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
9.8EG
EchelonGraph verdictPlan mitigationSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0.3%CVSS: 9.8Exploit: None knownExposed services: Not assessed

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

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

CVSS v3
9.8
EG Score
9.8CRITICALmedium confidence
EG Risk
59
EG Risk 59/100

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%
EPSS PROB
0.3%
EPSS %ILE
21st
KEV
Not listed

Published

June 16, 2026

Last Modified

July 15, 2026

Advisory Details (6)

Auto-updated Oct 3, 2026
No fix on record yet. 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
redhatMentions a patch (unverified)

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

2039568 - (CVE-2026-12293) GPURenderBundle externalTexture lifetime tracking bypass causes GPU-process use-after-free

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 7× in last 7d / 24× 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 414 total refreshes for this CVE.

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

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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 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 0.3% probability of exploitation in the next 30 days (21st percentile of EPSS-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?
No fix for CVE-2026-12293 is confirmed yet. Until one is published, restrict network exposure of the affected system or apply the vendor's mitigation — for example, keep it off the internet or limit it to trusted networks — and watch the vendor's advisory for the fix. The vendor advisories EchelonGraph has for CVE-2026-12293 are linked in the Vendor Advisories panel on this page.

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