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Vulnerability record · public intelligence
CVE-2026-4185
MEDIUM

GPAC MP4Box swf_parse.c swf_def_bits_jpeg stack-based overflow

Published Mar 15, 2026 · Updated Nov 3, 2026

Severity · CVSSMEDIUM · Not scored
Known exploitationNot listed
EPSS / likelihood0.27%
QFinch risk scoreNot available

Original summary

Normalized public record · Updated Nov 3, 2026

GPAC MP4Box swf_parse.c swf_def_bits_jpeg stack-based overflow

Publisher and source text is retained separately from QFinch interpretation.

QFinch assessment

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.

Evidence: public source records

Affected products

Affected scope reported by the available public evidence
Affected package, product or rangeFix status
Consult the referenced vendor advisory for affected versions.Consult source advisory

Matching a version is only one part of assessing exposure. QFinch has not assessed your environment on this public page.

Remediation

Apply the vendor-supported fixed release or mitigation, then verify the affected component is no longer reachable.

  1. Confirm the affected product and reachable code path exist in your environment.
  2. Apply the vendor-supported patch or mitigation from the primary advisory.
  3. Rescan the exact deployed revision and retain verification evidence.
Review primary references

Evidence coverage

FIRST-EPSSCVE-LIST-V5
SSVC priority
LOW
Confidence
Not available
Aliases
None reported

Scores appear only when corresponding evidence exists. Missing data is never interpreted as zero risk.

Sources and record history

  1. VDB-351091 | GPAC MP4Box swf_parse.c swf_def_bits_jpeg stack-based overflow ↗
  2. VDB-351091 | CTI Indicators (IOB, IOC, IOA) ↗
  3. Submit #769840 | gpac MP4Box MP4Box - GPAC version 2.5-DEV-rev2167-gcc9d617c0-master and earlier Stack-based Buffer Overflow ↗
  4. Source repository ↗
  5. Source repository ↗
  6. Patch commit ↗
  7. Source repository ↗

Record history

Published Mar 15, 2026 · Last refreshed Nov 3, 2026