CVE-2026-119777

HIGHPre-NVD 8.88.8
EchelonGraph scoreMEDIUM confidence

“—” beside the score: it is equal to the CVSS score beside it.

This high-severity CVE scores 8.8 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.6% (47th percentile of EPSS-scored CVEs). GitHub Security Advisory CVSS 7.8 is lower than this score; a lower GitHub score revises it only when its advisory is newer than the CVE record's last change, and this advisory (published 2026-10-30) is not newer than that change (2026-11-11), so it does not.

Triggered by: Headline CVSS from a secondary CVSS source
Sources: EPSS, GitHub Security Advisory, a secondary CVSS source

Also known asEUVD-2026-114266 (ENISA EUVD) · GHSA-hcw3-4f5p-2hh5 (GitHub Security Advisories)Source: ENISA EUVD

8.8EG
EchelonGraph verdictPlan a fixRemediate within your standard update timelines (the SSVC decision on this page).
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0.6%CVSS: 8.8Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

A flaw was found in GStreamer's gst-plugins-bad H.266/VVC parser. When processing a malformed H.266 media file or stream, an integer overflow while parsing profile, tier, and level fields can lead to a stack-based buffer overflow. An attacker could cause an application to crash and may be able to execute code in the context of the affected application.

CVSS v3
8.8
EG Score
8.8HIGHmedium confidence
EG Risk
40
EG Risk 40/100

EG Risk is EchelonGraph's 0–100 priority score. It fuses impact severity (EG Severity, the CVSS base score, never the KEV-floored or EPSS-lifted EG Score) with real-world exploitation and automatability, under weights EchelonGraph set by hand, so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner.

How it’s computed (value × EchelonGraph’s weight)
Severity88% × 45%
Impact severity (EG Severity): CVSS 8.8 of 10. Never the KEV-floored or EPSS-lifted EG Score.
Exploitation0.5% × 40%
FIRST EPSS: the 30-day exploitation probability when EchelonGraph scored this CVE.
Automatability0% × 15%
CISA's SSVC Automatable value: no (Vulnrichment).
SSVC (CISA's decision table, applied by EchelonGraph): Track at low or medium mission impact; Track* at high (mission-essential systems).
Exploitation none (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact total (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE.
Action: A fix is available. Apply it within your standard update timelines.
EPSS PROB
0.6%
EPSS %ILE
47th
KEV
Not listed

What the EG score is made of (scorer v4.0: the three questions the 0–10 score mixes, published apart · methodology)

The EG score (8.8): severity, escalated by confirmed exploitation. This CVE's 8.8 is its impact severity (EG Severity), not escalated.

EG Severity
8.8 HIGHCVSS-B, impact only: no KEV listing, EPSS or EG-KEV tier raises it.a secondary CVSS source · CVSS v3.0 or v3.1
EG Likelihood
0.6% within 30 daysSource: FIRST EPSS. FIRST's exploitation probability, not an EchelonGraph model.
Confirmed exploitation
None on record (CISA KEV, EG-KEV Tier 1)Reported apart from the likelihood: an observed fact, not a probability.
EG Priority
SSVC Track at medium mission impactTrack at low or medium mission impact; Track* at high (mission-essential systems).CISA BOD 26-04: 14 days if the affected system is publicly exposed; Fix on system upgrade if it is not.Each input and its source, and whom BOD 26-04 binds: the SSVC and BOD 26-04 blocks below.

SSVC (CISA's decision table, applied by EchelonGraph)Track at low or medium mission impact; Track* at high (mission-essential systems).

A fix is available. Apply it within your standard update timelines.

Exploitation none (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact total (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE. Mission impact is CISA's Mission & Well-being decision point, and only you can judge it. CISA's table makes it high when Mission Prevalence is Essential — the vulnerable component "directly provides capabilities that constitute at least one MEF for at least one entity" (MEF: mission essential function) — or when Public Well-Being Impact is Irreversible: "multiple fatalities are likely", the cyber-physical system "is likely lost or destroyed", "extreme or serious externalities" are imposed on other parties, or social systems such as elections or the financial grid "are destabilized and potentially collapse". CISA's decision table

BOD 26-04 (CISA's remediation timeline, Table 1)14 days if the affected system is publicly exposed; Fix on system upgrade if it is not.

The score's inputs: In CISA KEV no (CISA's KEV catalog) · Automatable no (CISA Vulnrichment) · Technical impact total (CISA Vulnrichment). Whether your system is publicly exposed is yours to answer. BOD 26-04 binds US Federal Civilian Executive Branch agencies; for anyone else it is CISA's published timeline, a reference rather than an obligation. The directive · how EchelonGraph applies it

Published

October 30, 2026

Last Modified

November 11, 2026

Advisory Details (3)

Auto-updated Oct 30, 2026
Patch available. Sources: redhat.
Web page

h266parser: Avoid integer overflow when parsing profile / tier / level (!11241) · Merge requests · GStreamer / gstreamer · GitLab

https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/11241
Red Hat

2564164 – (CVE-2026-119777) CVE-2026-119777 gstreamer1-plugins-bad-free: gstreamer1-plugins-bad-free: stack buffer overflow in H.266/VVC parser

https://bugzilla.redhat.com/show_bug.cgi?id=2564164
Red HatMentions a patch (unverified)

CVE-2026-119777 - Red Hat Customer Portal

Affected: Red Hat Enterprise Linux 8 or OpenShift Container Platform 4, is affected by this vulnerability and a fix may be released to a

https://access.redhat.com/security/cve/CVE-2026-119777

Vendor Advisories for CVE-2026-119777(3)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Affected Packages

(3 across 3 ecosystems)
Debian:12(1)
PackageVulnerable rangeFix by version rangeDependents
gst-plugins-bad1.01.22.0-4 ... 1.29.2-2 (99 versions)
  • every version on: no fix on record
—
Debian:13(1)
PackageVulnerable rangeFix by version rangeDependents
gst-plugins-bad1.01.26.10-1 ... 1.29.2-2 (42 versions)
  • every version on: no fix on record
—
Debian:14(1)
PackageVulnerable rangeFix by version rangeDependents
gst-plugins-bad1.01.26.10-1 ... 1.28.1-3 (26 versions)
  • every version up to 1.28.2-1: fixed in 1.28.2-1
—

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 12× in last 7d / 30× in last 30d)

Each row is a time one of our pipelines fetched, updated or re-scored this CVE. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed its CVE.org record (CNA or CISA ADP). An arrow marks a change the record states ("CVSS v3 → 9.1"); EPSS and GHSA rows show the values recorded at that time, not what changed (EPSS values are rounded; hover one for the exact figures). "EchelonGraph re-scored" is our own recompute of this CVE's score, not an update from a source, and is not counted in the refreshes above. Most recent first.

  1. 2026-11-13 16:50 UTCEPSS rescoreEPSS 0.6% · 47th percentile
  2. 2026-11-12 16:33 UTCEPSS rescoreEPSS 0.6% · 47th percentile
  3. 2026-11-11 23:33 UTCEchelonGraph re-scored
  4. 2026-11-11 23:33 UTCGHSA enrichmentGHSA-hcw3-4f5p-2hh5 · GitHub severity HIGH · GitHub CVSS 7.8
  5. 2026-11-11 22:43 UTCEchelonGraph re-scored
  6. 2026-11-11 22:43 UTCGHSA enrichmentGHSA-hcw3-4f5p-2hh5 · GitHub severity HIGH · GitHub CVSS 7.8
  7. 2026-11-11 16:38 UTCEPSS rescoreEPSS 0.5% · 46th percentile
  8. 2026-11-11 14:27 UTCEchelonGraph re-scored
  9. 2026-11-11 14:27 UTCGHSA enrichmentGHSA-hcw3-4f5p-2hh5 · GitHub severity HIGH · GitHub CVSS 7.8
  10. 2026-11-11 13:59 UTCEchelonGraph re-scored
  11. 2026-11-11 13:59 UTCGHSA enrichmentGHSA-hcw3-4f5p-2hh5 · GitHub severity HIGH · GitHub CVSS 7.8
  12. 2026-11-11 12:29 UTCEchelonGraph re-scored
  13. 2026-11-11 12:29 UTCGHSA enrichmentGHSA-hcw3-4f5p-2hh5 · GitHub severity HIGH · GitHub CVSS 7.8
  14. 2026-11-10 16:42 UTCEPSS rescoreEPSS 0.5% · 45th percentile
  15. 2026-11-09 16:34 UTCEPSS rescoreEPSS 0.5% · 45th percentile
  16. 2026-11-08 16:38 UTCEPSS rescoreEPSS 0.5% · 45th percentile
  17. 2026-11-07 16:38 UTCEPSS rescoreEPSS 0.5% · 45th percentile
  18. 2026-11-06 16:36 UTCEPSS rescoreEPSS 0.5% · 45th percentile
  19. 2026-11-05 16:36 UTCEPSS rescoreEPSS 0.5% · 45th percentile
  20. 2026-11-04 22:27 UTCEchelonGraph re-scored
  21. 2026-11-04 22:27 UTCGHSA enrichmentGHSA-hcw3-4f5p-2hh5 · GitHub severity HIGH · GitHub CVSS 7.8
  22. 2026-11-04 22:17 UTCEchelonGraph re-scored
  23. 2026-11-04 22:17 UTCGHSA enrichmentGHSA-hcw3-4f5p-2hh5 · GitHub severity HIGH · GitHub CVSS 7.8
  24. 2026-11-04 16:34 UTCEPSS rescoreEPSS 0.5% · 45th percentile
  25. 2026-11-03 20:27 UTCEchelonGraph re-scored
Show 20 more
  1. 2026-11-03 20:27 UTCGHSA enrichmentGHSA-hcw3-4f5p-2hh5 · GitHub severity HIGH · GitHub CVSS 7.8
  2. 2026-11-03 19:26 UTCEchelonGraph re-scored▲ 1.00
  3. 2026-11-03 19:26 UTCGHSA enrichmentGHSA-hcw3-4f5p-2hh5 · GitHub severity HIGH · GitHub CVSS 7.8
  4. 2026-11-03 19:26 UTCMITRE cvelistV5CVSS v3 → 8.8
  5. 2026-11-03 16:46 UTCEPSS rescoreEPSS 0.2% · 8th percentile
  6. 2026-11-03 10:30 UTCEchelonGraph re-scored
  7. 2026-11-03 10:29 UTCGHSA enrichmentGHSA-hcw3-4f5p-2hh5 · GitHub severity HIGH · GitHub CVSS 7.8
  8. 2026-11-03 09:48 UTCEchelonGraph re-scored
  9. 2026-11-03 09:48 UTCGHSA enrichmentGHSA-hcw3-4f5p-2hh5 · GitHub severity HIGH · GitHub CVSS 7.8
  10. 2026-11-02 16:44 UTCEPSS rescoreEPSS 0.2% · 8th percentile
  11. 2026-11-01 16:33 UTCEPSS rescoreEPSS 0.2% · 8th percentile
  12. 2026-10-31 16:32 UTCEPSS rescoreEPSS 0.2% · 8th percentile
  13. 2026-10-30 21:02 UTCENISA EUVD ID recordedEUVD-2026-114266 · Source: ENISA EUVD
  14. 2026-10-30 20:26 UTCEchelonGraph re-scored
  15. 2026-10-30 20:26 UTCGHSA enrichmentGHSA-hcw3-4f5p-2hh5 · GitHub severity HIGH · GitHub CVSS 7.8
  16. 2026-10-30 19:25 UTCEchelonGraph re-scored
  17. 2026-10-30 19:25 UTCGHSA enrichmentGHSA-hcw3-4f5p-2hh5 · GitHub severity HIGH · GitHub CVSS 7.8
  18. 2026-10-30 18:26 UTCEchelonGraph re-scored
  19. 2026-10-30 18:06 UTCEchelonGraph re-scoredFirst assessed: 7.8 HIGH
  20. 2026-10-30 18:04 UTCMITRE cvelistV5first tracked

Related CVEs(same product + same CWE)

Frequently asked(5)

What is CVE-2026-119777?
CVE-2026-119777 is a high-severity vulnerability; its CVE record was published on October 30, 2026. A flaw was found in GStreamer's gst-plugins-bad H.266/VVC parser. When processing a malformed H.266 media file or stream, an integer overflow while parsing profile, tier, and level fields can lead to a stack-based buffer overflow. An attacker could cause an application to crash and may be able to…
When was CVE-2026-119777 made public?
CVE-2026-119777 was made public on April 7, 2026: that is the date its CVE record's CNA, Red Hat, Inc., gives for when the vulnerability was made public. The CVE record itself was published on October 30, 2026. EchelonGraph's copy of the record carries a last-modified date of November 11, 2026; the record at its source may have been updated since.
Is CVE-2026-119777 actively exploited?
CVE-2026-119777 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.6% probability of exploitation in the next 30 days (47th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-119777?
CVE-2026-119777 has a CVSS base score of 8.8 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-119777?
A fix for CVE-2026-119777 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-119777 are linked in the Vendor Advisories panel on this page.

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