RCE in Golang Go
CVE-2023-29400
Templates containing actions in unquoted HTML attributes (e.g. "attr={{.}}") executed with empty input can result in output with unexpected results when parsed due to HTML normalization rules. This may allow injection of arbitrary attributes into tags.
EPSS: 0.010 (60.4th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 7.3 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L.
Affected products
- Golang Go
- Go Standard Library Html/template — versions 0, 1.20.0-0
Weakness classification (CWE)
Public proof-of-concept exploits
References
- security@golang.org (Patch, Issue Tracking)
- security@golang.org (Patch)
- security@golang.org (Mailing List, Release Notes)
- security@golang.org (Vendor Advisory)
- af854a3a-2127-422b-91ae-364da2661108
Frequently asked questions
- What is CVE-2023-29400?
- CVE-2023-29400 is a high-severity vulnerability in Golang Go, classified under Improper Neutralization of Special Elements in Output Used by a Downstream Component (Injection). CVSS score: 7.3/10. Published 2023-05-11.
- How severe is CVE-2023-29400?
- High severity. CVSS v3 base score is 7.3 out of 10.
- Is CVE-2023-29400 known to be exploited?
- 6 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.