CVE-2022-31736

CRITICALNVD 9.89.8—

9.8

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: 43.9%
KEV: Not listed

Published

December 22, 2022

Last Modified

April 15, 2025

References (8)

security@mozillahttps://bugzilla.mozilla.org/show_bug.cgi?id=1735923
security@mozillahttps://www.mozilla.org/security/advisories/mfsa2022-20/
security@mozillahttps://www.mozilla.org/security/advisories/mfsa2022-21/
security@mozillahttps://www.mozilla.org/security/advisories/mfsa2022-22/
af854a3a-2127-422b-91ae-364da2661108https://bugzilla.mozilla.org/show_bug.cgi?id=1735923
af854a3a-2127-422b-91ae-364da2661108https://www.mozilla.org/security/advisories/mfsa2022-20/
af854a3a-2127-422b-91ae-364da2661108https://www.mozilla.org/security/advisories/mfsa2022-21/
af854a3a-2127-422b-91ae-364da2661108https://www.mozilla.org/security/advisories/mfsa2022-22/

Patch Availability(14)

Vendor / Ecosystem	Fixed in / Patch	Released	Source
ubuntu	firefox-locale-ast (101.0.1+build1-0ubuntu0.20.04.1) @ focal	2026-05-25	ubuntu
ubuntu	thunderbird-locale-id (1:91.11.0+build2-0ubuntu0.22.04.1) @ jammy	2026-05-25	ubuntu
redhat	thunderbird-0:91.10.0-1.el8_1	2022-06-03	redhat
redhat	thunderbird-0:91.10.0-1.el8_2	2022-06-03	redhat
redhat	thunderbird-0:91.10.0-1.el9_0	2022-06-03	redhat
redhat	thunderbird-0:91.10.0-1.el7_9	2022-06-03	redhat
redhat	thunderbird-0:91.10.0-1.el8_6	2022-06-03	redhat
redhat	thunderbird-0:91.10.0-1.el8_4	2022-06-02	redhat
redhat	firefox-0:91.10.0-1.el9_0	2022-06-01	redhat
redhat	firefox-0:91.10.0-1.el8_1	2022-06-01	redhat
redhat	firefox-0:91.10.0-1.el8_6	2022-06-01	redhat
redhat	firefox-0:91.10.0-1.el8_2	2022-06-01	redhat
redhat	firefox-0:91.10.0-1.el7_9	2022-06-01	redhat
redhat	firefox-0:91.10.0-1.el8_4	2022-06-01	redhat

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.

CWE-942Permissive Cross-domain Policy with Untrusted Domains

All Vendor Advisories

(14)

Every vendor that published an advisory referencing this CVE — pulled from our cve_vendor_advisories aggregation. Click any row for the vendor's original advisory page.

Data Freshness Timeline

(refreshed 10× in last 7d / 10× in last 30d)

Every time one of our enrichment pipelines (NVD, MITRE cvelistV5, EPSS, CISA KEV, GHSA, OSV, vendor advisories) ran against this CVE. Most recent first.

2026-05-27 13:39 UTCepss_batch
2026-05-27 13:39 UTCepss_batch
2026-05-26 13:43 UTCepss_batch
2026-05-26 07:17 UTCepss_batch
2026-05-26 07:17 UTCepss_batch
2026-05-26 07:17 UTCepss_batch
2026-05-25 10:00 UTCEG score recompute
2026-05-25 10:00 UTCVendor advisory
2026-05-25 10:00 UTCGHSA enrichment
2026-05-24 16:51 UTCepss_batch

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 43.9% 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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