CVE-2026-74958

HIGHPre-NVD 7.57.5—
EchelonGraph scoreMEDIUM confidence

Score 7.5 from GitHub Security Advisory (severity: HIGH) published 2026-08-18. CISA-ADP (Vulnrichment) CVSS v3.1 baseline 7.5; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: cisa-adp, epss, ghsa
Trending — 3 sources updated this week
7.5EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 7.5Exploit: None knownExposed: 0

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

Information disclosure in the WebRTC component. This vulnerability was fixed in Firefox 154, Firefox ESR 153.1, Thunderbird 154, and Thunderbird 153.1.

CVSS v3
7.5
EG Score
7.5(medium)
EG Risk
49(Track)
EG Risk 49/100SSVC: 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
Severity75% × 45%
Exploitation0% × 40%
Automatability100% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
19%
KEV
Not listed

Published

August 18, 2026

Last Modified

August 19, 2026

Advisory Details (5)

Auto-updated Aug 18, 2026
No patch confirmed yet.
generic

Security Vulnerabilities fixed in Thunderbird 153.1 — Mozilla

https://www.mozilla.org/security/advisories/mfsa2026-80/
generic

Security Vulnerabilities fixed in Thunderbird 154 — Mozilla

https://www.mozilla.org/security/advisories/mfsa2026-78/
generic

Security Vulnerabilities fixed in Firefox ESR 153.1 — Mozilla

https://www.mozilla.org/security/advisories/mfsa2026-77/
generic

Security Vulnerabilities fixed in Firefox 154 — Mozilla

https://www.mozilla.org/security/advisories/mfsa2026-74/
generic

Access Denied

https://bugzilla.mozilla.org/show_bug.cgi?id=2045368

Vendor Advisories for CVE-2026-74958(1)

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

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 24× in last 7d / 109× 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 127 total refreshes for this CVE.

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

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-74958?
CVE-2026-74958 is a high vulnerability published on August 18, 2026. Information disclosure in the WebRTC component. This vulnerability was fixed in Firefox 154, Firefox ESR 153.1, Thunderbird 154, and Thunderbird 153.1.
When was CVE-2026-74958 disclosed?
CVE-2026-74958 was first published in the National Vulnerability Database on August 18, 2026, with the most recent update on August 19, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-74958 actively exploited?
CVE-2026-74958 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 81.4% of all scored CVEs.
What is the CVSS score of CVE-2026-74958?
CVE-2026-74958 has a CVSS v3.1 base score of 7.5 (CISA-ADP / Vulnrichment enrichment; NVD's own analysis pending).
How do I remediate CVE-2026-74958?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-74958, 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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