CVE-2026-79513: A divide-by-zero vulnerability in the gf_dash_get_timeline_duration function (src/media_tools/dash_client.c) o

Routine

MEDIUM 6.5DOWNGRADE

CVE-2026-79513 is a medium-severity flaw (CVSS 6.5) affecting gpac. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

A divide-by-zero vulnerability in the gf_dash_get_timeline_duration function (src/media_tools/dash_client.c) of GPAC v26.07.0 allows attackers to cause a Denial of Service (DoS) via a crafted MPD SegmentTimeline. Fixed in 2fd5a06ab226767900fd86edb5a1e8bfc1010640.

Why this priority

Public exploit reference

No fix is published yet: follow the downgrade or mitigation steps.

Risk facts

CVSS score	6.5 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	Required
EPSS exploit chance	0.4% (top 69%)
CISA exploited list	No
Weakness	CWE-369
Published	2026-09-09
Last modified	2026-09-15

Publisher (CNA): MITRE · Vendor: gpac

Last updated 2026-09-15 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-09-09 21:17 UTCPublished CVE record published
2026-09-15 17:03 UTCUpdated Record last modified

gpac gpac DOWNGRADE

Affected: 26.07.0

Fixed in: no fixed release known

Safe to downgrade to: a release before 26.07.0

1. Check installed version

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

2. No fixed release: DOWNGRADE to a release before 26.07.0 (Debian / Ubuntu)

apt-cache madison gpac sudo apt install gpac=<VERSION_BEFORE_26.07.0> sudo apt-mark hold gpac

2. No fixed release: DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list gpac sudo dnf downgrade gpac-<VERSION_BEFORE_26.07.0> sudo dnf versionlock add gpac

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

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-2026-79513?

gpac: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2026-79513 being exploited?

CVE-2026-79513 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-2026-79513 affect?

CVE-2026-79513 affects gpac. Severity is medium (CVSS 6.5). A divide-by-zero vulnerability in the gf_dash_get_timeline_duration function (src/media_tools/dash_client.c) of GPAC v26.07.0 allows attackers to cause a Denial of Service (DoS) via a crafted MPD SegmentTimeline. Fixed in 2fd5a06ab226767900

How urgent is CVE-2026-79513?

Priority 35/100. Public exploit reference

Related CVEs

CVE-2026-79514 MEDIUM 6.5 DOWNGRADE An out-of-bounds read in the gf_dm_data_received function (downloader.c) of GPAC v26.07.0 allows attackers to
CVE-2026-79522 MEDIUM 6.5 DOWNGRADE An out-of-bounds read in the gf_dm_get_chunk_data function (src/utils/downloader.c) of GPAC v26.07.0 allows at

References

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