CVE-2022-31736

CRITICALNVD 9.89.8—
EchelonGraph scoreMEDIUM confidence

Score 9.8 from GitHub Security Advisory (severity: CRITICAL) published 2022-12-22. NVD baseline CVSS 9.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
9.8
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 1%CVSS: 9.8Exploit: NoneExposed: 0

A fix is available — apply it.

A malicious website could have learned the size of a cross-origin resource that supported Range requests. This vulnerability affects Thunderbird < 91.10, Firefox < 101, and Firefox ESR < 91.10.

CVSS v3
9.8
EG Score
9.8(medium)
EPSS
60.4%
KEV
Not listed

Published

December 22, 2022

Last Modified

April 15, 2025

Advisory Details (4)

Auto-updated Jul 8, 2026
No patch confirmed yet.
generic

Security Vulnerabilities fixed in Thunderbird 91.10 — Mozilla

https://www.mozilla.org/security/advisories/mfsa2022-22/
generic

Security Vulnerabilities fixed in Firefox ESR 91.10 — Mozilla

https://www.mozilla.org/security/advisories/mfsa2022-21/
generic

Security Vulnerabilities fixed in Firefox 101 — Mozilla

https://www.mozilla.org/security/advisories/mfsa2022-20/
generic

1735923 - (CVE-2022-31736) Leaking size of cross-origin resources by using Range Requests and Service Workers

https://bugzilla.mozilla.org/show_bug.cgi?id=1735923

Vendor Advisories for CVE-2022-31736(2)

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

Patch Availability(14)

Vendor / EcosystemFixed in / PatchReleasedSource
ubuntufirefox-locale-ast (101.0.1+build1-0ubuntu0.20.04.1) @ focal2026-05-25ubuntu
ubuntuthunderbird-locale-id (1:91.11.0+build2-0ubuntu0.22.04.1) @ jammy2026-05-25ubuntu
redhatthunderbird-0:91.10.0-1.el8_12022-06-03redhat
redhatthunderbird-0:91.10.0-1.el8_22022-06-03redhat
redhatthunderbird-0:91.10.0-1.el9_02022-06-03redhat
redhatthunderbird-0:91.10.0-1.el7_92022-06-03redhat
redhatthunderbird-0:91.10.0-1.el8_62022-06-03redhat
redhatthunderbird-0:91.10.0-1.el8_42022-06-02redhat
redhatfirefox-0:91.10.0-1.el9_02022-06-01redhat
redhatfirefox-0:91.10.0-1.el8_12022-06-01redhat
redhatfirefox-0:91.10.0-1.el8_62022-06-01redhat
redhatfirefox-0:91.10.0-1.el8_22022-06-01redhat
redhatfirefox-0:91.10.0-1.el7_92022-06-01redhat
redhatfirefox-0:91.10.0-1.el8_42022-06-01redhat

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.

Weakness Classification(1)

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

Additional Vendor Advisories

(12)

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 11× in last 7d / 45× 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.

  1. 2026-07-11 08:25 UTCEPSS rescore
  2. 2026-07-11 08:25 UTCEPSS rescore
  3. 2026-07-09 19:07 UTCEPSS rescore
  4. 2026-07-08 15:12 UTCEPSS rescore
  5. 2026-07-07 13:44 UTCEPSS rescore
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  8. 2026-07-06 02:21 UTCEPSS rescore
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  10. 2026-07-05 02:28 UTCEPSS rescore
  11. 2026-07-05 02:28 UTCEPSS rescore
  12. 2026-07-04 06:29 UTCEPSS rescore
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  14. 2026-07-01 15:04 UTCEPSS rescore
  15. 2026-06-30 23:20 UTCEPSS rescore
  16. 2026-06-30 23:20 UTCEPSS rescore
  17. 2026-06-28 14:06 UTCEPSS rescore
  18. 2026-06-28 10:49 UTCOSV refresh
  19. 2026-06-28 04:54 UTCEPSS rescore
  20. 2026-06-27 03:07 UTCEPSS rescore
  21. 2026-06-25 13:48 UTCEPSS rescore
  22. 2026-06-25 13:48 UTCEPSS rescore
  23. 2026-06-24 14:03 UTCEPSS rescore
  24. 2026-06-24 14:03 UTCEPSS rescore
  25. 2026-06-23 21:31 UTCEPSS rescore
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  1. 2026-06-23 21:31 UTCEPSS rescore
  2. 2026-06-22 14:24 UTCEPSS rescore
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  4. 2026-06-21 14:55 UTCEPSS rescore
  5. 2026-06-21 14:55 UTCEPSS rescore
  6. 2026-06-21 01:58 UTCEPSS rescore
  7. 2026-06-21 01:58 UTCEPSS rescore
  8. 2026-06-19 19:24 UTCEPSS rescore
  9. 2026-06-19 19:24 UTCEPSS rescore
  10. 2026-06-18 17:51 UTCEPSS rescore
  11. 2026-06-18 17:51 UTCEPSS rescore
  12. 2026-06-17 17:51 UTCEPSS rescore
  13. 2026-06-17 17:51 UTCEPSS rescore
  14. 2026-06-16 17:51 UTCEPSS rescore
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  16. 2026-06-15 17:46 UTCEPSS rescore
  17. 2026-06-14 23:15 UTCEPSS rescore
  18. 2026-06-13 22:58 UTCEPSS rescore
  19. 2026-06-12 23:10 UTCEPSS rescore
  20. 2026-06-12 23:10 UTCEPSS rescore
  21. 2026-06-11 13:58 UTCEPSS rescore
  22. 2026-06-11 13:58 UTCEPSS rescore
  23. 2026-06-10 22:16 UTCEPSS rescore
  24. 2026-06-10 21:17 UTCOSV refresh
  25. 2026-06-10 13:20 UTCEPSS rescore
  26. 2026-06-08 14:15 UTCEPSS rescore
  27. 2026-06-08 14:15 UTCEPSS rescore
  28. 2026-06-07 15:23 UTCEPSS rescore
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  30. 2026-06-07 15:23 UTCEPSS rescore
  31. 2026-06-06 13:46 UTCEPSS rescore
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  35. 2026-06-05 06:09 UTCEPSS rescore
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  37. 2026-06-04 13:11 UTCEPSS rescore
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  39. 2026-06-02 20:11 UTCEPSS rescore
  40. 2026-06-02 20:11 UTCEPSS rescore
  41. 2026-06-02 20:11 UTCEPSS rescore
  42. 2026-06-01 13:50 UTCEPSS rescore
  43. 2026-06-01 13:50 UTCEPSS rescore
  44. 2026-05-31 22:29 UTCEPSS rescore
  45. 2026-05-31 22:29 UTCEPSS rescore
  46. 2026-05-31 22:29 UTCEPSS rescore
  47. 2026-05-31 00:15 UTCEPSS rescore
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  49. 2026-05-29 13:43 UTCEPSS rescore
  50. 2026-05-29 13:42 UTCEPSS rescore
  51. 2026-05-28 13:43 UTCEPSS rescore
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  54. 2026-05-27 13:39 UTCEPSS rescore
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  56. 2026-05-26 13:43 UTCEPSS rescore
  57. 2026-05-26 07:17 UTCEPSS rescore
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  59. 2026-05-26 07:17 UTCEPSS rescore
  60. 2026-05-25 10:00 UTCEG score recompute
  61. 2026-05-25 10:00 UTCVendor advisory
  62. 2026-05-25 10:00 UTCGHSA enrichment
  63. 2026-05-24 16:51 UTCEPSS rescore

Frequently asked(5)

What is CVE-2022-31736?
CVE-2022-31736 is a critical vulnerability published on December 22, 2022. A malicious website could have learned the size of a cross-origin resource that supported Range requests. This vulnerability affects Thunderbird < 91.10, Firefox < 101, and Firefox ESR < 91.10.
When was CVE-2022-31736 disclosed?
CVE-2022-31736 was first published in the National Vulnerability Database on December 22, 2022, with the most recent update on April 15, 2025. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2022-31736 actively exploited?
CVE-2022-31736 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 60.4% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2022-31736?
CVE-2022-31736 has a CVSS v3 base score of 9.8 (NVD).
How do I remediate CVE-2022-31736?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2022-31736, 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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