CVE-2022-1802

HIGHNVD 8.88.8—
EchelonGraph scoreMEDIUM confidence

Score 8.8 from GitHub Security Advisory (severity: HIGH) published 2022-12-22. NVD baseline CVSS 8.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
Elevated
8.8EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 27%CVSS: 8.8Exploit: Elevated riskExposed: 0

A fix is available — apply it.

If an attacker was able to corrupt the methods of an Array object in JavaScript via prototype pollution, they could have achieved execution of attacker-controlled JavaScript code in a privileged context. This vulnerability affects Firefox ESR < 91.9.1, Firefox < 100.0.2, Firefox for Android < 100.3.0, and Thunderbird < 91.9.1.

CVSS v3
8.8
EG Score
8.8(medium)
EG Risk
56(Track*)
EG Risk 56/100SSVC: 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
Severity88% × 45%
Exploitation40% × 40%
Automatability0% × 15%
Action: Watch closely — could escalate to Attend.
EPSS PROB
27%
EPSS %ILE
98%
KEV
Not listed

Published

December 22, 2022

Last Modified

April 16, 2025

Advisory Details (2)

Auto-updated Aug 22, 2026
No patch confirmed yet.
generic

1770137 - (CVE-2022-1802) Spot fix for pwn2own-2022 sandbox escape

https://bugzilla.mozilla.org/show_bug.cgi?id=1770137
generic

Security Vulnerabilities fixed in Firefox 100.0.2, Firefox for Android 100.3.0, Firefox ESR 91.9.1, Thunderbird 91.9.1 — Mozilla

https://www.mozilla.org/security/advisories/mfsa2022-19/

Vendor Advisories for CVE-2022-1802(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
ubuntuthunderbird-locale-mk (1:91.9.1+build1-0ubuntu0.20.04.1) @ focal2026-05-25ubuntu
ubuntufirefox-locale-ast (100.0.2+build1-0ubuntu0.21.10.1) @ impish2026-05-25ubuntu
redhatthunderbird-0:91.9.1-1.el9_02022-05-27redhat
redhatthunderbird-0:91.9.1-1.el8_62022-05-27redhat
redhatfirefox-0:91.9.1-1.el8_62022-05-27redhat
redhatfirefox-0:91.9.1-1.el8_12022-05-27redhat
redhatthunderbird-0:91.9.1-1.el8_12022-05-27redhat
redhatfirefox-0:91.9.1-1.el8_22022-05-27redhat
redhatthunderbird-0:91.9.1-1.el8_42022-05-27redhat
redhatfirefox-0:91.9.1-1.el9_02022-05-27redhat
redhatfirefox-0:91.9.1-1.el8_42022-05-27redhat
redhatthunderbird-0:91.9.1-1.el8_22022-05-26redhat
redhatthunderbird-0:91.9.1-1.el7_92022-05-24redhat
redhatfirefox-0:91.9.1-1.el7_92022-05-24redhat

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

(12 across 6 ecosystems)
Debian:10(2)
PackageVulnerable rangeFixed inDependents
firefox-esr60.7.2esr-1 ... 91.9.1esr-1~deb9u1 (150 versions)91.9.1esr-1~deb10u1—
thunderbird1:60.7.2-1 ... 1:91.9.0-1~deb9u1 (188 versions)1:91.10.0-1~deb10u1—
Debian:11(2)
PackageVulnerable rangeFixed inDependents
firefox-esr78.12.0esr-1 ... 91.9.1esr-1~deb9u1 (48 versions)91.9.1esr-1~deb11u1—
thunderbird1:78.12.0-1 ... 1:91.9.0-1~deb9u1 (65 versions)1:91.10.0-1~deb11u1—
Debian:12(2)
PackageVulnerable rangeFixed inDependents
firefox-esr—91.9.1esr-1—
thunderbird—1:91.10.0-1—
Debian:13(2)
PackageVulnerable rangeFixed inDependents
firefox-esr—91.9.1esr-1—
thunderbird—1:91.10.0-1—
Debian:14(2)
PackageVulnerable rangeFixed inDependents
firefox-esr—91.9.1esr-1—
thunderbird—1:91.10.0-1—
Debian:9(2)
PackageVulnerable rangeFixed inDependents
firefox-esr45.9.0esr-1 ... 91.9.0esr-1~deb9u1 (257 versions)91.9.1esr-1~deb9u1—
thunderbird1.5-4 ... 1:91.9.0-1~deb9u1 (269 versions)1:91.10.0-1~deb9u1—

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 7× in last 7d / 27× 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 133 total refreshes for this CVE.

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

Publicly available exploits

(1 reference)

Working exploit code is in the public domain (1 GitHub PoC). Defenders should treat patch urgency accordingly — public PoCs typically lead to mass-exploitation within 24-72 hours.

Frequently asked(5)

What is CVE-2022-1802?
CVE-2022-1802 is a high vulnerability published on December 22, 2022. If an attacker was able to corrupt the methods of an Array object in JavaScript via prototype pollution, they could have achieved execution of attacker-controlled JavaScript code in a privileged context. This vulnerability affects Firefox ESR < 91.9.1, Firefox < 100.0.2, Firefox for Android <…
When was CVE-2022-1802 disclosed?
CVE-2022-1802 was first published in the National Vulnerability Database on December 22, 2022, with the most recent update on April 16, 2025. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2022-1802 actively exploited?
CVE-2022-1802 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 27% probability of exploitation in the next 30 days, which ranks it in the top 2.1% of all scored CVEs.
What is the CVSS score of CVE-2022-1802?
CVE-2022-1802 has a CVSS v3 base score of 8.8 (NVD).
How do I remediate CVE-2022-1802?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2022-1802, 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-2022-1802

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