CVE-2026-6767
published 2026-04-21CVE-2026-6767: Other issue in the Libraries component in NSS. This vulnerability was fixed in Firefox 150, Firefox ESR 115.35, Firefox ESR 140.10, Thunderbird 150, and…
PriorityP427medium5.3CVSS 3.1
AVNACLPRNUINSUCLINAN
EPSS
0.23%
13.6th percentile
Other issue in the Libraries component in NSS. This vulnerability was fixed in Firefox 150, Firefox ESR 115.35, Firefox ESR 140.10, Thunderbird 150, and Thunderbird 140.10.
Affected
11 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| mozilla | firefox | < Firefox 150 | Firefox 150 |
| mozilla | firefox | < 115.35.0 | 115.35.0 |
| mozilla | firefox | < 150.0 | 150.0 |
| mozilla | firefox | — | — |
| mozilla | firefox | >= 140.0 < 140.10.0 | 140.10.0 |
| mozilla | firefox_esr | < Firefox ESR 140.10 | Firefox ESR 140.10 |
| mozilla | firefox_esr | < Firefox ESR 115.35 | Firefox ESR 115.35 |
| mozilla | thunderbird | < Thunderbird 150 | Thunderbird 150 |
| mozilla | thunderbird | < Thunderbird 140.10 | Thunderbird 140.10 |
| mozilla | thunderbird | >= 140.0 < 140.10.0 | 140.10.0 |
| rhel10 | firefox-flatpak | — | — |
CVSS provenance
nvdv3.15.3MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
vendor_redhat5.3MEDIUM
Stop checking back — get the weekly exploitation signal.
Every Monday: what got weaponized or added to CISA KEV in the last seven days — each CVE cross-linked to its PoC, Nuclei template, and detection rule. Free, one email a week, unsubscribe in one click.
Red Hat
firefox: Other issue in the Libraries component in NSS
vendor_redhat·2026-04-21·CVSS 5.3
CVE-2026-6767 [MEDIUM] CWE-676 firefox: Other issue in the Libraries component in NSS
firefox: Other issue in the Libraries component in NSS
A flaw was found in Firefox. The Mozilla Foundation's Security Advisory describes the following issue:
Other issue in the Libraries component in NSS
Statement: Red Hat Product Security rates the severity of this flaw as determined by the Mozilla Foundation Security Advisory.
Package: firefox (Red Hat Enterprise Linux 10) - Affected
Package: rhel10/firefox-flatpak (Red Hat Enterprise Linux 10) - Affected
Package: firefox (Red Hat Enterprise Linux 6) - Out of support scope
Package: firefox (Red Hat Enterprise Linux 7) - Affected
Package: firefox (Red Hat Enterprise Linux 8) - Affected
Package: firefox (Red Hat Enterprise Linux 9) - Affected
Mozilla
Mozilla Foundation Security Advisory 2026-32: CVE-2026-6767
vendor_mozilla·CVSS 5.3
CVE-2026-6767 [MEDIUM] Mozilla Foundation Security Advisory 2026-32: CVE-2026-6767
Mozilla Foundation Security Advisory 2026-32
CVE: CVE-2026-6767
Product: Firefox ESR
Impact: high
Fixed in: Firefox ESR 140.10
Mozilla
Mozilla Foundation Security Advisory 2026-33: CVE-2026-6767
vendor_mozilla·CVSS 5.3
CVE-2026-6767 [MEDIUM] Mozilla Foundation Security Advisory 2026-33: CVE-2026-6767
Mozilla Foundation Security Advisory 2026-33
CVE: CVE-2026-6767
Product: Thunderbird
Impact: high
Fixed in: Thunderbird 150
Mozilla
Mozilla Foundation Security Advisory 2026-30: CVE-2026-6767
vendor_mozilla·CVSS 5.3
CVE-2026-6767 [MEDIUM] Mozilla Foundation Security Advisory 2026-30: CVE-2026-6767
Mozilla Foundation Security Advisory 2026-30
CVE: CVE-2026-6767
Product: Firefox
Impact: high
Fixed in: Firefox 150
Mozilla
Mozilla Foundation Security Advisory 2026-34: CVE-2026-6767
vendor_mozilla·CVSS 5.3
CVE-2026-6767 [MEDIUM] Mozilla Foundation Security Advisory 2026-34: CVE-2026-6767
Mozilla Foundation Security Advisory 2026-34
CVE: CVE-2026-6767
Product: Thunderbird
Impact: high
Fixed in: Thunderbird 140.10
Mozilla
Mozilla Foundation Security Advisory 2026-31: CVE-2026-6767
vendor_mozilla·CVSS 5.3
CVE-2026-6767 [MEDIUM] Mozilla Foundation Security Advisory 2026-31: CVE-2026-6767
Mozilla Foundation Security Advisory 2026-31
CVE: CVE-2026-6767
Product: Firefox ESR
Impact: high
Fixed in: Firefox ESR 115.35
VulDB
Mozilla Firefox up to 149 NSS Remote Code Execution (Nessus ID 310350)
vuldb·2026-04-26·CVSS 5.3
CVE-2026-6767 [MEDIUM] Mozilla Firefox up to 149 NSS Remote Code Execution (Nessus ID 310350)
A vulnerability labeled as critical has been found in Mozilla Firefox up to 149. This impacts an unknown function of the component NSS. Such manipulation leads to Remote Code Execution.
This vulnerability is documented as CVE-2026-6767. The attack can be executed remotely. There is not any exploit available.
The affected component should be upgraded.
GHSA
GHSA-38r2-pp9w-hfh6: Other issue in the Libraries component in NSS
ghsa_unreviewed·2026-04-21
CVE-2026-6767 [MEDIUM] CWE-119 GHSA-38r2-pp9w-hfh6: Other issue in the Libraries component in NSS
Other issue in the Libraries component in NSS. This vulnerability was fixed in Firefox 150, Firefox ESR 115.35, and Firefox ESR 140.10.
No detection rules found.
No public exploits indexed.
https://bugzilla.mozilla.org/show_bug.cgi?id=2023209https://www.mozilla.org/security/advisories/mfsa2026-30/https://www.mozilla.org/security/advisories/mfsa2026-31/https://www.mozilla.org/security/advisories/mfsa2026-32/https://www.mozilla.org/security/advisories/mfsa2026-33/https://www.mozilla.org/security/advisories/mfsa2026-34/
2026-04-21
Published