9.8

CVE-2026-8094: mozilla firefox Code Injection

CVSS: 9.8v3.1CriticalModified
AliasesDEBIAN-CVE-2026-8094CGA-2h86-f5jq-mv2qCGA-g458-87x6-2jp7
Published 07-05-2026Last modified 29-07-2026
Open JSON

Vulnerability summary

CVE-2026-8094 is a critical (CVSS 9.8) Code Injection vulnerability in mozilla firefox. EPSS estimates a 0.63% chance of exploitation in the next 30 days, higher than 49% 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
0.63%
0%100%
Low · +0.18 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 25 · Related 4
MGASA-2026-0145OPENSUSE-SU-2026:10720-1OPENSUSE-SU-2026:10738-1OPENSUSE-SU-2026:21168-1RHSA-2026:19160RHSA-2026:20566

Timeline

  1. 07-05-2026
    PublishedVulnerability first disclosed.
  2. 29-07-2026
    Last modifiedVulnerability information updated.

Description

Other issue in the WebRTC component. This vulnerability was fixed in Firefox ESR 140.10.2 and Thunderbird 140.10.2.

CVSS metrics

3 scores · 3 sources · 1 version

EPSS trend

Probability

0.63%

Chance of exploitation in the next 30 days

Percentile

49%

Versus all other CVEs

30-day change

+0.18 pp

From 0.45% on 19-09-2026

19-09-202619-10-2026
EPSS score
0.63%

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

Chainguard2 products
  • firefox< 140.10.2-r0
  • firefox-esr< 140.10.2-r0
Debian2 products
  • firefox-esr< 140.10.2esr-1~deb12u1 | < 140.10.2esr-1~deb13u1 | < 140.10.2esr-1
  • thunderbird< 1:140.10.2esr-1~deb12u1 | < 1:140.10.2esr-1~deb13u1 | < 1:140.10.2esr-1
Mozilla2 products
Wolfi1 product
  • firefox< 140.10.2-r0

4 vendors · 7 products

References

28 links
Show all 28 references