7.5

CVE-2026-4712: Information disclosure in the Widget: Cocoa component

Modified
AliasesUBUNTU-CVE-2026-4712DEBIAN-CVE-2026-4712CGA-m6xj-h93p-24mq
Published 24-03-2026Last modified 13-04-2026

Vulnerability summary

CVE-2026-4712 is a high (CVSS 7.5) vulnerability in mozilla firefox. EPSS estimates a 0.40% chance of exploitation in the next 30 days, higher than 34.3% of scored vulnerabilities.

Priority
Prioritisesevere

Severe, CVSS 7.5 (CVE.org); no exploitation reported by the 5 checked sources; EPSS 0% (FIRST, 03-11-2026)

Source freshness unavailable

How is this decided?
CVSS score
7.5/10
010
High · v3.1 (CVE.org)
EPSS score
0.40%
0%100%
Low · +0.01 pp in 30 days
KEVNot listedNot listed by any tracked catalog.
RansomwareNot flaggedNo ransomware use recorded.
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 35 · Related 9
MGASA-2026-0080MGASA-2026-0081OPENSUSE-SU-2026:10413-1OPENSUSE-SU-2026:10447-1OPENSUSE-SU-2026:10458-1OPENSUSE-SU-2026:20439-1

Timeline

  1. 24-03-2026
    PublishedVulnerability first disclosed.
  2. 13-04-2026
    Last modifiedVulnerability information updated.

Description

Information disclosure in the Widget: Cocoa component. This vulnerability was fixed in Firefox 149, Firefox ESR 140.9, Thunderbird 149, and Thunderbird 140.9.

CVSS metrics

4 scores · 4 sources · 1 version

EPSS trend

Probability

0.40%

Chance of exploitation in the next 30 days

Percentile

34%

Versus all other CVEs

30-day change

Increase +0.01 pp

From 0.39% on 04-10-2026

04-10-202603-11-2026

Known exploited

Compare KEV catalogs
CISA KEV

Not in the CISA KEV catalog.

ENISA CNW

Not in the ENISA CNW catalog.

CIRCL

Not in the CIRCL catalog.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Version check

Known conditions: network-reachable, no authentication, no user interaction (CVSS vector). Other conditions: not stated in public data.

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)
Chainguard2 products
  • firefox< 149.0-r0
  • firefox-esr< 140.9.0-r0
Debian2 products
  • firefox-esrAll versions (No fix recorded)
  • thunderbirdAll versions (No fix recorded)
Mozilla1 product
Wolfi1 product
  • firefox< 149.0-r0

5 vendors · 14 products

References

11 links
Show all 11 references