Cross-site Scripting (XSS) The advisory has been revoked - it doesn't affect any version of package python-pep517.src (opens in a new tab)
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-RHEL10-PYTHONPEP517SRC-15247404
- published7 Feb 2026
- disclosed12 Dec 2025
Introduced: 12 Dec 2025
CVE-2025-67724 (opens in a new tab)Amendment
The Red Hat security team deemed this advisory irrelevant for RHEL:10.
NVD Description
Note: Versions mentioned in the description apply only to the upstream python-pep517.src package and not the python-pep517.src package as distributed by RHEL.
Tornado is a Python web framework and asynchronous networking library. In versions 6.5.2 and below, the supplied reason phrase is used unescaped in HTTP headers (where it could be used for header injection) or in HTML in the default error page (where it could be used for XSS) and can be exploited by passing untrusted or malicious data into the reason argument. Used by both RequestHandler.set_status and tornado.web.HTTPError, the argument is designed to allow applications to pass custom "reason" phrases (the "Not Found" in HTTP/1.1 404 Not Found) to the HTTP status line (mainly for non-standard status codes). This issue is fixed in version 6.5.3.
References
- https://bugzilla.redhat.com/show_bug.cgi?id=2421719
- https://access.redhat.com/security/cve/CVE-2025-67724
- https://github.com/tornadoweb/tornado/commit/9c163aebeaad9e6e7d28bac1f33580eb00b0e421
- https://github.com/tornadoweb/tornado/releases/tag/v6.5.3
- https://github.com/tornadoweb/tornado/security/advisories/GHSA-pr2v-jx2c-wg9f