CVE-2026-74948

MEDIUMPre-NVD 6.56.5—
EchelonGraph scoreMEDIUM confidence

Score 6.5 from GitHub Security Advisory published 2026-08-18. CISA-ADP (Vulnrichment) CVSS v3.1 baseline 6.5; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: cisa-adp, epss, ghsa
Trending — 4 sources updated this week
6.5EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 6.5Exploit: None knownExposed: 0

A fix is available — apply it.

Information disclosure in the Graphics component. This vulnerability was fixed in Firefox 154, Firefox ESR 115.39, Firefox ESR 140.14, Firefox ESR 153.1, Thunderbird 154, Thunderbird 140.14, and Thunderbird 153.1.

CVSS v3
6.5
EG Score
6.5(medium)
EG Risk
29(Track)
EG Risk 29/100SSVC: 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
Severity65% × 45%
Exploitation0% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
24%
KEV
Not listed

Published

August 18, 2026

Last Modified

August 24, 2026

Advisory Details (8)

Auto-updated Aug 21, 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 140.14 — Mozilla

https://www.mozilla.org/security/advisories/mfsa2026-79/
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 ESR 140.14 — Mozilla

https://www.mozilla.org/security/advisories/mfsa2026-76/
generic

Security Vulnerabilities fixed in Firefox ESR 115.39 — Mozilla

https://www.mozilla.org/security/advisories/mfsa2026-75/
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=2060106

Vendor Advisories for CVE-2026-74948(13)

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

Patch Availability(17)

Vendor / EcosystemFixed in / PatchReleasedSource
redhatthunderbird-0:140.14.0-1.el8_42026-09-09redhat
redhatthunderbird-0:140.14.0-1.el8_62026-09-09redhat
redhatfirefox-0:140.14.0-1.el9_22026-09-09redhat
redhatthunderbird-0:140.14.0-1.el8_82026-09-09redhat
redhatthunderbird-0:140.14.0-1.el10_22026-09-08redhat
redhatfirefox-0:140.14.0-1.el7_92026-09-08redhat
redhatthunderbird-0:140.14.0-1.el10_02026-09-08redhat
redhatthunderbird-0:140.14.0-1.el8_102026-09-08redhat
redhatfirefox-0:140.14.0-1.el9_62026-09-08redhat
redhatfirefox-0:140.14.0-1.el8_62026-09-08redhat
redhatfirefox-0:140.14.0-1.el8_82026-09-08redhat
redhatfirefox-0:140.14.0-1.el8_42026-09-08redhat
redhatfirefox-0:140.14.0-1.el9_42026-09-08redhat
redhatfirefox-0:140.14.0-1.el10_02026-09-08redhat
redhatfirefox-0:140.14.0-1.el10_22026-08-24redhat
redhatfirefox-0:140.14.0-1.el8_102026-08-24redhat
redhatfirefox-0:140.14.0-1.el9_82026-08-24redhat

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

(6 across 3 ecosystems)
Debian:12(2)
PackageVulnerable rangeFixed inDependents
firefox-esr102.11.0esr-1 ... 140.9.1esr-1~deb13u1 (195 versions)140.14.0esr-1~deb12u1—
thunderbird1:102.11.0-1 ... 1:140.9.1esr-1~deb13u1 (224 versions)1:140.14.0esr-1~deb12u1—
Debian:13(2)
PackageVulnerable rangeFixed inDependents
firefox-esr128.13.0esr-1 ... 140.9.1esr-1~deb13u1 (71 versions)140.14.0esr-1~deb13u1—
thunderbird1:128.13.0esr-1 ... 1:140.9.1esr-1~deb13u1 (80 versions)1:140.14.0esr-1~deb13u1—
Debian:14(2)
PackageVulnerable rangeFixed inDependents
firefox-esr128.13.0esr-1 ... 140.9.1esr-1~deb13u1 (72 versions)140.14.0esr-2—
thunderbird1:128.13.0esr-1 ... 1:140.9.1esr-1~deb13u1 (81 versions)1:140.14.0esr-1—

Weakness Classification(1)

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

Additional Vendor Advisories

(5)

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 24× in last 7d / 105× 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 113 total refreshes for this CVE.

  1. 2026-09-19 08:28 UTCEG score recompute
  2. 2026-09-19 08:28 UTCVendor advisory
  3. 2026-09-19 08:28 UTCGHSA enrichment
  4. 2026-09-18 19:28 UTCEPSS rescore
  5. 2026-09-18 06:06 UTCEG score recompute
  6. 2026-09-18 06:06 UTCVendor advisory
  7. 2026-09-18 06:06 UTCGHSA enrichment
  8. 2026-09-17 03:43 UTCEG score recompute
  9. 2026-09-17 03:43 UTCVendor advisory
  10. 2026-09-17 03:43 UTCGHSA enrichment
  11. 2026-09-16 14:08 UTCEPSS rescore
  12. 2026-09-16 05:15 UTCEPSS rescore
  13. 2026-09-16 00:19 UTCEG score recompute
  14. 2026-09-16 00:19 UTCVendor advisory
  15. 2026-09-16 00:19 UTCGHSA enrichment
  16. 2026-09-15 03:12 UTCEPSS rescore
  17. 2026-09-14 21:55 UTCVendor advisory
  18. 2026-09-14 21:55 UTCGHSA enrichment
  19. 2026-09-13 19:30 UTCEG score recompute
  20. 2026-09-13 19:30 UTCVendor advisory
  21. 2026-09-13 19:30 UTCGHSA enrichment
  22. 2026-09-12 17:07 UTCEG score recompute
  23. 2026-09-12 17:07 UTCVendor advisory
  24. 2026-09-12 17:07 UTCGHSA enrichment
  25. 2026-09-12 15:02 UTCEPSS rescore
Show 75 more
  1. 2026-09-11 14:53 UTCEPSS rescore
  2. 2026-09-11 14:44 UTCEG score recompute
  3. 2026-09-11 14:44 UTCVendor advisory
  4. 2026-09-11 14:44 UTCGHSA enrichment
  5. 2026-09-10 12:21 UTCEG score recompute
  6. 2026-09-10 12:21 UTCVendor advisory
  7. 2026-09-10 12:21 UTCGHSA enrichment
  8. 2026-09-10 09:35 UTCEPSS rescore
  9. 2026-09-09 09:26 UTCEG score recompute
  10. 2026-09-09 09:26 UTCVendor advisory
  11. 2026-09-09 09:26 UTCGHSA enrichment
  12. 2026-09-08 22:01 UTCEPSS rescore
  13. 2026-09-08 07:03 UTCEG score recompute
  14. 2026-09-08 07:03 UTCVendor advisory
  15. 2026-09-08 07:02 UTCGHSA enrichment
  16. 2026-09-07 04:39 UTCEG score recompute
  17. 2026-09-07 04:39 UTCVendor advisory
  18. 2026-09-07 04:39 UTCGHSA enrichment
  19. 2026-09-06 13:48 UTCEPSS rescore
  20. 2026-09-06 00:16 UTCEG score recompute
  21. 2026-09-06 00:16 UTCVendor advisory
  22. 2026-09-06 00:16 UTCGHSA enrichment
  23. 2026-09-04 21:53 UTCEG score recompute
  24. 2026-09-04 21:53 UTCVendor advisory
  25. 2026-09-04 21:53 UTCGHSA enrichment
  26. 2026-09-04 05:07 UTCEPSS rescore
  27. 2026-09-03 19:17 UTCVendor advisory
  28. 2026-09-03 19:17 UTCGHSA enrichment
  29. 2026-09-02 16:53 UTCEG score recompute
  30. 2026-09-02 16:53 UTCVendor advisory
  31. 2026-09-02 16:52 UTCGHSA enrichment
  32. 2026-09-02 14:12 UTCEPSS rescore
  33. 2026-09-01 13:54 UTCEPSS rescore
  34. 2026-09-01 12:00 UTCEG score recompute
  35. 2026-09-01 12:00 UTCVendor advisory
  36. 2026-09-01 12:00 UTCGHSA enrichment
  37. 2026-09-01 04:40 UTCEPSS rescore
  38. 2026-09-01 04:40 UTCEPSS rescore
  39. 2026-08-31 09:32 UTCEG score recompute
  40. 2026-08-31 09:32 UTCVendor advisory
  41. 2026-08-31 09:32 UTCGHSA enrichment
  42. 2026-08-30 19:18 UTCEPSS rescore
  43. 2026-08-30 19:17 UTCEPSS rescore
  44. 2026-08-30 07:09 UTCEG score recompute
  45. 2026-08-30 07:09 UTCVendor advisory
  46. 2026-08-30 07:09 UTCGHSA enrichment
  47. 2026-08-30 01:22 UTCEPSS rescore
  48. 2026-08-29 04:43 UTCEG score recompute
  49. 2026-08-29 04:43 UTCVendor advisory
  50. 2026-08-29 04:43 UTCGHSA enrichment
  51. 2026-08-28 21:42 UTCEPSS rescore
  52. 2026-08-27 23:11 UTCEG score recompute
  53. 2026-08-27 23:11 UTCVendor advisory
  54. 2026-08-27 23:11 UTCGHSA enrichment
  55. 2026-08-27 14:25 UTCEPSS rescore
  56. 2026-08-26 20:49 UTCEG score recompute
  57. 2026-08-26 20:49 UTCVendor advisory
  58. 2026-08-26 20:49 UTCGHSA enrichment
  59. 2026-08-26 14:47 UTCEPSS rescore
  60. 2026-08-25 18:19 UTCEG score recompute
  61. 2026-08-25 18:19 UTCVendor advisory
  62. 2026-08-25 18:19 UTCGHSA enrichment
  63. 2026-08-25 13:49 UTCEPSS rescore
  64. 2026-08-24 15:56 UTCEG score recompute
  65. 2026-08-24 15:56 UTCVendor advisory
  66. 2026-08-24 15:56 UTCGHSA enrichment
  67. 2026-08-24 14:18 UTCEPSS rescore
  68. 2026-08-24 02:11 UTCEG score recompute
  69. 2026-08-24 02:11 UTCGHSA enrichment
  70. 2026-08-23 00:19 UTCEPSS rescore
  71. 2026-08-22 23:48 UTCEG score recompute
  72. 2026-08-22 23:48 UTCGHSA enrichment
  73. 2026-08-21 23:49 UTCEPSS rescore
  74. 2026-08-21 21:25 UTCGHSA enrichment
  75. 2026-08-21 20:19 UTCEG score recompute▲ 6.50

Frequently asked(5)

What is CVE-2026-74948?
CVE-2026-74948 is a medium vulnerability published on August 18, 2026. Information disclosure in the Graphics component. This vulnerability was fixed in Firefox 154, Firefox ESR 115.39, Firefox ESR 140.14, Firefox ESR 153.1, Thunderbird 154, Thunderbird 140.14, and Thunderbird 153.1.
When was CVE-2026-74948 disclosed?
CVE-2026-74948 was first published in the National Vulnerability Database on August 18, 2026, with the most recent update on August 24, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-74948 actively exploited?
CVE-2026-74948 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 75.5% of all scored CVEs.
What is the CVSS score of CVE-2026-74948?
CVE-2026-74948 has a CVSS v3.1 base score of 6.5 (CISA-ADP / Vulnrichment enrichment; NVD's own analysis pending).
How do I remediate CVE-2026-74948?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-74948, 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-2026-74948

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