CVE-2026-39823

CVE-2026-39823 is a medium vulnerability published on May 7, 2026. CVE-2026-27142 fixed a vulnerability in which URLs were not correctly escaped inside of a <meta> tag's <content> attribute. If the URL content were to insert ASCII whitespaces around the '=' rune inside of the <content> attribute, the escaper would fail to similarly escape it, leading to XSS.

CVE-2026-39823 was first published in the National Vulnerability Database on May 7, 2026, with the most recent update on May 13, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.

CVE-2026-39823 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 1.2% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.

CVE-2026-39823 has a CVSS v3 base score of 6.1 (NVD).

Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-39823, 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.