CVE-2026-113794: pypdf is a free and open-source pure-python PDF library

Routine

MEDIUM 6.0

CVE-2026-113794 is a medium-severity flaw (CVSS 6.0) affecting affected software. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

pypdf is a free and open-source pure-python PDF library. Prior to 6.20.0, an attacker can craft an incomplete PDF that ends inside a standard cross-reference table, causing pypdf to mishandle the unexpected end of file and enter an infinite loop. This issue is fixed in version 6.20.0.

Why this priority

No elevated risk signals yet

A fixed release or distro patch exists.

Risk facts

CVSS score	6.0 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	Passive
EPSS exploit chance	0.5% (top 61%)
CISA exploited list	No
Weakness	CWE-835
Published	2026-10-21
Last modified	2026-10-22

Publisher (CNA): GitHub, Inc.

Last updated 2026-10-22 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Timeline

2026-10-21Published CVE record published
2026-10-22 16:46 UTCUpdated Record last modified

Exact fixes by distribution

Python (pip) · pypdf · FIXED · 6.20.0 · vulnerable: < 6.20.0 · source

pip install --upgrade "pypdf>=6.20.0" pip show pypdf

Fedora 46 · diffoscope · FIXED · 335-1.fc46 · FEDORA-2026-e4c4cc0856 · source

sudo dnf upgrade --advisory=FEDORA-2026-e4c4cc0856

Debian 12 · pypdf · NO FIX YET

Debian 13 · pypdf · NO FIX YET

Debian 12 · pypdf2 · NO FIX YET

RHEL AI (RHEL AI) 3 · rhelai3/bootc-cuda-rhel9 · DEFERRED

RHEL AI (RHEL AI) 3 · rhelai3/bootc-gaudi-rhel9 · DEFERRED

RHEL AI (RHEL AI) 3 · rhelai3/bootc-rocm-rhel9 · DEFERRED

RHEL AI (RHEL AI) 3 · rhelai3/disk-image-cuda-rhel9 · DEFERRED

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2026-113794?

No fixed release is listed yet. Watch the vendor advisory and apply any mitigation shown on this page.

Is CVE-2026-113794 being exploited?

CVE-2026-113794 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2026-113794 affect?

CVE-2026-113794 affects affected software. Severity is medium (CVSS 6.0). pypdf is a free and open-source pure-python PDF library. Prior to 6.20.0, an attacker can craft an incomplete PDF that ends inside a standard cross-reference table, causing pypdf to mishandle the unexpected end of file and enter an infinite

How urgent is CVE-2026-113794?

Priority 31/100. No elevated risk signals yet.

Software pages

Python vulnerabilities

References

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