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CVE-2026-33170

MEDIUM

6.1

Description

Active Support is a toolkit of support libraries and Ruby core extensions extracted from the Rails framework. Prior to versions 8.1.2.1, 8.0.4.1, and 7.2.3.1, `SafeBuffer#%` does not propagate the `@html_unsafe` flag to the newly created buffer. If a `SafeBuffer` is mutated in place (e.g. via `gsub!`) and then formatted with `%` using untrusted arguments, the result incorrectly reports `html_safe? == true`, bypassing ERB auto-escaping and possibly leading to XSS. Versions 8.1.2.1, 8.0.4.1, and 7.2.3.1 contain a patch.

Details CVE

Score CVSS v3.16.1

SeveriteMEDIUM

Vecteur CVSSCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

Vecteur d'attaqueNETWORK

ComplexiteLOW

Privileges requisNONE

Interaction utilisateurREQUIRED

Publie3/24/2026

Derniere modification3/24/2026

Sourcenvd

Observations honeypot0

Produits affectes

rubyonrails:rails

Faiblesses (CWE)

CWE-79

References

https://github.com/rails/rails/commit/50d732af3b7c8aaf63cbcca0becbc00279b215b7(security-advisories@github.com)

https://github.com/rails/rails/commit/6e8a81108001d58043de9e54a06fca58962fc2db(security-advisories@github.com)

https://github.com/rails/rails/commit/c1ad0e8e1972032f3395853a5e99cea035035beb(security-advisories@github.com)

https://github.com/rails/rails/releases/tag/v7.2.3.1(security-advisories@github.com)

https://github.com/rails/rails/releases/tag/v8.0.4.1(security-advisories@github.com)

https://github.com/rails/rails/releases/tag/v8.1.2.1(security-advisories@github.com)

https://github.com/rails/rails/security/advisories/GHSA-89vf-4333-qx8v(security-advisories@github.com)

Correlations IOC

Aucune correlation enregistree

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