Vulnerability · Published Jul 9, 2026 · Assigned by VulDB

CVE-2026-15185GPAC MP4Box vobsub.c vobsub_read_idx out-of-bounds

Low 3.3

In plain English

A low-severity out-of-bounds read in GPAC. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 5% of all known vulnerabilities).

Severity (CVSS 3.1)3.3Low

Exploit odds (30 days)0.2%top 94.8% of all CVEs

Exploited in the wildNo reportsCISA SSVC: poc

Attack toolingNoneno public tooling known

Official description

A vulnerability was determined in GPAC 26.03-DEV. This affects the function vobsub_read_idx of the file /src/media_tools/vobsub.c of the component MP4Box. Executing a manipulation of the argument num_langs can lead to out-of-bounds read. The attack needs to be launched locally. The exploit has been publicly disclosed and may be utilized. This patch is called 532097084729a936bcdf6a27c41003f3bd7dc3ff. It is best practice to apply a patch to resolve this issue. Two different commits were applied to fix this issue.

Affected products (as reported)

Vendor	Product	Versions
n/a	GPAC	26.03-DEV

Weakness: CWE-125, CWE-119 · Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L/E:P/RL:O/RC:C

References

VDB-377111 | GPAC MP4Box vobsub.c vobsub_read_idx out-of-bounds vdb-entry, technical-description
VDB-377111 | CTI Indicators (IOB, IOC, IOA) signature, permissions-required
CVE-2026-15185 | CVE Analysis and Report third-party-advisory
Submit #851214 | GPAC GPAC 26.03-DEV Out-of-Bounds Read third-party-advisory
https://github.com/gpac/gpac/issues/3611 exploit, issue-tracking
https://github.com/gpac/gpac/commit/aa0fb77b82e51b159a2024c440cdf6b571b14d81 patch
https://github.com/gpac/gpac/commit/532097084729a936bcdf6a27c41003f3bd7dc3ff patch
https://github.com/gpac/gpac/ product