CVE-2025-67724

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.

Database specific

{
    "cwe_ids": [
        "CWE-644",
        "CWE-79"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/67xxx/CVE-2025-67724.json",
    "cna_assigner": "GitHub_M"
}

References

Affected packages

Git / github.com/tornadoweb/tornado

Affected ranges

Type: GIT
Repo: https://github.com/tornadoweb/tornado
Events: Introduced

0 Unknown introduced commit / All previous commits are affected

Fixed

38014ddb51520ff7762c1d55535925dba2cdbe31

Affected versions

v1.*

v1.0.0

v1.1.0

v1.1.1

v1.2.0

v1.2.1

v2.*

v2.0.0

v2.1.0

v2.1.1

v2.2.0

v2.2.1

v2.3.0

v2.4.0

v2.4.1

v3.*

v3.0.0

v3.0.1

v3.0.2

v3.1.0

v3.1.1

v3.2.0

v3.2.0b1

v3.2.0b2

v3.2.1

v3.2.2

v4.*

v4.0.0

v4.0.0b1

v4.0.0b2

v4.0.0b3

v4.0.1

v4.0.2

v4.1.0

v4.1.0b1

v4.1.0b2

v4.2.0

v4.2.0b1

v4.2.1

v4.3.0

v4.3.0b1

v4.3.0b2

v4.4.0

v4.4.0b1

v4.4.1

v4.4.2

v4.4.3

v4.5.0

v4.5.1

v4.5.2

v4.5.3

v5.*

v5.0.0

v5.0.1

v5.1.0

v5.1.0b1

v6.*

v6.0.0

v6.0.0b1

v6.1.0

v6.1.0b1

v6.1.0b2

v6.2.0

v6.2.0b1

v6.2.0b2

v6.3.0

v6.3.0b1

v6.3.1

v6.4.0

v6.4.0b1

v6.4.1

v6.5.0

v6.5.0b1

v6.5.1

v6.5.2

Database specific

source

"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2025-67724.json"