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TI-2026-86090 Aliases CVE-2026-124030GHSA-xx5j-3p7q-h39r

Type confusion in GPAC MP4Box BIFS field-replace handling

Priority LOW 29CWE-843Published · Updated

Key facts

Attack vector
Local
Privileges required
None
User interaction
Passive
Attack complexity
Low
Attack requirements
None
Impact type
Denial of service
Confidentiality · integrity · availability
None · None · High
Fix status
No fix listed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-843 and the CVSS impact.

Summary

GPAC through 26.07.0 contains a type confusion flaw in gf_sg_command_apply() that does not verify that BIFS field-replace command types match the target node fields, classified as CWE-843. An attacker who gets a user to open a crafted XMT file with MP4Box, for example through chapter import, can crash the program. A public exploit is linked in the references.

Written with Claude Haiku 5.5 from the sources below · 2026-11-06

Description from the CNA

GPAC through 26.07.0 contains a type confusion vulnerability in gf_sg_command_apply() in src/scenegraph/commands.c that fails to verify BIFS field-replace command types match target node fields. Attackers can supply a crafted XMT file opened with MP4Box, such as via chapter import, causing gf_sg_vrml_field_clone() to memcpy from invalid pointers and crash.

Why it matters now

EPSS 0.00121 1st percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by the CNA
Fix No fix listed No fixed version in the sources yet

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

VendorProductAffected versionsFixed inStatusSource
gpacgpacup to 26.07.0—No fix listedCNA
  • gpac Vendorgpac Affected up to 26.07.0 Fixed in — No fix listed CNA

Remediation

The sources list no fixed version for gpac.

Written with Claude Haiku 5.5 from the sources below · 2026-11-06

Timeline

  1. 2026-11-06 Threatist record created from CVE-2026-124030
  2. 2026-11-06 Alias added: GHSA-xx5j-3p7q-h39r
  3. 2026-11-08 Priority changed: MEDIUM → LOW

References

Exploit 1

Patch 1

Other 3

  • TI-2023-25004 An issue was discovered in gpac version 2.3-DEV-rev588-g7edc40fee-master, allows remote… CVSS 3.1CRITICAL 9.8
  • TI-2025-43085 GPAC v2.4.0 was discovered to contain an out-of-bounds read in the oggdmx_parse_tags function. CVSS 3.1HIGH 8.2
  • TI-2024-00295 Stack-based Buffer Overflow in gpac/gpac CVSS 3.1CRITICAL 9.8
  • TI-2023-25341 Heap Buffer Overflow vulnerability in GPAC version 2.3-DEV-rev617-g671976fcc-master… CVSS 3.1CRITICAL 9.8
  • TI-2023-02661 NULL Pointer Dereference in gpac/gpac CVSS 3.1CRITICAL 9.8
  • TI-2026-22173 GPAC NHML Demuxer (dmx_nhml.c) Vulnerable to Stack Buffer Overflow CVSS 4.0HIGH 7.7
See all 406 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences