CVE-2025-12909

MEDIUMNVD 5.35.3—Trending — 3 sources updated this week

5.3

Insufficient policy enforcement in Devtools in Google Chrome prior to 140.0.7339.80 allowed a remote attacker to leak cross-origin data via Devtools. (Chromium security severity: Low)

CVSS v3: 5.3
EG Score: 5.3(medium)
EPSS: 14.1%
KEV: Not listed

Published

November 8, 2025

Last Modified

November 21, 2025

References (2)

chrome-cve-admin@googlehttps://chromereleases.googleblog.com/2025/09/stable-channel-update-for-desktop.html
chrome-cve-admin@googlehttps://issues.chromium.org/issues/361116749

Weakness Classification(1)

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

CWE-693Protection Mechanism Failure

Data Freshness Timeline

(refreshed 11× in last 7d / 11× in last 30d)

Every time one of our enrichment pipelines (NVD, MITRE cvelistV5, EPSS, CISA KEV, GHSA, OSV, vendor advisories) ran against this CVE. Most recent first.

2026-06-02 20:12 UTCepss_batch
2026-06-02 20:12 UTCepss_batch
2026-06-01 13:51 UTCepss_batch
2026-06-01 13:51 UTCepss_batch
2026-05-31 22:30 UTCepss_batch
2026-05-31 22:30 UTCepss_batch
2026-05-31 00:16 UTCepss_batch
2026-05-31 00:16 UTCepss_batch
2026-05-29 19:36 UTCEG score recompute
2026-05-29 19:36 UTCGHSA enrichment
2026-05-29 13:44 UTCepss_batch

Frequently asked(5)

What is CVE-2025-12909?

CVE-2025-12909 is a medium vulnerability published on November 8, 2025. Insufficient policy enforcement in Devtools in Google Chrome prior to 140.0.7339.80 allowed a remote attacker to leak cross-origin data via Devtools. (Chromium security severity: Low)

When was CVE-2025-12909 disclosed?

CVE-2025-12909 was first published in the National Vulnerability Database on November 8, 2025, with the most recent update on November 21, 2025. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.

Is CVE-2025-12909 actively exploited?

CVE-2025-12909 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 14.1% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.

What is the CVSS score of CVE-2025-12909?

CVE-2025-12909 has a CVSS v3 base score of 5.3 (NVD).

How do I remediate CVE-2025-12909?

Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2025-12909, 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

See which npm, PyPI, Go, and Maven packages are affected by CVE-2025-12909

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CVE-2025-12909

📅 Published

🔄 Last Modified

🔗 References (2)

Weakness Classification(1)

Data Freshness Timeline

❓ Frequently asked(5)

Dependency Blast Radius

Is Your Infrastructure Affected by CVE-2025-12909?

🔗 Related CVEs(same CWE)

Same CWE

Published

Last Modified

References (2)

Frequently asked(5)

Related CVEs(same CWE)