CVE-2026-112036: Artifex MuPDF Signature Locking pdf-xref.c free_char_list double free

Severity: medium (CVSS 4.3 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.3% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-10-19 · updated 2026-10-19
Weakness: CWE-119

Description

A vulnerability was detected in Artifex MuPDF up to 1.28.5. This impacts the function free_char_list of the file source/pdf/pdf-xref.c of the component Signature Locking. Performing a manipulation results in double free. The attack may be initiated remotely. The exploit is now public and may be used. The patch is named 3984925b660afb8a781ddf504021e91be1bc671e. To fix this issue, it is recommended to deploy a patch.

Affected products

Artifex MuPDF: 1.28.0, 1.28.1, 1.28.2, 1.28.3, 1.28.4, 1.28.5

References

http://www.ghostscript.com/cgi-bin/findgit.cgi?3984925b660afb8a781ddf504021e91be1bc671e
https://artifex.com/
https://bugs.ghostscript.com/attachment.cgi?id=28609
https://bugs.ghostscript.com/show_bug.cgi?id=709768
https://vuldb.com/cve/CVE-2026-112036
https://vuldb.com/submit/1008495
https://vuldb.com/vuln/421684
https://vuldb.com/vuln/421684/cti

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