CVE-2026-12310

HIGHPre-NVD 7.57.5—Trending — 4 sources updated this week

7.5

Memory safety bug fixed in Firefox 152. This vulnerability was fixed in Firefox 152, Firefox ESR 140.12, Thunderbird 152, and Thunderbird 140.12.

CVSS v3: 7.5
EG Score: 7.5(high)
EPSS: 16.2%
KEV: Not listed

Published

June 16, 2026

Last Modified

June 18, 2026

Advisory Details (5)

Auto-updated Jun 16, 2026

No patch confirmed yet.

generic

Security Vulnerabilities fixed in Thunderbird 140.12 — Mozilla

https://www.mozilla.org/security/advisories/mfsa2026-61/

generic

Security Vulnerabilities fixed in Thunderbird 152 — Mozilla

https://www.mozilla.org/security/advisories/mfsa2026-60/

generic

Security Vulnerabilities fixed in Firefox ESR 140.12 — Mozilla

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

generic

Security Vulnerabilities fixed in Firefox 152 — Mozilla

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

generic

Access Denied

https://bugzilla.mozilla.org/show_bug.cgi?id=2039707

Vendor Advisories for CVE-2026-12310(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

GHSA-9652-j9gr-w3mm
GitHub Security AdvisoriesHigh
Memory safety bug fixed in Firefox 152. This vulnerability was fixed in Firefox 152 and Firefox...

Weakness Classification(4)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 22× in last 7d / 22× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

2026-06-21 18:20 UTCEG score recompute
2026-06-21 18:20 UTCGHSA enrichment
2026-06-21 14:56 UTCEPSS rescore
2026-06-21 14:56 UTCEPSS rescore
2026-06-21 06:49 UTCEG score recompute
2026-06-21 06:49 UTCGHSA enrichment
2026-06-21 01:59 UTCEPSS rescore
2026-06-21 01:59 UTCEPSS rescore
2026-06-20 19:30 UTCEG score recompute
2026-06-20 19:30 UTCGHSA enrichment
2026-06-20 08:13 UTCEG score recompute
2026-06-20 08:13 UTCGHSA enrichment
2026-06-19 20:54 UTCEG score recompute
2026-06-19 20:54 UTCGHSA enrichment
2026-06-19 19:25 UTCEPSS rescore
2026-06-19 09:36 UTCEG score recompute▲ 7.50
2026-06-19 09:36 UTCGHSA enrichment
2026-06-18 17:52 UTCEPSS rescore
2026-06-17 17:53 UTCEPSS rescore
2026-06-16 21:07 UTCNVD updateCVSS v3 → 7.5 · severity → HIGH
2026-06-16 13:47 UTCEG score recompute
2026-06-16 13:46 UTCNVD updatefirst tracked

Frequently asked(5)

What is CVE-2026-12310?

CVE-2026-12310 is a high vulnerability published on June 16, 2026. Memory safety bug fixed in Firefox 152. This vulnerability was fixed in Firefox 152, Firefox ESR 140.12, Thunderbird 152, and Thunderbird 140.12.

When was CVE-2026-12310 disclosed?

CVE-2026-12310 was first published in the National Vulnerability Database on June 16, 2026, with the most recent update on June 18, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.

Is CVE-2026-12310 actively exploited?

CVE-2026-12310 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 16.2% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.

What is the CVSS score of CVE-2026-12310?

CVE-2026-12310 has a CVSS v3.1 base score of 7.5 (CISA-ADP / Vulnrichment enrichment; NVD's own analysis pending).

How do I remediate CVE-2026-12310?

Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-12310, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

Explore the affected products and dependency analysis for CVE-2026-12310

Explore →

Is Your Infrastructure Affected by CVE-2026-12310?

EchelonGraph automatically scans your cloud infrastructure and maps CVE exposure using blast radius analysis.

Start Free Scan →Browse All CVEs

CVE-2026-12310

📅 Published

🔄 Last Modified

📋 Advisory Details (5)

Security Vulnerabilities fixed in Thunderbird 140.12 — Mozilla

Security Vulnerabilities fixed in Thunderbird 152 — Mozilla

Security Vulnerabilities fixed in Firefox ESR 140.12 — Mozilla

Security Vulnerabilities fixed in Firefox 152 — Mozilla

Access Denied

📣 Vendor Advisories for CVE-2026-12310(1)

Weakness Classification(4)

Data Freshness Timeline

❓ Frequently asked(5)

Dependency Blast Radius

Is Your Infrastructure Affected by CVE-2026-12310?

🔗 Related CVEs(same CWE)

Same CWE

Published

Last Modified

Advisory Details (5)

Vendor Advisories for CVE-2026-12310(1)

Frequently asked(5)

Related CVEs(same CWE)