Medium severity · published Oct 19, 2026
CVE-2026-112036
Artifex MuPDF Signature Locking pdf-xref.c free_char_list double free
4.3
CVSS
0.3%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
Required
Confidentiality
None
Integrity
None
Availability
Low
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.3% · higher than 26% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
MU
MuPDF · Artifex
1.28.0; 1.28.1; 1.28.2; 1.28.3; 1.28.4; 1.28.5 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-112036
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-112036
www.ghostscript.com
http://www.ghostscript.com/cgi-bin/findgit.cgi?3984925b660afb8a781ddf504021e91be1bc671e
artifex.com
https://artifex.com/
bugs.ghostscript.com
https://bugs.ghostscript.com/attachment.cgi?id=28609
bugs.ghostscript.com
https://bugs.ghostscript.com/show_bug.cgi?id=709768
vuldb.com
https://vuldb.com/cve/CVE-2026-112036
vuldb.com
https://vuldb.com/submit/1008495
More from MuPDF
9.8
CVE-2019-7321
Usage of an uninitialized variable in the function fz_load_jpeg in Artifex MuPDF 1.14 can result in a heap overflow vulnerability that allows an attacker to execute arbitrary code
9.8
CVE-2016-6525
Heap-based buffer overflow in the pdf_load_mesh_params function in pdf/pdf-shade.c in MuPDF allows remote attackers to cause a denial of service (crash) or execute arbitrary code…
7.8
CVE-2020-16600
A Use After Free vulnerability exists in Artifex Software, Inc
7.8
CVE-2012-5340
SumatraPDF 2.1.1/MuPDF 1.0 allows remote attackers to cause an Integer Overflow in the lex_number() function via a corrupt PDF file
7.8
CVE-2019-13290
Artifex MuPDF 1.15.0 has a heap-based buffer overflow in fz_append_display_node located at fitz/list-device.c, allowing remote attackers to execute arbitrary code via a crafted…