CVE-2026-91088: GPAC URL url.c gf_url_concatenate_ex heap-based overflow

Severity: medium (CVSS 4.8 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.2% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-09-15 · updated 2026-09-15
Weakness: CWE-119

Description

A vulnerability has been found in GPAC up to f1219cde. This issue affects the function gf_url_concatenate_ex of the file utils/url.c of the component URL Handler. The manipulation leads to heap-based buffer overflow. An attack has to be approached locally. Upgrading to version abi-16.23 is capable of addressing this issue. The identifier of the patch is afca1f1181668d85941d51ed1adf647807d5d975. It is advisable to upgrade the affected component.

Affected products

GPAC: f1219cde

References

https://github.com/gpac/gpac/
https://github.com/gpac/gpac/commit/afca1f1181668d85941d51ed1adf647807d5d975
https://github.com/gpac/gpac/issues/3808
https://github.com/gpac/gpac/releases/tag/abi-16.23
https://vuldb.com/cve/CVE-2026-91088
https://vuldb.com/submit/919757
https://vuldb.com/vuln/403650
https://vuldb.com/vuln/403650/cti
https://github.com/gpac/gpac/issues/3808

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