What’s Vulnerable › Vulnerabilities

CVE-2026-4185: GPAC MP4Box swf_parse.c swf_def_bits_jpeg stack-based overflow

• Severity: medium (CVSS 6.3 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: 2026-03-16 · updated 2026-06-17
• Weakness: CWE-119

Description

A vulnerability was found in GPAC up to 2.5-DEV-rev2167-gcc9d617c0-master. This vulnerability affects the function swf_def_bits_jpeg of the file src/scene_manager/swf_parse.c of the component MP4Box. The manipulation of the argument szName results in stack-based buffer overflow. It is possible to launch the attack remotely. The exploit has been made public and could be used. The patch is identified as 8961c74f87ae3fe2d3352e622f7730ca96d50cf1. A patch should be applied to remediate this issue.

Affected products

• GPAC: 2.5-DEV-rev2167-gcc9d617c0-master

References

• https://github.com/PeterXukt/test_pocs/blob/main/gpac/test.swf
• https://github.com/gpac/gpac/
• https://github.com/gpac/gpac/commit/8961c74f87ae3fe2d3352e622f7730ca96d50cf1
• https://github.com/gpac/gpac/issues/3436
• https://vuldb.com/?ctiid.351091
• https://vuldb.com/?id.351091
• https://vuldb.com/?submit.769840

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