Fluid Attacks Database

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
debian 13	pypdf	=5.4.0-1 \|\| =6.9.0-1 \|\| =6.9.2-1 \|\| =6.9.2-2	-
debian 14	pypdf	=5.4.0-1 \|\| =6.9.0-1 \|\| =6.9.2-1 \|\| =6.9.2-2	-
debian 12	pypdf2	=2.12.1-3 \|\| =2.12.1-3+deb12u1 \|\| =2.12.1-4	-
debian 12	pypdf	=3.17.4-1 \|\| =3.4.1-1 \|\| =3.4.1-1+deb12u1 \|\| =4.0.0-1 \|\| =4.0.0-1~exp1 \|\| =4.0.1-1 \|\| =4.0.2-1 \|\| =4.1.0-1 \|\| =4.2.0-1 \|\| =4.3.1-1 \|\| =5.4.0-1 \|\| =6.9.0-1 \|\| =6.9.2-1 \|\| =6.9.2-2	-
pypi	pypdf	>=0 <6.16.0	6.16.0

Aliases

1. CVE-2026-843092. NVD-2026-843093. OSV-DEBIAN-2026-843094. OSV-2026-843095. GHSA-jp53-mhqp-8xcg6. GCVE-2026-843097. SECURITY-TRACKER-CVE-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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