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CVE-2026-41314

pypdf: Manipulated FlateDecode image dimensions can exhaust RAM

Published: Apr 22, 2026Updated: Apr 27, 2026 Sources: CVE List NVDCWE-789
6.5MEDIUM
NVD MITRE
EPSS Score
0.2%
Top 86.6%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Patch Available
Self-Check
OpenVAS

Description

pypdf is a free and open-source pure-python PDF library. An attacker who uses a vulnerability present in versions prior to 6.10.2 can craft a PDF which leads to the RAM being exhausted. This requires accessing an image using `/FlateDecode` with large size values. This has been fixed in pypdf 6.10.2. As a workaround, one may apply the changes from the patch manually.

No summary for this CVE yet.

CVSS Vector Breakdown

AV:NAC:LPR:NUI:RS:UC:NI:NA:H
Exploitability
AV:NAttack Vector
Network
AC:LAttack Complexity
Low
PR:NPrivileges Required
None
UI:RUser Interaction
Required
Scope
S:UScope
Unchanged
Impact
C:NConfidentiality
None
I:NIntegrity
None
A:HAvailability
High
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Weaknesses

CWE-789

Affected Products

py-pdf
package-ecosystemaka pypdf, pypdf2
pypdfOn-prem
OSS Libraries / pypi
pypdf project
oss-project
pypdfLibrary
OSS Libraries / generic-library

Exploitability

Official Patch Available
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References

https://github.com/py-pdf/pypdf/security/advisories/GHSA-x284-j5p8-9c5p
github.com
https://github.com/py-pdf/pypdf/pull/3734
github.com
https://github.com/py-pdf/pypdf/commit/ac734dab4eef92bcce50d503949b4d9887d89f11
github.com
and 1 more references View all →

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