🛡️ CVE-2026-54530 — pypdf

🟡 CVSS 5.5 — Medium ✅ No Known Exploit CWE-835 OSV
5.5
CVSS Score
0 Low4 Medium7 High9 Critical10

Description

pypdf: Possible infinite loop when retrieving fonts for layout-mode text extraction

Impact

An attacker who uses this vulnerability can craft a PDF which leads to an infinite loop. This requires extracting the text in layout mode.

Patches

This has been fixed in [pypdf==6.13.0](https://github.com/py-pdf/pypdf/releases/tag/6.13.0).

Workarounds

If you cannot upgrade yet, consider applying the changes from PR [#3830](https://github.com/py-pdf/pypdf/pull/3830).

How this vulnerability can be exploited

This issue can be reached with local access to the system, attack complexity is low, an attacker needs no privileges on the target. No user interaction is required. Rated impact: confidentiality none, integrity none, availability high.

Weakness class

CVE-2026-54530 is classified as CWE-835: Infinite Loop. A loop condition can never become false for some inputs, hanging the process.

Affected software

CVE-2026-54530 is recorded against 1 package.

  • pypdf (fixed in 6.13.0)

Timeline and source

Published on 16 June 2026 and last revised on 13 July 2026. No public exploit is currently recorded for this entry. A vendor advisory or fix has been published. Record sourced from OSV.

References

github.com (Web)
github.com (Web)
github.com (Package)
github.com (Web)

Details

Severity MEDIUM
CVSS Score 5.5
CVSS Vector CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
CWE CWE-835
Public Exploit ✅ No
Source OSV
Published 2026-06-16
Updated 2026-08-12
Modified 2026-07-13

Affected Packages

Software From version Fixed in
pypdf — 6.13.0

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