CVE-2026-12297

CRITICALPre-NVD 9.69.6—
EchelonGraph scoreMEDIUM confidence

Score 9.6 from GitHub Security Advisory (severity: CRITICAL) published 2026-06-16. CISA-ADP (Vulnrichment) CVSS v3.1 baseline 9.6; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: cisa-adp, epss, ghsa
Trending — 4 sources updated this week
9.6EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 9.6Exploit: None knownExposed: 0

A fix is available — apply it.

Sandbox escape due to incorrect boundary conditions in the Networking component. This vulnerability was fixed in Firefox 152, Firefox ESR 140.12, Firefox ESR 115.37, Thunderbird 152, and Thunderbird 140.12.

CVSS v3
9.6
EG Score
9.6(medium)
EG Risk
43(Track)
EG Risk 43/100SSVC: 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
Severity96% × 45%
Exploitation0% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
32%
KEV
Not listed

Published

June 16, 2026

Last Modified

July 15, 2026

Advisory Details (10)

Auto-updated Aug 23, 2026
Patch available. Sources: redhat.
redhat Patch Available

Affected: Red Hat Enterprise Linux 9.

https://access.redhat.com/errata/RHSA-2026:29940
redhat Patch Available

Affected: Red Hat Enterprise Linux 9.

https://access.redhat.com/errata/RHSA-2026:27734
redhat Patch Available

Affected: Red Hat Enterprise Linux 10.

https://access.redhat.com/errata/RHSA-2026:27733
redhat Patch Available

Affected: Red Hat Enterprise Linux 8.

https://access.redhat.com/errata/RHSA-2026:27717
generic

Security Vulnerabilities fixed in Thunderbird 140.12 — Mozilla

https://www.mozilla.org/security/advisories/mfsa2026-61/
generic

Security Vulnerabilities fixed in Thunderbird 152 — Mozilla

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

Security Vulnerabilities fixed in Firefox ESR 115.37 — Mozilla

https://www.mozilla.org/security/advisories/mfsa2026-59/
generic

Security Vulnerabilities fixed in Firefox ESR 140.12 — Mozilla

https://www.mozilla.org/security/advisories/mfsa2026-58/
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=2041610

Vendor Advisories for CVE-2026-12297(20)

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

Patch Availability(21)

Vendor / EcosystemFixed in / PatchReleasedSource
redhatthunderbird-0:140.12.0-1.el9_22026-07-15redhat
redhatthunderbird-0:140.12.0-1.el8_42026-07-14redhat
redhatthunderbird-0:140.12.0-1.el8_62026-07-14redhat
redhatthunderbird-0:140.12.0-1.el8_82026-07-14redhat
redhatfirefox-0:140.12.0-1.el9_42026-07-13redhat
redhatthunderbird-0:140.12.0-1.el9_42026-07-13redhat
redhatthunderbird-0:140.12.0-1.el9_62026-07-13redhat
redhatthunderbird-0:140.12.0-1.el10_02026-07-13redhat
redhatfirefox-0:140.12.0-1.el7_92026-07-13redhat
redhatfirefox-0:140.12.0-1.el8_62026-07-09redhat
redhatfirefox-0:140.12.0-1.el9_62026-07-09redhat
redhatfirefox-0:140.12.0-1.el8_42026-07-07redhat
redhatfirefox-0:140.12.0-1.el10_02026-07-07redhat
redhatfirefox-0:140.12.0-1.el9_22026-07-07redhat
redhatfirefox-0:140.12.0-1.el8_82026-07-07redhat
redhatthunderbird-0:140.12.0-1.el8_102026-06-30redhat
redhatthunderbird-0:140.12.0-1.el10_22026-06-29redhat
redhatthunderbird-0:140.12.0-1.el9_82026-06-25redhat
redhatfirefox-0:140.12.0-1.el8_102026-06-22redhat
redhatfirefox-0:140.12.0-1.el10_22026-06-22redhat
redhatfirefox-0:140.12.0-1.el9_82026-06-22redhat

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

(8 across 4 ecosystems)
Debian:11(2)
PackageVulnerable rangeFixed inDependents
firefox-esr102.1.0esr-1 ... 91.9.1esr-1~deb9u1 (279 versions)140.12.0esr-1~deb11u1—
thunderbird1:102.0.1-1 ... 1:91.9.0-1~deb9u1 (330 versions)1:140.12.0esr-1~deb11u1—
Debian:12(2)
PackageVulnerable rangeFixed inDependents
firefox-esr102.11.0esr-1 ... 140.9.1esr-1~deb13u1 (186 versions)140.12.0esr-1~deb12u1—
thunderbird1:102.11.0-1 ... 1:140.9.1esr-1~deb13u1 (215 versions)1:140.12.0esr-1~deb12u1—
Debian:13(2)
PackageVulnerable rangeFixed inDependents
firefox-esr128.13.0esr-1 ... 140.9.1esr-1~deb13u1 (62 versions)140.12.0esr-1~deb13u1—
thunderbird1:128.13.0esr-1 ... 1:140.9.1esr-1~deb13u1 (71 versions)1:140.12.0esr-1~deb13u1—
Debian:14(2)
PackageVulnerable rangeFixed inDependents
firefox-esr128.13.0esr-1 ... 140.9.1esr-1~deb13u1 (63 versions)140.12.0esr-1—
thunderbird1:128.13.0esr-1 ... 1:140.9.1esr-1~deb13u1 (72 versions)1:140.12.0esr-1—

Weakness Classification(2)

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

Additional Vendor Advisories

(1)

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 42× in last 7d / 289× 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 614 total refreshes for this CVE.

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

Related CVEs(same vendor + same CWE)

Frequently asked(5)

What is CVE-2026-12297?
CVE-2026-12297 is a critical vulnerability published on June 16, 2026. Sandbox escape due to incorrect boundary conditions in the Networking component. This vulnerability was fixed in Firefox 152, Firefox ESR 140.12, Firefox ESR 115.37, Thunderbird 152, and Thunderbird 140.12.
When was CVE-2026-12297 disclosed?
CVE-2026-12297 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-2026-12297 actively exploited?
CVE-2026-12297 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 67.9% of all scored CVEs.
What is the CVSS score of CVE-2026-12297?
CVE-2026-12297 has a CVSS v3.1 base score of 9.6 (CISA-ADP / Vulnrichment enrichment; NVD's own analysis pending).
How do I remediate CVE-2026-12297?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-12297, 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

See which npm, PyPI, Go, and Maven packages are affected by CVE-2026-12297

Explore →

Is Your Infrastructure Affected by CVE-2026-12297?

EchelonGraph automatically scans your cloud infrastructure and maps CVE exposure using blast radius analysis.

Start Free Scan →Browse All CVEs