9.8

CVE-2026-16412: mozilla firefox

CVSS: 9.8v3.1CriticalModified
AliasesUBUNTU-CVE-2026-16412DEBIAN-CVE-2026-16412CGA-7544-gmpv-2r88
Published 21-07-2026Last modified 24-07-2026
Open JSON

Vulnerability summary

CVE-2026-16412 is a critical (CVSS 9.8) vulnerability in mozilla firefox. EPSS estimates a 0.52% chance of exploitation in the next 30 days, higher than 43% of scored vulnerabilities.

Overall risk
70/100
0100
High · default modelHow is this calculated?
CVSS score
9.8/10
010
Critical · v3.1 (CVE.org)
EPSS score
0.52%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 38 · Related 16
MGASA-2026-0325MGASA-2026-0326OPENSUSE-SU-2026:11329-1OPENSUSE-SU-2026:11358-1OPENSUSE-SU-2026:11359-1OPENSUSE-SU-2026:21519-1

Timeline

  1. 21-07-2026
    PublishedVulnerability first disclosed.
  2. 24-07-2026
    Last modifiedVulnerability information updated.

Description

Memory safety bugs present in Firefox ESR 140.12 and Firefox 152. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could have been exploited to run arbitrary code. This vulnerability was fixed in Firefox 153, Firefox ESR 140.13, Thunderbird 153, and Thunderbird 140.13.

CVSS metrics

4 scores · 4 sources · 1 version

EPSS trend

Probability

0.52%

Chance of exploitation in the next 30 days

Percentile

43%

Versus all other CVEs

30-day change

0.00 pp

From 0.52% on 19-09-2026

19-09-202619-10-2026
EPSS score
0.52%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Ubuntu8 products
  • mozjs102All versions (No fix recorded)
  • mozjs115All versions (No fix recorded)
  • mozjs38All versions (No fix recorded)
  • mozjs52All versions (No fix recorded)
  • mozjs68All versions (No fix recorded)
Chainguard4 products
  • firefox< 153.0-r0
  • firefox-docker-selenium-compat< 153.0-r0
  • firefox-esr< 153.0-r0 | < 153.0-r1
  • firefox-esr-140< 140.13.0-r0
Debian2 products
  • firefox-esr< 140.13.0esr-1~deb12u1 | < 140.13.0esr-1~deb13u1 | < 140.13.0esr-1
  • thunderbird< 1:140.13.0esr-2~deb12u1 | < 1:140.13.0esr-2~deb13u1 | < 1:140.13.0esr-1
Wolfi2 products
  • firefox< 153.0-r0
  • firefox-docker-selenium-compat< 153.0-r0
Mozilla1 product
  • firefox< 153.0.0 | ≥ 140.1.0, < 140.13.0

5 vendors · 17 products

References

12 links
Show all 12 references