CVE-2024-56139: A stack overflow Segmentation Fault (SEGV) and Memory Leak in pdftools

Severity: medium (CVSS 6.9 v4.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.4% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2024-12-17 · updated 2026-06-17
Weakness: CWE-121

Description

pdftools is a high level tools to convert PDF files to ePUB formats. In versions up to and including 0.5.0 maliciously crafted epub files can cause a stack overflow leading to a crash. This issue has not yet been addressed and users are advised to avoid untrusted input to their systems.

Affected products

leonhad pdftools: through 0.5.0

References

https://github.com/leonhad/pdftools/security/advisories/GHSA-hgvf-4pf3-fwc9
https://github.com/leonhad/pdftools/security/advisories/GHSA-hgvf-4pf3-fwc9

Get alerted when CVE-2024-56139 or the next vulnerability affects your stack