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TI-2026-25574 Aliases CVE-2026-33144

GPAC MP4Box Heap Buffer Overflow Write in gf_xml_parse_bit_sequence_bs (NHML BS Parsing)

Priority HIGH 67CWE-787Published · Updated

Key facts

Attack vector
Local
Privileges required
None
User interaction
Required
Attack complexity
Low
Impact type
Code execution
Confidentiality · integrity · availability
High · High · High
Fix status
Fixed

Attack profile from CVSS 3.1 · NVD. Fix status from CNA. Impact type from CWE-787 and the CVSS impact.

Summary

GPAC is an open-source multimedia framework. Prior to commit 86b0e36, a heap-based buffer overflow (write) vulnerability was discovered in GPAC MP4Box. The vulnerability exists in the gf_xml_parse_bit_sequence_bs function in utils/xml_bin_custom.c when processing a crafted NHML file containing malicious <BS> (BitSequence) elements. An attacker can exploit this by providing a specially crafted NHML file, causing an out-of-bounds write on the heap. This issue has been via commit 86b0e36.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00175 7th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix Fixed gpac (gpac): 86b0e36ea4c71402fbdaf7e13d73ba8841003e72

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Poc
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
gpacgpacbefore 86b0e36ea4c71402fbdaf7e13d73ba8841003e7286b0e36ea4c71402fbdaf7e13d73ba8841003e72Patch availableCNA
  • gpac Vendorgpac Affected before 86b0e36ea4c71402fbdaf7e13d73ba8841003e72 Fixed in 86b0e36ea4c71402fbdaf7e13d73ba8841003e72 Patch available CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:gpac:gpac:*:*:*:*:*:*:*:*before 2026-03-17Vulnerablegpac
  • cpe:2.3:a:gpac:gpac:*:*:*:*:*:*:*:* Versions before 2026-03-17 Vulnerable ·gpac

Remediation

  • Fix · CNA gpac (gpac) Fixed in 86b0e36ea4c71402fbdaf7e13d73ba8841003e72

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-33144

References

Exploit 1

Patch 1

  • 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 400 →

Sources

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