CVE-2026-88914

MEDIUMPre-NVD 4.44.4
EchelonGraph scoreMEDIUM confidence

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

Score 4.4 from GitHub Security Advisory (severity: MODERATE) published 2026-09-11. A secondary CVSS source baseline 4.4; sources differ by 0.0.

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

Also known asEUVD-2026-75905 (ENISA EUVD) · GHSA-h8hr-49hh-qr69 (GitHub Security Advisories)Source: ENISA EUVD

4.4EG
EchelonGraph verdictMonitorRemediate within your standard update timelines (the SSVC decision on this page).
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0.1%CVSS: 4.4Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

A flaw was found in GStreamer's gst-plugins-good isomp4 plugin. When processing a specially crafted MP4 or MOV file containing CEA-608 closed-caption data, an integer overflow in 32-bit unsigned arithmetic can bypass a bounds check in the caption parser. This leads to an out-of-bounds heap read of up to 244 bytes, which is then included in the downstream caption output. An attacker could exploit this by tricking a user into opening a malicious media file, potentially resulting in disclosure of adjacent heap memory or application crash.

CVSS v3
4.4
EG Score
4.4MEDIUMmedium confidence
EG Risk
20
EG Risk 20/100

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)
Severity44% × 45%
Impact severity (EG Severity): CVSS 4.4 of 10. Never the KEV-floored or EPSS-lifted EG Score.
Exploitation0.1% × 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 every mission impact level.
Exploitation none (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact partial (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
0.1%
EPSS %ILE
1st
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 (4.4): severity, escalated by confirmed exploitation. This CVE's 4.4 is its impact severity (EG Severity), not escalated.

EG Severity
4.4 MEDIUMCVSS-B, impact only: no KEV listing, EPSS or EG-KEV tier raises it.GitHub Security Advisory CVSS
EG Likelihood
0.1% within 30 daysSource: FIRST EPSS (model v2026.06.15, score date 2026-11-05). 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 every mission impact level.CISA BOD 26-04: 60 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 every mission impact level.

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

Exploitation none (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact partial (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)60 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 partial (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

September 11, 2026

Last Modified

November 6, 2026

Advisory Details (4)

Auto-updated Sep 11, 2026
Patch available. Sources: redhat.
Web page

qtdemux: Ensure enough data is available for reading closed caption boxes (!12433) · Merge requests · GStreamer / gstreamer · GitLab

https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/12433
Red Hat

2531416 – (CVE-2026-88914) CVE-2026-88914 gstreamer1-plugins-good: gstreamer: integer overflow and out-of-bounds read in qtdemux CEA-608 closed-caption parser

https://bugzilla.redhat.com/show_bug.cgi?id=2531416
Red HatMentions a patch (unverified)

CVE-2026-88914 - 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-2026-88914

Vendor Advisories for CVE-2026-88914(1)

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

Patch Availability(1)

Vendor / EcosystemFix (by version range) / PatchReleasedSource
ubuntulibgstreamer-plugins-good1.0-dev (1.24.2-1ubuntu1.8) @ noble2026-10-22ubuntu

Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.

Affected Packages

(3 across 3 ecosystems)
Debian:12(1)
PackageVulnerable rangeFix by version rangeDependents
gst-plugins-good1.01.22.0-5, 1.22.0-5+deb12u1, 1.22.0-5+deb12u2, 1.22.0-5+deb12u3
  • every version up to 1.22.0-5+deb12u4: fixed in 1.22.0-5+deb12u4
—
Debian:13(1)
PackageVulnerable rangeFix by version rangeDependents
gst-plugins-good1.01.26.10-1 ... 1.29.2-1 (33 versions)
  • every version on: no fix on record
—
Debian:14(1)
PackageVulnerable rangeFix by version rangeDependents
gst-plugins-good1.01.26.10-1 ... 1.28.6-1 (27 versions)
  • every version up to 1.28.7-1: fixed in 1.28.7-1
—

Weakness Classification(1)

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

All Vendor Advisories

(1)

Every vendor that published an advisory referencing this CVE — pulled from our cve_vendor_advisories aggregation. Click any row for the vendor's original advisory page.

Data Freshness Timeline

(refreshed 7× in last 7d / 31× 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.

Showing the most recent 100 of 143 rows on record for this CVE.

A repeat, a row identical to one the same pipeline wrote less than 10 seconds earlier, is not a separate refresh and is not counted. None are among the latest 100 rows. The 43 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

  1. 2026-11-12 16:35 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  2. 2026-11-11 16:41 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  3. 2026-11-10 16:45 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  4. 2026-11-09 16:36 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  5. 2026-11-08 16:41 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  6. 2026-11-07 16:40 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  7. 2026-11-06 16:39 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  8. 2026-11-06 02:27 UTCEchelonGraph re-scored
  9. 2026-11-06 02:27 UTCGHSA enrichmentGHSA-h8hr-49hh-qr69 · GitHub severity MODERATE · GitHub CVSS 4.4
  10. 2026-11-06 01:23 UTCEchelonGraph re-scored
  11. 2026-11-06 01:23 UTCGHSA enrichmentGHSA-h8hr-49hh-qr69 · GitHub severity MODERATE · GitHub CVSS 4.4
  12. 2026-11-05 16:39 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  13. 2026-11-04 16:37 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  14. 2026-11-03 16:49 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  15. 2026-11-02 16:46 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  16. 2026-11-01 16:35 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  17. 2026-10-31 16:33 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  18. 2026-10-28 16:33 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  19. 2026-10-27 16:32 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  20. 2026-10-26 16:32 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  21. 2026-10-25 16:34 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  22. 2026-10-25 13:53 UTCEchelonGraph re-scored
  23. 2026-10-24 16:34 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  24. 2026-10-23 16:32 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  25. 2026-10-22 16:35 UTCEPSS rescoreEPSS 0.1% · 1st percentile
Show 75 more
  1. 2026-10-22 12:33 UTCEchelonGraph re-scored
  2. 2026-10-22 12:33 UTCVendor advisory
  3. 2026-10-22 12:33 UTCGHSA enrichmentGHSA-h8hr-49hh-qr69 · GitHub CVSS 4.4
  4. 2026-10-21 16:34 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  5. 2026-10-20 16:33 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  6. 2026-10-19 16:33 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  7. 2026-10-18 16:33 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  8. 2026-10-18 03:03 UTCEchelonGraph re-scored
  9. 2026-10-17 16:35 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  10. 2026-10-16 16:44 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  11. 2026-10-14 16:34 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  12. 2026-10-13 16:35 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  13. 2026-10-12 16:35 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  14. 2026-10-12 14:49 UTCEchelonGraph re-scored
  15. 2026-10-11 19:15 UTCEchelonGraph re-scored
  16. 2026-10-11 16:32 UTCEchelonGraph re-scored
  17. 2026-10-11 13:49 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  18. 2026-10-11 13:48 UTCEchelonGraph re-scored
  19. 2026-10-11 07:00 UTCEchelonGraph re-scored
  20. 2026-10-11 07:00 UTCVendor advisory
  21. 2026-10-11 07:00 UTCGHSA enrichmentGHSA-h8hr-49hh-qr69 · GitHub CVSS 4.4
  22. 2026-10-10 20:00 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  23. 2026-10-10 05:18 UTCEchelonGraph re-scored
  24. 2026-10-10 05:18 UTCVendor advisory
  25. 2026-10-10 05:18 UTCGHSA enrichmentGHSA-h8hr-49hh-qr69 · GitHub CVSS 4.4
  26. 2026-10-09 20:07 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  27. 2026-10-09 05:06 UTCEchelonGraph re-scored
  28. 2026-10-09 05:06 UTCVendor advisory
  29. 2026-10-09 05:06 UTCGHSA enrichmentGHSA-h8hr-49hh-qr69 · GitHub CVSS 4.4
  30. 2026-10-08 17:13 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  31. 2026-10-08 04:53 UTCEchelonGraph re-scored
  32. 2026-10-08 04:53 UTCVendor advisory
  33. 2026-10-08 04:53 UTCGHSA enrichmentGHSA-h8hr-49hh-qr69 · GitHub CVSS 4.4
  34. 2026-10-07 23:48 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  35. 2026-10-07 04:41 UTCEchelonGraph re-scored
  36. 2026-10-07 04:41 UTCVendor advisory
  37. 2026-10-07 04:41 UTCGHSA enrichmentGHSA-h8hr-49hh-qr69 · GitHub CVSS 4.4
  38. 2026-10-06 15:18 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  39. 2026-10-06 04:29 UTCEchelonGraph re-scored
  40. 2026-10-06 04:29 UTCVendor advisory
  41. 2026-10-06 04:29 UTCGHSA enrichmentGHSA-h8hr-49hh-qr69 · GitHub CVSS 4.4
  42. 2026-10-05 17:44 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  43. 2026-10-05 04:15 UTCEchelonGraph re-scored
  44. 2026-10-05 04:15 UTCVendor advisory
  45. 2026-10-05 04:15 UTCGHSA enrichmentGHSA-h8hr-49hh-qr69 · GitHub CVSS 4.4
  46. 2026-10-04 23:22 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  47. 2026-10-04 03:59 UTCEchelonGraph re-scored
  48. 2026-10-04 03:59 UTCVendor advisory
  49. 2026-10-04 03:59 UTCGHSA enrichmentGHSA-h8hr-49hh-qr69 · GitHub CVSS 4.4
  50. 2026-10-03 03:45 UTCEchelonGraph re-scored
  51. 2026-10-03 03:45 UTCVendor advisory
  52. 2026-10-03 03:45 UTCGHSA enrichmentGHSA-h8hr-49hh-qr69 · GitHub CVSS 4.4
  53. 2026-10-02 03:27 UTCEchelonGraph re-scored
  54. 2026-10-02 03:27 UTCVendor advisory
  55. 2026-10-02 03:27 UTCGHSA enrichmentGHSA-h8hr-49hh-qr69 · GitHub CVSS 4.4
  56. 2026-10-01 19:51 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  57. 2026-10-01 02:08 UTCEchelonGraph re-scored
  58. 2026-10-01 02:08 UTCGHSA enrichmentGHSA-h8hr-49hh-qr69 · GitHub CVSS 4.4
  59. 2026-09-30 15:04 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  60. 2026-09-30 01:51 UTCEchelonGraph re-scored
  61. 2026-09-30 01:51 UTCGHSA enrichmentGHSA-h8hr-49hh-qr69 · GitHub CVSS 4.4
  62. 2026-09-29 00:30 UTCEchelonGraph re-scored
  63. 2026-09-29 00:30 UTCGHSA enrichmentGHSA-h8hr-49hh-qr69 · GitHub CVSS 4.4
  64. 2026-09-28 13:52 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  65. 2026-09-28 00:17 UTCEchelonGraph re-scored
  66. 2026-09-28 00:17 UTCGHSA enrichmentGHSA-h8hr-49hh-qr69 · GitHub CVSS 4.4
  67. 2026-09-27 13:48 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  68. 2026-09-27 00:05 UTCEchelonGraph re-scored
  69. 2026-09-27 00:05 UTCGHSA enrichmentGHSA-h8hr-49hh-qr69 · GitHub CVSS 4.4
  70. 2026-09-26 15:59 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  71. 2026-09-25 23:52 UTCGHSA enrichmentGHSA-h8hr-49hh-qr69 · GitHub CVSS 4.4
  72. 2026-09-24 23:08 UTCEchelonGraph re-scored
  73. 2026-09-24 23:08 UTCGHSA enrichmentGHSA-h8hr-49hh-qr69 · GitHub CVSS 4.4
  74. 2026-09-24 14:04 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  75. 2026-09-23 22:17 UTCEchelonGraph re-scored

Frequently asked(5)

What is CVE-2026-88914?
CVE-2026-88914 is a medium-severity vulnerability; its CVE record was published on September 11, 2026. A flaw was found in GStreamer's gst-plugins-good isomp4 plugin. When processing a specially crafted MP4 or MOV file containing CEA-608 closed-caption data, an integer overflow in 32-bit unsigned arithmetic can bypass a bounds check in the caption parser. This leads to an out-of-bounds heap read of…
When was CVE-2026-88914 made public?
CVE-2026-88914 was made public on September 10, 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 September 11, 2026. EchelonGraph's copy of the record carries a last-modified date of November 6, 2026; the record at its source may have been updated since.
Is CVE-2026-88914 actively exploited?
CVE-2026-88914 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.1% probability of exploitation in the next 30 days (1st percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-88914?
CVE-2026-88914 has a CVSS base score of 4.4 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-88914?
A fix for CVE-2026-88914 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-88914 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

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