Vulnerability · Published Oct 20, 2026 · Assigned by mozilla
CVE-2026-113470Cryptographic issue in the Security Block-lists, Allow-lists, and other State component
Medium 5.4
In plain English
A medium-severity improper certificate validation 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 0.5% (higher than 40% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Severity (CVSS 3.1)5.4Medium
Exploit odds (30 days)0.5%top 60.0% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official description
Cryptographic issue in the Security Block-lists, Allow-lists, and other State component. This vulnerability was fixed in Firefox 158.0.1, Firefox ESR 153.5.1, Firefox ESR 115.43.1, Thunderbird 158.0.1, Thunderbird 153.5.1, and Firefox 158.0.2.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian:12 | firefox-esr | 153.5.1esr-1~deb12u1 | DEBIAN-CVE-2026-113470 |
| Debian:13 | firefox-esr | 153.5.1esr-1~deb13u1 | DEBIAN-CVE-2026-113470 |
| Debian:14 | firefox-esr | 153.5.1esr-1 | DEBIAN-CVE-2026-113470 |
| Debian:12 | thunderbird | 1:153.5.1esr-1~deb12u1 | DEBIAN-CVE-2026-113470 |
| Debian:13 | thunderbird | 1:153.5.1esr-1~deb13u1 | DEBIAN-CVE-2026-113470 |
| Debian:14 | thunderbird | no fix listed | DEBIAN-CVE-2026-113470 |
| Ubuntu:22.04:LTS | mozjs102 | no fix listed | UBUNTU-CVE-2026-113470 |
| Ubuntu:24.04:LTS | mozjs102 | no fix listed | UBUNTU-CVE-2026-113470 |
| Ubuntu:24.04:LTS | mozjs115 | no fix listed | UBUNTU-CVE-2026-113470 |
| Ubuntu:22.04:LTS | mozjs78 | no fix listed | UBUNTU-CVE-2026-113470 |
| Ubuntu:22.04:LTS | mozjs91 | no fix listed | UBUNTU-CVE-2026-113470 |
| Ubuntu:22.04:LTS | thunderbird | no fix listed | UBUNTU-CVE-2026-113470 |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Mozilla | Firefox | see references |
| Mozilla | Thunderbird | see references |
Weakness: CWE-295 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N
References
- https://bugzilla.mozilla.org/show_bug.cgi?id=2084311
- https://www.mozilla.org/security/advisories/mfsa2026-111/
- https://www.mozilla.org/security/advisories/mfsa2026-112/
- https://www.mozilla.org/security/advisories/mfsa2026-113/
- https://www.mozilla.org/security/advisories/mfsa2026-114/
- https://www.mozilla.org/security/advisories/mfsa2026-115/
- https://www.mozilla.org/security/advisories/mfsa2026-116/
- http://www.openwall.com/lists/oss-security/2026/10/20/30
- https://lists.debian.org/debian-lts-announce/2026/10/msg00041.html