CVE-2026-57989: Origin validation error in Microsoft Edge (Chromium-based) allows an unauthorized attacker to disclose information over a network.

highCVSS 7.4CVE-2026-57989

Origin validation error in Microsoft Edge (Chromium-based) allows an unauthorized attacker to disclose information over a network.

Details

Source: NVD Recent CVEs (US · database · site)
Severity: high — CVSS 7.4
Published: 2026-07-26
Last updated: 2026-07-27
Exploitation: Not in CISA KEV at last sync

Original advisory: https://nvd.nist.gov/vuln/detail/CVE-2026-57989

Exploitation outlook

EPSS (FIRST.org) estimates each CVE’s probability of exploitation in the next 30 days — here is the CSIRTS.com read on those numbers.

Low exploitation riskCVE-2026-579890.44% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 36% of all scored CVEs.

Referenced CVEs

CVE	CSIRTS overview	External
CVE-2026-57989	coverage & exploitation status	NVD · CVE.org

Same CVEs, other sources

How other CERTs, PSIRTs and databases cover the vulnerabilities in this advisory.

unknownMicrosoft security advisory (AV26-747)cccs
medium[NEW] [medium] Microsoft Edge: Multiple vulnerabilities allow information disclosure and spoofing attackscert-bund
unknownMicrosoft Edge Multiple Vulnerabilitieshkcert
unknownMultiple vulnerabilities in Microsoft Edge (July 27, 2026)cert-fr-avis
highCVE-2026-57989: Microsoft Edge (Chromium-based) Information Disclosure Vulnerabilitymsrc

Recent advisories for Origin validation error

A cluster of recent advisories against the same product widens the attack surface — attackers routinely chain freshly published CVEs on one product, so review these together.

highCVE-2026-6102: MSI Center NTIOLib_X64 Origin Validation Error Local Privilege Escalation Vulnerability. This v…nvd · 2026-07-29
mediumCVE-2026-57978: Origin validation error in Microsoft Edge (Chromium-based) allows an unauthorized attacker to …nvd · 2026-07-26
highCVE-2026-56181: Origin validation error in Windows Network Address Translation (NAT) allows an unauthorized at…nvd · 2026-07-14
mediumGHSA-36w4-95hv-5vwg: gun_http2 has an Origin Validation Error vulnerabilityghsa · 2026-06-08
criticalexploitedCVE-2025-34291: Langflow Origin Validation Error Vulnerabilitycisa-kev · 2026-05-21