UBUNTU-CVE-2026-59937
pypdf is a pure-python PDF library vulnerable to crafted PDFs with repeated malformed cross-reference streams causing long runtimes during recovery of broken cross-reference table entries. This denial-of-service condition affects versions prior to 6.14.0 and is fixed in version 6.14.0.
AI Analysis
Technical Summary
The vulnerability in pypdf prior to version 6.14.0 allows an attacker to craft a PDF containing repeated malformed cross-reference streams. When processed, pypdf spends excessive time recovering broken cross-reference table entries, leading to a denial-of-service condition due to long runtimes. This issue is resolved in pypdf version 6.14.0.
Potential Impact
An attacker can cause a denial-of-service by supplying a specially crafted PDF that triggers prolonged processing time in the pypdf library. This may degrade application performance or cause unavailability when parsing such PDFs. There is no indication of code execution or data disclosure.
Mitigation Recommendations
Upgrade pypdf to version 6.14.0 or later, where this issue is fixed. No other mitigation is indicated.
UBUNTU-CVE-2026-59937
Description
pypdf is a pure-python PDF library vulnerable to crafted PDFs with repeated malformed cross-reference streams causing long runtimes during recovery of broken cross-reference table entries. This denial-of-service condition affects versions prior to 6.14.0 and is fixed in version 6.14.0.
CVSS v4.0
Affected software
pkg:deb/ubuntu/[email protected]~esm2?arch=source&distro=esm-apps/xenialpkg:deb/ubuntu/[email protected]~esm2?arch=source&distro=esm-apps/bionicpkg:deb/ubuntu/[email protected]?arch=source&distro=focalpkg:deb/ubuntu/[email protected]?arch=source&distro=jammypkg:deb/ubuntu/[email protected]?arch=source&distro=nobleRun on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The vulnerability in pypdf prior to version 6.14.0 allows an attacker to craft a PDF containing repeated malformed cross-reference streams. When processed, pypdf spends excessive time recovering broken cross-reference table entries, leading to a denial-of-service condition due to long runtimes. This issue is resolved in pypdf version 6.14.0.
Potential Impact
An attacker can cause a denial-of-service by supplying a specially crafted PDF that triggers prolonged processing time in the pypdf library. This may degrade application performance or cause unavailability when parsing such PDFs. There is no indication of code execution or data disclosure.
Mitigation Recommendations
Upgrade pypdf to version 6.14.0 or later, where this issue is fixed. No other mitigation is indicated.
Technical Details
- Gcve Source
- db.gcve.eu
- Osv Id
- UBUNTU-CVE-2026-59937
- Osv Schema Version
- 1.7.0
- Aliases
- []
- Ecosystems
- ["Ubuntu:Pro:16.04:LTS","Ubuntu:Pro:18.04:LTS","Ubuntu:20.04:LTS","Ubuntu:22.04:LTS","Ubuntu:24.04:LTS","Ubuntu:25.10","Ubuntu:26.04:LTS"]
- Database Specific Severity
- null
- Cvss Version
- 4.0
Threat ID: 6a58b44f68715ace43d6b6d1
Added to database: 07/16/2026, 10:37:03 UTC
Last enriched: 07/16/2026, 11:29:17 UTC
Last updated: 07/31/2026, 19:24:49 UTC
Views: 5
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