CVE-2026-27142Actions which insert URLs into the content attribute of HTML meta tags are not escaped.
Updated under an hour ago ()
Does this affect you?
It affects golang go. Add what you run to find out whether that includes you.
No exploitation reported and no EPSS estimate yet.
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Actions which insert URLs into the content attribute of HTML meta tags are not escaped. This can allow XSS if the meta tag also has an http-equiv attribute with the value "refresh". A new GODEBUG setting has been added, htmlmetacontenturlescape, which can be used to disable escaping URLs in actions in the meta content attribute which follow "url=" by setting htmlmetacontenturlescape=0.
- CVSS
- 6.1 MEDIUM (v3.1, NVD)CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
- Weakness (CWE)
- CWE-79
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Not given
- NVD analysis
- Analyzed
- Record last updated
- Jun 17, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
golang go golang:go | before 1.25.8; 1.26.0 | NVD |
References
- https://go.dev/cl/752081mailing-list
- https://go.dev/issue/77954issue-tracking
- https://groups.google.com/g/golang-announce/c/EdhZqrQ98hkrelease-notes
- https://pkg.go.dev/vuln/GO-2026-4603vendor-advisory
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.