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Improper resource allocation In pypdf

Description

pypdf: Possible infinite loop for TreeObject.insert_child

Impact

An attacker who uses this vulnerability can craft a PDF which leads to an infinite loop. This requires a (usually writing) code path where TreeObject.insert_child is involved.

Patches

This has been fixed in pypdf==6.16.0.

Workarounds

If you cannot upgrade yet, consider applying the changes from PR #3964.

Mitigation

Update Impact

Minimal update. May introduce new vulnerabilities or breaking changes.

Ecosystem
Component
Affected version
Patched versions

Aliases

1. CVE-2026-843092. NVD-2026-843093. OSV-2026-843094. GHSA-jp53-mhqp-8xcg5. GCVE-2026-84309

References

1. https://github.com/py-pdf/pypdf/security/advisories/GHSA-jp53-mhqp-8xcg2. https://github.com/py-pdf/pypdf/pull/39643. https://github.com/py-pdf/pypdf/commit/c9ba557d565d57c53a0b3a0be06c0a4c29b0559b4. https://github.com/py-pdf/pypdf/releases/tag/6.16.0

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