf/pypdf/security/advisories/GHSA-763m-79hh-57f22. https://github.com/py-pdf/pypdf/pull/39663. https://github.com/py-pdf/pypdf/commit/d91ab705fd81ed1a9cec175c6958600dea1a49424. https://github.com/py-pdf/pypdf/releases/tag/6.16.1

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