Gst-plugins-good: assertion failures in FLV demuxer when parsing malformed enhanced audio/video tags
Written by anthropic/claude-haiku-5.5 from the sources below. Verify against them.
- Exploited
- No known exploitation
- Fix
- Fixed in 1.28.2
- Who is exposed
- Not reported
Do first: Upgrade to a fixed version: 1.28.2.
- Exploitation0/40No signal
- Exposure7/25Reachable over the network without a login · Data gap: No advisory context yet
- Reach10/20Shipped in major Linux distributions
- Severity6.5/10CVSS 6.5
- No patch0/5No signal
What would change the score
- Would score about 79 if added to CISA KEV
- Would score about 74 if CISA's SSVC rates exploitation active
- Would score about 39 if advisories confirm default setups are exposed
CVE-2026-119843 is not in CISA's Known Exploited Vulnerabilities (KEV) catalog. No public exploit code is tracked. It is rated CVSS 6.5 (medium) and affects Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 7, Red Hat Enterprise Linux 8 and 2 more; fixed in 1.28.2.
- Last modified
- Where the record stands: published, rejected by its publisher, or superseded by another id.What do these mean? →
- Published
- Whether CISA lists it in its Known Exploited Vulnerabilities catalog: proof that attackers are using it.What do these mean? →
- Not listed in CISA KEV
- FIRST's estimate of the chance attackers exploit it in the next 30 days, updated daily.What do these mean? →
- 0.56% · 46th percentile
- A 0-100 score for how much a CVE matters across the industry: exploitation, exposure, how widely the software is used, severity and whether a fix exists.What do these mean? →
- 24/100 · provisional
- Fix
- Fixed in 1.28.2
- Whether working attack code is public (Exploit-DB, Metasploit, Nuclei or GitHub). Public code makes attacks easier.What do these mean? →
- None on Exploit-DB, Metasploit or GitHub
- Exploitation: none
- Automatable: no
- Technical impact: partial
Summary
GStreamer's gst-plugins-good package, which handles FLV media demuxing, is affected. A specially crafted or truncated FLV file can cause a GStreamer-based application to crash or fail an internal assertion, resulting in a denial of service.
Read the original description
A flaw was found in GStreamer's gst-plugins-good package. The FLV media demuxer does not properly validate buffer sizes and data availability when processing enhanced audio and video tags in malformed or truncated FLV streams. A remote attacker could exploit this vulnerability by providing a specially crafted FLV media file that, when opened or streamed by a GStreamer-based application, triggers an assertion failure or a process crash, leading to denial of service.
What to do
Upgrade to a fixed version: 1.28.2.
Timeline
- CVE published
- First seen by cve.now
- CISA SSVC assessment
Exploitation: none · Automatable: no · Technical impact: partial
- Record last updated
Affected versions
- gstreamer1-plugins-good
Version range not reported
- gstreamer1-plugins-good
Version range not reported
- gstreamer1-plugins-good
Version range not reported
- gstreamer1-plugins-good
Version range not reported
- GStreamer project gst-plugins-good
fixed in 1.28.2
Evidence 4
- Report
- Link
- Link
- Link
Corrections
None so far.
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Questions about CVE-2026-119843
Is CVE-2026-119843 being exploited?
It is not in CISA's Known Exploited Vulnerabilities catalog, and CISA's SSVC assessment does not mark exploitation as active. That does not mean it has not been attacked: vendors and researchers can report attacks before CISA lists them. No public exploit code is tracked.Source: cve.now feed data
Which versions are affected by CVE-2026-119843?
gst-plugins-good: before 1.28.2.Source: cve.now feed data
How do I fix CVE-2026-119843?
Upgrade to a fixed version: 1.28.2.Source: cve.now feed data