4.3

CVE-2026-12320: mozilla firefox

CVSS: 4.3v3.1MediumAnalyzed
AliasesUBUNTU-CVE-2026-12320CGA-rh3q-qhq4-g8vhCGA-xpmq-32x3-2gf4
Published 16-06-2026Last modified 16-06-2026
Open JSON

Vulnerability summary

CVE-2026-12320 is a medium (CVSS 4.3) vulnerability in mozilla firefox. EPSS estimates a 0.18% chance of exploitation in the next 30 days, higher than 7% of scored vulnerabilities.

Overall risk
17/100
0100
Low · default modelHow is this calculated?
CVSS score
4.3/10
010
Medium · v3.1 (CVE.org)
EPSS score
0.18%
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 2 · Related 3
OPENSUSE-SU-2026:11052-1OPENSUSE-SU-2026:11373-1CGA-P7MQ-PPW3-R7PC

Timeline

  1. 16-06-2026
    PublishedVulnerability first disclosed.
  2. 16-06-2026
    Last modifiedVulnerability information updated.

Description

Information disclosure in the Password Manager component. This vulnerability was fixed in Firefox 152 and Thunderbird 152.

CVSS metrics

3 scores · 3 sources · 1 version

EPSS trend

Probability

0.18%

Chance of exploitation in the next 30 days

Percentile

7%

Versus all other CVEs

30-day change

0.00 pp

From 0.18% on 22-09-2026

22-09-202622-10-2026
EPSS score
0.18%

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)
Mozilla2 products
Chainguard1 product
  • firefox< 152.0.1-r0
Wolfi1 product
  • firefox< 152.0.1-r0

4 vendors · 12 products

References

6 links