CVE-2025-55639: gpac · NULL Pointer Dereference
Affects gpacSource CVE Database V5
Not known to be exploited · CVSS 6.5 Medium.
Data as of 26 Oct 2026, 12:55 UTC
- EPSS
- 0.5% chance of exploitation in 30 days – higher than 43% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:HExploitation evidence
Disclosed: evidence found.
CVE published 23 Jun 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponised: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors
A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 26 Oct 2026.
What to do
Affected software
| Product | Affected | Fixed in |
|---|---|---|
GitHubgpac/gpacpkg:github/gpac/gpacOther threats | Affected
| Fixed in– |
Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.
AI-suggested
Until a fix is available, avoid processing untrusted MP4 files with GPAC MP4Box v2.4 to mitigate risk.
Description
GPAC MP4Box v2.4 was discovered to contain a NULL pointer dereference in the gf_isom_add_track_kind() function at isomedia/isom_write.c. This vulnerability allows attackers to cause a Denial of Service (DoS) via a crafted MP4 file.
References
- github.com/gpac/gpac/issues/3260 (opens in a new tab)
- github.com/sigdevel/pocs/blob/main/res/gpac/MP4Box/23/23_poc.mp4 (opens in a new tab)
- github.com/gpac/gpac/commit/027ce139dda498ee95df36db9f9f6f3cadce8ec9 (opens in a new tab)
- infosec.exchange/@sigdevel/116769184815236865 (opens in a new tab)
- openwall.com/lists/oss-security/2026/06/26/2 (opens in a new tab)