CVE-2026-12329

Published Jun 16, 2026

Last updated 2 hours ago

CVSS medium 5.3

Overview

Description: Memory safety bug fixed in Thunderbird ESR 140.12. This vulnerability was fixed in Firefox ESR 140.12 and Thunderbird 140.12.
Source: security@mozilla.org
NVD status: Analyzed
Products: firefox, thunderbird

Risk scores

CVSS 3.1

Type: Secondary
Base score: 5.3
Impact score: 1.4
Exploitability score: 3.9
Vector string: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
Severity: MEDIUM

Weaknesses

134c704f-9b21-4f2e-91b3-4a467353bcc0: CWE-119

Hype score: Not currently trending

🚨*CVE* CVE-2026-12329 Memory safety bug fixed in Thunderbird ESR 140.12. This vulnerability was fixed in Firefox ESR 140.12 and Thunderbird 140.12. https://t.co/SOWiCyN3Ph ----- Traducción: CVE-2026-12329 fallo de seguridad de memoria solucionado en T… https://t.co/utmtNgl
@infoflowcloud
16 Jun 2026
10 Impressions
1 Retweet
1 Like
1 Bookmark
0 Replies
0 Quotes

Configurations

[
  {
    "nodes": [
      {
        "cpeMatch": [
          {
            "criteria": "cpe:2.3:a:mozilla:firefox:*:*:*:*:esr:*:*:*",
            "matchCriteriaId": "E539846C-B1B9-41D9-A589-F46AEF0BFCD6",
            "versionEndExcluding": "140.12.0",
            "versionStartIncluding": "140.0",
            "vulnerable": true
          },
          {
            "criteria": "cpe:2.3:a:mozilla:thunderbird:*:*:*:*:esr:*:*:*",
            "matchCriteriaId": "8CDF58C2-CD62-4DAB-9B1C-B48CE10FB31C",
            "versionEndExcluding": "140.12.0",
            "versionStartIncluding": "140.0",
            "vulnerable": true
          }
        ],
        "negate": false,
        "operator": "OR"
      }
    ]
  }
]

References

Sources include official advisories and independent security research.

Overview

Risk scores

CVSS 3.1

Weaknesses

Social media

Configurations

Related CVEs

References