CVE-2026-33144

Published Mar 20, 2026

Last updated 14 days ago

CVSS medium 5.8

Overview

Description
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.
Source
security-advisories@github.com
NVD status
Analyzed
Products
gpac

Risk scores

CVSS 3.1

Type
Primary
Base score
7.8
Impact score
5.9
Exploitability score
1.8
Vector string
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Severity
HIGH

Weaknesses

security-advisories@github.com
CWE-787

Social media

Hype score
Not currently trending

Configurations

Related CVEs

  1. GPAC is an open-source multimedia framework. In versions up to and including 26.02.0, a stack buffer overflow occurs during NHML file parsing in `src/filters/dmx_nhml.c`. The value of the xmlHeaderEnd XML attribute is copied from att->value into szXmlHeaderEnd[1000] using strcpy() without any length validation. If the input exceeds 1000 bytes, it overwrites beyond the stack buffer boundary. Commit 9bd7137fded2db40de61a2cf3045812c8741ec52 patches the issue.•CVE-2026-27821
  2. A security vulnerability has been detected in GPAC up to 2.4.0. This affects the function gf_text_import_srt_bifs of the file src/scene_manager/text_to_bifs.c of the component SRT Subtitle Import. Such manipulation leads to out-of-bounds write. The attack needs to be performed locally. The exploit has been disclosed publicly and may be used. The name of the patch is 10c73b82cf0e367383d091db38566a0e4fe71772. It is best practice to apply a patch to resolve this issue.•CVE-2026-1418
  3. A weakness has been identified in GPAC up to 2.4.0. Affected by this issue is the function dump_isom_rtp of the file applications/mp4box/filedump.c. This manipulation causes null pointer dereference. The attack needs to be launched locally. The exploit has been made available to the public and could be used for attacks. Patch name: f96bd57c3ccdcde4335a0be28cd3e8fe296993de. Applying a patch is the recommended action to fix this issue.•CVE-2026-1417
  4. A security flaw has been discovered in GPAC up to 2.4.0. Affected by this vulnerability is the function DumpMovieInfo of the file applications/mp4box/filedump.c. The manipulation results in null pointer dereference. The attack must be initiated from a local position. The exploit has been released to the public and may be used for attacks. The patch is identified as d45c264c20addf0c1cc05124ede33f8ffa800e68. It is advisable to implement a patch to correct this issue.•CVE-2026-1416
  5. A vulnerability was identified in GPAC up to 2.4.0. Affected is the function gf_media_export_webvtt_metadata of the file src/media_tools/media_export.c. The manipulation of the argument Name leads to null pointer dereference. The attack must be carried out locally. The exploit is publicly available and might be used. The identifier of the patch is af951b892dfbaaa38336ba2eba6d6a42c25810fd. To fix this issue, it is recommended to deploy a patch.•CVE-2026-1415

References

Sources include official advisories and independent security research.