VDB
CVE-2026-39823
CVE-2026-39823
PUBLISHED
CVSS 9.300000190734863 CRITICAL
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.
EPSS 0.01% · 1.2th percentile
Risk Scores
CVSS v4.0
9.300000190734863
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N
EPSS Score
0.01%
1.2th percentile
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Go standard library | html/template | 0, 1.26.0-0 |
Timeline
- May 7, 2026 CVE Published
- May 7, 2026 PoC Published
- May 8, 2026 Security Advisory
- May 8, 2026 CVE Updated
- May 18, 2026 EPSS Score
- May 19, 2026 EPSS Score
- May 20, 2026 EPSS Score
- May 21, 2026 EPSS Score
- May 22, 2026 EPSS Score
- May 23, 2026 EPSS Score
- May 24, 2026 EPSS Score
- May 25, 2026 EPSS Score