CVE-2026-2447

HIGHPre-NVD 8.88.8—
EchelonGraph scoreMEDIUM confidence

Score 8.8 from GitHub Security Advisory (severity: HIGH) published 2026-02-16. CISA-ADP (Vulnrichment) CVSS v3.1 baseline 8.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: cisa-adp, epss, ghsa
8.8EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 1%CVSS: 8.8Exploit: None knownExposed: 0

A fix is available — apply it.

Heap buffer overflow in libvpx. This vulnerability was fixed in Firefox 147.0.4, Firefox ESR 140.7.1, Firefox ESR 115.32.1, Thunderbird 140.7.2, and Thunderbird 147.0.2.

CVSS v3
8.8
EG Score
8.8(medium)
EG Risk
40(Track)
EG Risk 40/100SSVC: Track

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity88% × 45%
Exploitation1% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
1%
EPSS %ILE
46%
KEV
Not listed

Published

February 16, 2026

Last Modified

July 15, 2026

Advisory Details (4)

Auto-updated Jun 7, 2026
Patch available.
generic Patch Available

[SECURITY] [DLA 4489-1] libvpx security update

https://lists.debian.org/debian-lts-announce/2026/02/msg00028.html
generic

Security Vulnerabilities fixed in Thunderbird 147.0.2 and 140.7.2 — Mozilla

https://www.mozilla.org/security/advisories/mfsa2026-11/
generic

Security Vulnerabilities fixed in Firefox 147.0.4, ESR 140.7.1, and ESR 115.32.1 — Mozilla

https://www.mozilla.org/security/advisories/mfsa2026-10/
generic

2014390 - (CVE-2026-2447) Heap buffer overflow in libvpx

https://bugzilla.mozilla.org/show_bug.cgi?id=2014390

Vendor Advisories for CVE-2026-2447(20)

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

Patch Availability(30)

Vendor / EcosystemFixed in / PatchReleasedSource
redhatrhaiis/vllm-spyre-rhel9:17782445462026-05-12redhat
redhatrhaiis/model-opt-cuda-rhel9:17757498572026-04-17redhat
redhatrhaiis/vllm-cuda-rhel9:17756801922026-04-17redhat
redhatrhaiis/vllm-rocm-rhel9:17756802622026-04-17redhat
redhatlibvpx-0:1.9.0-7.el9_4.32026-03-23redhat
redhatlibvpx-0:1.9.0-7.el9_2.32026-03-23redhat
redhatlibvpx-0:1.3.0-8.el7_9.32026-03-23redhat
redhatlibvpx-0:1.9.0-7.el9_0.32026-03-23redhat
redhatlibvpx-0:1.9.0-9.el9_6.12026-03-23redhat
redhatlibvpx-0:1.14.1-3.el10_0.12026-03-23redhat
redhatlibvpx-0:1.7.0-10.el8_4.22026-03-23redhat
redhatlibvpx-0:1.7.0-10.el8_8.22026-03-23redhat
redhatlibvpx-0:1.7.0-8.el8_2.22026-03-23redhat
redhatlibvpx-0:1.7.0-10.el8_6.22026-03-23redhat
redhatlibvpx-0:1.14.1-6.el10_12026-03-16redhat
redhatlibvpx-0:1.9.0-10.el9_72026-03-12redhat
redhatthunderbird-0:140.8.0-1.el8_22026-03-12redhat
redhatthunderbird-0:140.8.0-2.el10_02026-03-11redhat
redhatfirefox-0:140.8.0-2.el9_22026-03-10redhat
redhatthunderbird-0:140.8.0-1.el8_62026-03-09redhat
redhatthunderbird-0:140.8.0-1.el9_22026-03-09redhat
redhatfirefox-0:140.8.0-2.el10_02026-03-09redhat
redhatthunderbird-0:140.8.0-1.el9_62026-03-09redhat
redhatlibvpx-0:1.7.0-13.el8_102026-03-09redhat
redhatthunderbird-0:140.8.0-2.el8_42026-03-09redhat
redhatthunderbird-0:140.8.0-1.el9_42026-03-09redhat
redhatfirefox-0:140.8.0-2.el7_92026-03-09redhat
redhatthunderbird-0:140.8.0-1.el9_02026-03-09redhat
redhatthunderbird-0:140.8.0-1.el8_82026-03-09redhat
redhatfirefox-0:140.8.0-2.el8_22026-03-02redhat

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

(12 across 4 ecosystems)
Debian:11(3)
PackageVulnerable rangeFixed inDependents
firefox-esr102.1.0esr-1 ... 91.9.1esr-1~deb9u1 (254 versions)140.8.0esr-1—
libvpx1.9.0-1, 1.9.0-1+deb11u1, 1.9.0-1+deb11u2, 1.9.0-1+deb11u3, 1.9.0-1+deb11u41.9.0-1+deb11u5—
thunderbird1:102.0.1-1 ... 1:91.9.0-1~deb9u1 (305 versions)1:140.8.0esr-1—
Debian:12(3)
PackageVulnerable rangeFixed inDependents
firefox-esr102.11.0esr-1 ... 140.8.0esr-1~deb13u1 (160 versions)140.8.0esr-1—
libvpx1.12.0-1, 1.12.0-1+deb12u1, 1.12.0-1+deb12u2, 1.12.0-1+deb12u3, 1.12.0-1+deb12u41.12.0-1+deb12u5—
thunderbird1:102.11.0-1 ... 1:140.8.0esr-1~deb13u1 (189 versions)1:140.8.0esr-1—
Debian:13(3)
PackageVulnerable rangeFixed inDependents
firefox-esr128.13.0esr-1 ... 140.8.0esr-1~deb13u1 (35 versions)140.8.0esr-1—
libvpx1.15.0-2.11.15.0-2.1+deb13u1—
thunderbird1:128.13.0esr-1 ... 1:140.8.0esr-1~deb13u1 (44 versions)1:140.8.0esr-1—
Debian:14(3)
PackageVulnerable rangeFixed inDependents
firefox-esr128.13.0esr-1 ... 140.8.0esr-1~deb13u1 (35 versions)140.8.0esr-1—
libvpx1.15.0-2.1, 1.15.2-1, 1.15.2-2, 1.16.0-1, 1.16.0-21.16.0-3—
thunderbird1:128.13.0esr-1 ... 1:140.8.0esr-1~deb13u1 (44 versions)1:140.8.0esr-1—

Weakness Classification(1)

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

Additional Vendor Advisories

(16)

Vendors that published advisories for this CVE beyond the curated set above. Broader coverage but minimal per-row detail — click through for the original advisory.

Data Freshness Timeline

(refreshed 7× in last 7d / 54× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

Showing the most recent 100 of 190 total refreshes for this CVE.

  1. 2026-08-30 19:17 UTCEPSS rescore
  2. 2026-08-30 01:22 UTCEPSS rescore
  3. 2026-08-28 21:41 UTCEPSS rescore
  4. 2026-08-27 14:25 UTCEPSS rescore
  5. 2026-08-26 14:46 UTCEPSS rescore
  6. 2026-08-25 13:49 UTCEPSS rescore
  7. 2026-08-24 14:17 UTCEPSS rescore
  8. 2026-08-23 00:19 UTCEPSS rescore
  9. 2026-08-21 23:49 UTCEPSS rescore
  10. 2026-08-20 22:55 UTCEPSS rescore
  11. 2026-08-20 22:55 UTCEPSS rescore
  12. 2026-08-19 17:03 UTCEPSS rescore
  13. 2026-08-18 13:48 UTCEPSS rescore
  14. 2026-08-17 13:47 UTCEPSS rescore
  15. 2026-08-16 14:56 UTCEPSS rescore
  16. 2026-08-16 02:14 UTCEPSS rescore
  17. 2026-08-15 01:30 UTCEPSS rescore
  18. 2026-08-14 22:29 UTCVendor advisory
  19. 2026-08-14 22:29 UTCGHSA enrichment
  20. 2026-08-14 09:57 UTCEG score recompute
  21. 2026-08-14 09:57 UTCVendor advisory
  22. 2026-08-14 09:57 UTCGHSA enrichment
  23. 2026-08-13 22:00 UTCEPSS rescore
  24. 2026-08-13 02:17 UTCEG score recompute
  25. 2026-08-13 02:17 UTCVendor advisory
Show 75 more
  1. 2026-08-13 02:17 UTCGHSA enrichment
  2. 2026-08-12 13:50 UTCEPSS rescore
  3. 2026-08-11 07:49 UTCEG score recompute
  4. 2026-08-11 07:49 UTCVendor advisory
  5. 2026-08-11 07:49 UTCGHSA enrichment
  6. 2026-08-11 00:00 UTCEPSS rescore
  7. 2026-08-10 02:32 UTCVendor advisory
  8. 2026-08-10 02:32 UTCGHSA enrichment
  9. 2026-08-09 14:25 UTCEG score recompute
  10. 2026-08-09 14:25 UTCVendor advisory
  11. 2026-08-09 14:25 UTCGHSA enrichment
  12. 2026-08-09 13:46 UTCEPSS rescore
  13. 2026-08-08 16:37 UTCEPSS rescore
  14. 2026-08-08 09:57 UTCVendor advisory
  15. 2026-08-08 09:57 UTCGHSA enrichment
  16. 2026-08-07 21:51 UTCEG score recompute
  17. 2026-08-07 21:51 UTCVendor advisory
  18. 2026-08-07 21:51 UTCGHSA enrichment
  19. 2026-08-06 13:46 UTCEPSS rescore
  20. 2026-08-06 03:42 UTCEG score recompute
  21. 2026-08-06 03:42 UTCVendor advisory
  22. 2026-08-06 03:42 UTCGHSA enrichment
  23. 2026-08-05 19:17 UTCEPSS rescore
  24. 2026-08-04 15:10 UTCEPSS rescore
  25. 2026-08-03 10:36 UTCEPSS rescore
  26. 2026-08-02 20:29 UTCEG score recompute
  27. 2026-08-02 20:29 UTCVendor advisory
  28. 2026-08-02 20:29 UTCGHSA enrichment
  29. 2026-08-02 02:26 UTCEPSS rescore
  30. 2026-08-01 04:16 UTCEPSS rescore
  31. 2026-07-30 16:27 UTCEPSS rescore
  32. 2026-07-30 01:30 UTCEPSS rescore
  33. 2026-07-28 15:36 UTCEPSS rescore
  34. 2026-07-26 14:54 UTCEPSS rescore
  35. 2026-07-26 14:54 UTCEPSS rescore
  36. 2026-07-25 14:18 UTCEPSS rescore
  37. 2026-07-25 14:17 UTCEPSS rescore
  38. 2026-07-24 14:17 UTCEPSS rescore
  39. 2026-07-23 14:18 UTCEPSS rescore
  40. 2026-07-23 14:18 UTCEPSS rescore
  41. 2026-07-23 03:07 UTCEG score recompute
  42. 2026-07-22 14:08 UTCEPSS rescore
  43. 2026-07-22 14:08 UTCEPSS rescore
  44. 2026-07-21 15:24 UTCEPSS rescore
  45. 2026-07-21 15:24 UTCEPSS rescore
  46. 2026-07-20 17:08 UTCEPSS rescore
  47. 2026-07-20 17:08 UTCEPSS rescore
  48. 2026-07-19 14:31 UTCEPSS rescore
  49. 2026-07-19 14:31 UTCEPSS rescore
  50. 2026-07-19 02:29 UTCEPSS rescore
  51. 2026-07-18 10:04 UTCEPSS rescore
  52. 2026-07-18 10:04 UTCEPSS rescore
  53. 2026-07-17 13:59 UTCOSV refresh
  54. 2026-07-16 17:03 UTCEPSS rescore
  55. 2026-07-16 17:03 UTCEPSS rescore
  56. 2026-07-15 16:57 UTCEPSS rescore
  57. 2026-07-15 16:57 UTCEPSS rescore
  58. 2026-07-15 02:00 UTCEPSS rescore
  59. 2026-07-15 02:00 UTCEPSS rescore
  60. 2026-07-13 22:30 UTCEPSS rescore
  61. 2026-07-13 06:13 UTCEPSS rescore
  62. 2026-07-13 06:13 UTCEPSS rescore
  63. 2026-07-12 05:46 UTCEPSS rescore
  64. 2026-07-11 08:27 UTCEPSS rescore
  65. 2026-07-09 19:10 UTCEPSS rescore
  66. 2026-07-08 15:15 UTCEPSS rescore
  67. 2026-07-07 13:46 UTCEPSS rescore
  68. 2026-07-06 16:27 UTCEPSS rescore
  69. 2026-07-06 16:27 UTCEPSS rescore
  70. 2026-07-06 02:23 UTCEPSS rescore
  71. 2026-07-06 02:23 UTCEPSS rescore
  72. 2026-07-05 02:30 UTCEPSS rescore
  73. 2026-07-04 06:31 UTCEPSS rescore
  74. 2026-07-01 15:06 UTCEPSS rescore
  75. 2026-06-30 23:22 UTCEPSS rescore

Related CVEs(same vendor + same CWE)

Frequently asked(5)

What is CVE-2026-2447?
CVE-2026-2447 is a high vulnerability published on February 16, 2026. Heap buffer overflow in libvpx. This vulnerability was fixed in Firefox 147.0.4, Firefox ESR 140.7.1, Firefox ESR 115.32.1, Thunderbird 140.7.2, and Thunderbird 147.0.2.
When was CVE-2026-2447 disclosed?
CVE-2026-2447 was first published in the National Vulnerability Database on February 16, 2026, with the most recent update on July 15, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-2447 actively exploited?
CVE-2026-2447 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 1% probability of exploitation in the next 30 days, which ranks it in the top 53.7% of all scored CVEs.
What is the CVSS score of CVE-2026-2447?
CVE-2026-2447 has a CVSS v3.1 base score of 8.8 (CISA-ADP / Vulnrichment enrichment; NVD's own analysis pending).
How do I remediate CVE-2026-2447?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-2447, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

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