CVE-2026-12293

CRITICALNVD 9.89.8—
EchelonGraph scoreMEDIUM confidence

Score 9.8 from GitHub Security Advisory (severity: CRITICAL) published 2026-06-16. NVD baseline CVSS 9.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
Trending — 3 sources updated this week
9.8EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 9.8Exploit: None knownExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

Use-after-free in the Graphics: WebGPU component. This vulnerability was fixed in Firefox 152 and Thunderbird 152.

CVSS v3
9.8
EG Score
9.8(medium)
EG Risk
59(Track)
EG Risk 59/100SSVC: 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
Severity98% × 45%
Exploitation0% × 40%
Automatability100% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
22%
KEV
Not listed

Published

June 16, 2026

Last Modified

July 15, 2026

Advisory Details (6)

Auto-updated Aug 22, 2026
Patch available. Sources: redhat.
redhat

Affected: Red Hat Enterprise Linux 10",

https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-12293.json
redhat

2489216 – (CVE-2026-12293) CVE-2026-12293 firefox: thunderbird: Use-after-free in the Graphics: WebGPU component

https://bugzilla.redhat.com/show_bug.cgi?id=2489216
redhat Patch Available

CVE-2026-12293 - 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-2026-12293
generic

Security Vulnerabilities fixed in Thunderbird 152 — Mozilla

https://www.mozilla.org/security/advisories/mfsa2026-60/
generic

Security Vulnerabilities fixed in Firefox 152 — Mozilla

https://www.mozilla.org/security/advisories/mfsa2026-57/
generic

Access Denied

https://bugzilla.mozilla.org/show_bug.cgi?id=2039568

Vendor Advisories for CVE-2026-12293(1)

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

Weakness Classification(2)

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

Data Freshness Timeline

(refreshed 29× in last 7d / 177× 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 377 total refreshes for this CVE.

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

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-12293?
CVE-2026-12293 is a critical vulnerability published on June 16, 2026. Use-after-free in the Graphics: WebGPU component. This vulnerability was fixed in Firefox 152 and Thunderbird 152.
When was CVE-2026-12293 disclosed?
CVE-2026-12293 was first published in the National Vulnerability Database on June 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-2026-12293 actively exploited?
CVE-2026-12293 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0% probability of exploitation in the next 30 days, which ranks it in the top 77.7% of all scored CVEs.
What is the CVSS score of CVE-2026-12293?
CVE-2026-12293 has a CVSS v3 base score of 9.8 (NVD).
How do I remediate CVE-2026-12293?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-12293, 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.

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