CVE-2026-34231: Slippers Vulnerable to Cross-Site Scripting (XSS) in `attrs` Template Tag

March 30, 2026 (updated March 31, 2026)

A Cross-site Scripting (XSS) vulnerability exists in the {% attrs %} template tag of the slippers Django package. When a context variable containing untrusted data is passed to {% attrs %}, the value is interpolated into an HTML attribute string without escaping, allowing an attacker to break out of the attribute context and inject arbitrary HTML or JavaScript into the rendered page.

References

github.com/advisories/GHSA-w7rv-gfp4-j9j3
github.com/mixxorz/slippers
github.com/mixxorz/slippers/commit/16cc4ef4fa8ad2f7aee30798f16c3e7b653423b2
github.com/mixxorz/slippers/releases/tag/0.6.3
github.com/mixxorz/slippers/security/advisories/GHSA-w7rv-gfp4-j9j3
nvd.nist.gov/vuln/detail/CVE-2026-34231

Code Behaviors & Features

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