CRLF injection vulnerability in the tornado.web.RequestHandler.set_header function in Tornado before 2.2.1 allows remote attackers to…

Description

CRLF injection vulnerability in the tornado.web.RequestHandler.set_header function in Tornado before 2.2.1 allows remote attackers to inject arbitrary HTTP headers and conduct HTTP response splitting attacks via crafted input.

Scores

EPSS (exploitation in 30 days)

1.4% · top 28% of all CVEs (2 Nov 2026)

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The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 5.0.

Weakness

• n/a
• CWE-20 (opens in a new tab)

Affected products

• n/a

  • affected n/a

Affected packages

From reviewed advisories of the GitHub Advisory Database.

• PyPItornadoGHSA-f7fv-v9rh-prvc (opens in a new tab)

References (5)

• 53612 (opens in a new tab)vdb-entryx_refsource_BIDx_transferred
• http://www.tornadoweb.org/documentation/releases/v2.2.1.html (opens in a new tab)x_refsource_CONFIRMx_transferred
• 49185 (opens in a new tab)third-party-advisoryx_refsource_SECUNIAx_transferred
• [oss-security] 20120518 CVE Request -- Tornado (python-tornado): Tornado v2.2.1 tornado.web.RequestHandler.set_header() fix to prevent header injection (opens in a new tab)mailing-listx_refsource_MLISTx_transferred
• [oss-security] 20120518 Re: CVE Request -- Tornado (python-tornado): Tornado v2.2.1 tornado.web.RequestHandler.set_header() fix to prevent header injection (opens in a new tab)mailing-listx_refsource_MLISTx_transferred

Sources

The same CVE in the primary databases and aggregators, to check against.

• CVE.org record (opens in a new tab)
• CVE List JSON (GitHub) (opens in a new tab)
• NVD (opens in a new tab)
• FIRST EPSS (opens in a new tab)
• OSV.dev (opens in a new tab)
• GitHub Advisory GHSA-f7fv-v9rh-prvc (opens in a new tab)
• CIRCL Vulnerability-Lookup (opens in a new tab)

Record last updated 6 Aug 2024, 19:34 UTC.