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Vulnerability · Published Apr 28, 2026 · Assigned by mozilla

CVE-2026-7320Information disclosure due to incorrect boundary conditions in the Audio/Video component

High 7.5

In plain English

A high-severity memory corruption in Firefox from Mozilla. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 25% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)7.5High
Exploit odds (30 days)0.3%top 74.5% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known

Official description

Information disclosure due to incorrect boundary conditions in the Audio/Video component. This vulnerability was fixed in Firefox 150.0.1, Firefox ESR 140.10.1, Firefox ESR 115.35.1, Thunderbird 150.0.1, and Thunderbird 140.10.1.

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
AlmaLinux:10firefox140.10.1-1.el10_2ALSA-2026:19157
AlmaLinux:8firefox140.10.1-1.el8_10.alma.1ALSA-2026:19588
AlmaLinux:9firefox140.10.1-1.el9_8.alma.1ALSA-2026:19370
AlmaLinux:9firefox-x11140.10.1-1.el9_8.alma.1ALSA-2026:19370
AlmaLinux:10thunderbird140.10.1-1.el10_2.alma.1ALSA-2026:19153
AlmaLinux:8thunderbird140.10.1-1.el8_10.alma.1ALSA-2026:20586
AlmaLinux:9thunderbird140.10.1-1.el9_8.alma.1ALSA-2026:19348
Debian:12firefox-esr140.10.1esr-1~deb12u1DEBIAN-CVE-2026-7320
Debian:13firefox-esr140.10.1esr-1~deb13u1DEBIAN-CVE-2026-7320
Debian:14firefox-esr140.10.1esr-1DEBIAN-CVE-2026-7320
Debian:12thunderbird1:140.10.1esr-1~deb12u1DEBIAN-CVE-2026-7320
Debian:13thunderbird1:140.10.1esr-1~deb13u1DEBIAN-CVE-2026-7320
Debian:14thunderbird1:140.10.1esr-1DEBIAN-CVE-2026-7320
Rocky Linux:8firefox0:140.10.1-1.el8_10RLSA-2026:19588
Rocky Linux:9firefox0:140.10.1-1.el9_8RLSA-2026:19370
Rocky Linux:10thunderbird0:140.10.1-1.el10_2RLSA-2026:19153
Rocky Linux:8thunderbird0:140.10.1-1.el8_10RLSA-2026:20586
Rocky Linux:9thunderbird0:140.10.1-1.el9_8RLSA-2026:19348
Ubuntu:22.04:LTSmozjs102no fix listedUBUNTU-CVE-2026-7320
Ubuntu:24.04:LTSmozjs102no fix listedUBUNTU-CVE-2026-7320
Ubuntu:24.04:LTSmozjs115no fix listedUBUNTU-CVE-2026-7320
Ubuntu:22.04:LTSmozjs78no fix listedUBUNTU-CVE-2026-7320
Ubuntu:22.04:LTSmozjs91no fix listedUBUNTU-CVE-2026-7320
Ubuntu:22.04:LTSthunderbirdno fix listedUBUNTU-CVE-2026-7320

Affected products (as reported)

VendorProductVersions
Mozilla Firefox see references
Mozilla Thunderbird see references

Weakness: CWE-119, CWE-125 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

References