🛡️ CVE-2026-48155 — pypdf

🟡 CVSS 5.5 — Medium ✅ No Known Exploit CWE-400 NVD
5.5
CVSS Score
0 Low4 Medium7 High9 Critical10

Description

pypdf: Possible large memory usage for large offsets for layout mode text

Impact

An attacker who uses this vulnerability can craft a PDF which leads to large memory usage. This requires extracting text in layout mode with large character offsets.

Patches

This has been fixed in [pypdf==6.12.0](https://github.com/py-pdf/pypdf/releases/tag/6.12.0).

Workarounds

If developers are unable to immediately upgrade, they should consider applying the changes from PR [#3790](https://github.com/py-pdf/pypdf/pull/3790).

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. A user must be tricked into taking some action. Rated impact: confidentiality none, integrity none, availability low.

Weakness class

CVE-2026-48155 is classified as CWE-400: Uncontrolled Resource Consumption. A request can consume memory, CPU or storage without limit, exhausting capacity for everyone else.

Affected software

CVE-2026-48155 is recorded against 2 packages.

  • pypdf (fixed in 6.12.0)
  • unknown

Timeline and source

Published on 12 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 NVD.

References

github.com (Web)
nvd.nist.gov (Advisory)
github.com (Web)
github.com (Package)
github.com (Web)

CVE-2026-48155 on other distributions

Each distribution ships its own build and its own fixed version. Pick the one you run:

Details

Severity MEDIUM
CVSS Score 5.5
CVSS Vector CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N
CWE CWE-400
Public Exploit ✅ No
Source NVD
Published 2026-06-12
Updated 2026-08-12
Modified 2026-07-13

Affected Packages

Software From version Fixed in
pypdf — 6.12.0
unknown — —

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