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Critical severity9.1NVD Advisory· Published Aug 18, 2026· Updated Aug 20, 2026

CVE-2026-74961

CVE-2026-74961

Description

Side-channel in the Web Audio component. This vulnerability was fixed in Firefox 154, Firefox ESR 153.1, Thunderbird 154, and Thunderbird 153.1.

AI Insight

LLM-synthesized narrative grounded in this CVE's description and references.

Affected products

9

osv-coords7 versions
pkg:rpm/opensuse/mozilla-nspr&distro=openSUSE%20Leap%2016.0 pkg:rpm/opensuse/firefox-esr&distro=openSUSE%20Tumbleweed pkg:rpm/opensuse/MozillaFirefox&distro=openSUSE%20Leap%2016.0 pkg:rpm/opensuse/MozillaFirefox&distro=openSUSE%20Tumbleweed pkg:rpm/opensuse/mozilla-nss&distro=openSUSE%20Leap%2016.0 pkg:rpm/opensuse/rust-cbindgen&distro=openSUSE%20Leap%2016.0 pkg:apk/chainguard/firefox-esr-140
< 4.39-160000.1.1+ 6 more
- (no CPE)range: < 4.39-160000.1.1
- (no CPE)range: < 153.1.0-1.1
- (no CPE)range: < 153.1.0-160000.1.2
- (no CPE)range: < 154.0-1.1
- (no CPE)range: < 3.125-160000.1.1
- (no CPE)range: < 0.29.4+git0-160000.1.1
- (no CPE)range: < 140.14.0-r0
Mozilla Corporation/Firefoxllm-fuzzy
Range: >=154
Mozilla Corporation/Thunderbirdllm-fuzzy
Range: >=154

Patches

Vulnerability mechanics

References

5

www.mozilla.org/security/advisories/mfsa2026-74/nvdVendor Advisory
www.mozilla.org/security/advisories/mfsa2026-77/nvdVendor Advisory
www.mozilla.org/security/advisories/mfsa2026-78/nvdVendor Advisory
www.mozilla.org/security/advisories/mfsa2026-80/nvdVendor Advisory
bugzilla.mozilla.org/show_bug.cginvdPermissions Required

News mentions

1

Mozilla Thunderbird: 25 Vulnerabilities Disclosed, Ranging from Critical to Medium Severity
Vypr Intelligence · Aug 18, 2026