CVE-2026-124030: GPAC through 26.07.0 contains a type confusion vulnerability in gf_sg_command_apply() in src/scenegraph/comman

Q: How do I fix CVE-2026-124030?

gpac: upgrade to newer than 26.07.0. Exact commands for each OS are on this page.

Q: Is CVE-2026-124030 being exploited?

CVE-2026-124030 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2026-124030 affect?

CVE-2026-124030 affects gpac. Severity is medium (CVSS 5.5). 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 opene

Q: How urgent is CVE-2026-124030?

Priority 19/100. No elevated risk signals yet.

Routine

MEDIUM 5.5UPGRADE

CVE-2026-124030 is a medium-severity flaw (CVSS 5.5) affecting gpac. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

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 this priority

No elevated risk signals yet

A fixed release or distro patch exists.

Risk facts

CVSS score	5.5 (Medium)
EPSS exploit chance	n/a
CISA exploited list	No
Weakness	CWE-843
Published	2026-11-06
Last modified	2026-11-06

Publisher (CNA): VulnCheck · Vendor: gpac · Source: CVE Program record (NVD analysis pending)

Last updated 2026-11-06 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-11-06 19:14 UTCPublished CVE record published
2026-11-06 19:14 UTCUpdated Record last modified

gpac gpac UPGRADE

Affected: <= 26.07.0

Fixed in: newer than 26.07.0

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy gpac || rpm -q gpac || gpac --version

2. UPGRADE to newer than 26.07.0 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade gpac

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade gpac

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2026-124030?

gpac: upgrade to newer than 26.07.0. Exact commands for each OS are on this page.

Is CVE-2026-124030 being exploited?

CVE-2026-124030 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2026-124030 affect?

CVE-2026-124030 affects gpac. Severity is medium (CVSS 5.5). 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 opene

How urgent is CVE-2026-124030?

Priority 19/100. No elevated risk signals yet.

Related CVEs

CVE-2026-124031 MEDIUM 5.5 UPGRADE GPAC through 26.07.0 contains a type confusion vulnerability in drawable_get_aspect_2d_mpeg4() and TraverseSha
CVE-2021-4043 MEDIUM 5.5 UPGRADE MITIGATE NULL Pointer Dereference in GitHub repository gpac/gpac prior to 1.1.0.
CVE-2025-60467 HIGH 7.5 UPGRADE A use-after-free in the gf_filter_pid_inst_swap_delete_task function (/filter_core/filter_pid.c) of GPAC Proje
CVE-2025-60474 HIGH 7.5 UPGRADE A buffer overflow in the gf_media_import function (/media_tools/av_parsers.c) of GPAC Project/MP4Box before 26
CVE-2025-60464 HIGH 7.8 UPGRADE A use-after-free in the gf_sei_load_from_state_internal function (/filters/sei_load.c) of GPAC Project/MP4Box

References

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