CVE-2022-32149 — An attacker may cause a denial of service by crafting an Accept-Language header

An attacker may cause a denial of service by crafting an Accept-Language header which ParseAcceptLanguage will take significant time to parse.

01What is this vulnerability?

An attacker may cause a denial of service by crafting an Accept-Language header which ParseAcceptLanguage will take significant time to parse.

02Affected products

Vendor	Product	Versions
golang.org	x/text / golang.org/x/text/language	0

03Active exploitation status

Not currently listed on the CISA Known Exploited Vulnerabilities (KEV) catalog. EPSS is the best forward-looking signal — see the EPSS row above.

04Recommended remediation

• Patch to a fixed version listed in the vendor advisory (see references below).
• Mitigate with WAF rules, network egress filters, or feature flags where the patch is not yet available.
• Hunt historical logs for exploitation indicators — see Detection signatures below.

05Technical details

For the full vendor write-up, exploit chains, and reference implementations, see the references list in section 09.

06Detection signatures

Ask SARA in chat to draft a starting detection for this CVE in your stack of choice.

07Related CVEs

No directly-cited follow-up CVEs in the KB record for this advisory. The references list in section 09 carries the vendor cross-references.

08Timeline

• Published: 2022-10-14T00:00:00.000Z
• Last modified: 2025-05-15T20:35:11.868Z

09References

• go.dev — https://go.dev/issue/56152
• go.dev — https://go.dev/cl/442235
• groups.google.com — https://groups.google.com/g/golang-announce/c/-hjNw559_tE/m/KlGTfid5CAAJ
• pkg.go.dev — https://pkg.go.dev/vuln/GO-2022-1059