PatchSiren cyber security CVE debrief

CVE-2026-12325 Mozilla CVE debrief

CVE-2026-12325 is a denial-of-service vulnerability in the Graphics: ImageLib component. This issue was fixed in Firefox 152, Firefox ESR 140.12, and Firefox ESR 115.37. The vulnerability was published on [cvePublishedAt](https://www.cve.org/CVERecord?id=CVE-2026-12325) and last modified on [cveModifiedAt](https://nvd.nist.gov/vuln/detail/CVE-2026-12325).

Vendor: Mozilla
Product: Firefox
CVSS: MEDIUM 6.5
CISA KEV: Not listed in stored evidence
Original CVE published: 2026-06-16
Original CVE updated: 2026-06-17
Advisory published: 2026-06-16
Advisory updated: 2026-06-17

Who should care

Users of Firefox, Firefox ESR, and related products should apply the patches to prevent denial-of-service attacks.

Technical summary

The vulnerability is a denial-of-service issue in the Graphics: ImageLib component.

Defensive priority

high

Recommended defensive actions

Apply patches: Update to Firefox 152, Firefox ESR 140.12, or Firefox ESR 115.37.

Evidence notes

The CVE was published and last modified on the same date: 2026-06-16T13:16:33.267Z.

Sources and references

Verified primary and authoritative sources

CVE-2026-12325 CVE Program record
Publisher, destination, and source semantics verified

URL: https://www.cve.org/CVERecord?id=CVE-2026-12325

CVE Program - Official CVE Program record with source-provided CVE metadata.
CVE-2026-12325 NVD vulnerability detail
Publisher, destination, and source semantics verified

URL: https://nvd.nist.gov/vuln/detail/CVE-2026-12325

NIST National Vulnerability Database - Official NIST NVD detail page and source-specific vulnerability assessment.

Supplemental references

Source reference
Unverified legacy reference

URL: https://www.mozilla.org/security/advisories/mfsa2026-57/

[email protected]
Source reference
Unverified legacy reference

URL: https://www.mozilla.org/security/advisories/mfsa2026-58/

[email protected]
Source reference
Unverified legacy reference

URL: https://www.mozilla.org/security/advisories/mfsa2026-59/

[email protected]

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.