The Performance API did not properly hide the fact whether a request cross-origin resource has observed redirects.

published 2022-12-22 3 y ago modified 2026-06-17 4 mo ago also EUVD-2022-34225

cvss: 4.3; version 3.1, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 0.3%; EPSS 0.3% chance of exploitation in 30 days, percentile 22%
public exploits: 0; none known

The Performance API did not properly hide the fact whether a request cross-origin resource has observed redirects. This vulnerability affects Firefox < 100.

Patch / fix

fixed in 1 distros 4

Mozilla Firefox 100

ubuntu opensuse alpine arch linux

firefox Ubuntu 18.04 LTS 100.0+build2-0ubuntu0.18.04.1
firefox Ubuntu 20.04 LTS 100.0+build2-0ubuntu0.20.04.1

ubuntu advisories UBUNTU-CVE-2022-29915

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

firefox-esr openSUSE Tumbleweed 128.5.1-1.1
MozillaFirefox openSUSE Tumbleweed 100.0-1.1

opensuse advisories openSUSE-SU-2024:14572-1 openSUSE-SU-2024:12044-1

firefox Alpine 3.23, Alpine 3.22, Alpine 3.21 +5 more 100.0-r0
librewolf Alpine 3.24, Alpine 3.23, Alpine 3.22 +1 more 100.0-r0

alpine advisories ALPINE-CVE-2022-29915

Alpine secdb © Alpine Linux, from https://secdb.alpinelinux.org via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

firefox Arch Linux 100.0-1

arch linux advisories AVG-2709

CISA SSVC

Exploitation: none
Automatable: no
Technical impact: partial
Assessed: 18 mo ago (2025-04-15)

Exploit prediction

0.30% chance of exploitation in the next 30 days, higher than 22% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

bugzilla.mozilla.org https://bugzilla.mozilla.org/show_bug.cgi?id=1751678 referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by	version	score	vector
CISA ADP	3.1	4.3	CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N
NVD	3.1	4.3	CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N
CNA	3.1	4.3	CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N

Affected products

Mozilla Firefox

Classification

Weakness

CWE-346 Origin Validation Error

References

bugzilla.mozilla.org /show_bug.cgi?id=1751678
exploit, issue-tracking, vendor-advisory
mozilla.org /security/advisories/mfsa2022-16/
vendor-advisory

Sources

CVE List CVE-2022-29915
NVD CVE-2022-29915

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

Summary