CVE-2012-2374
Tornado CRLF injection vulnerability
CVE-2012-2374 is a medium vulnerability (CVSS 5.0) in Tornadoweb Tornado, published May 23, 2012. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 1.36%, the 71st percentile. Fixed in tornado 2.2.1.
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.
Exploit likelihood
What each source reports
NVD Score used
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.
- Record
CVE-2012-2374- CVSS 2.0
- 5.0 Medium
AV:N/AC:L/Au:N/C:N/I:P/A:N - Weakness
- CWE-20
- Updated
- 2026-11-02
CVE List No score
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.
- Record
CVE-2012-2374- Updated
- 2026-11-02
EUVDEUVD-2012-0029 No score
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.
- Record
EUVD-2012-0029- Updated
- 2026-11-03
GitHub AdvisoriesGHSA-f7fv-v9rh-prvc
Tornado CRLF injection vulnerability
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.
- Record
GHSA-f7fv-v9rh-prvc- CVSS 4.0
- 8.7 High
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N - CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N - Weakness
- CWE-20
- Updated
- 2026-11-02
OSVGHSA-f7fv-v9rh-prvc
Tornado CRLF injection vulnerability
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.
- Record
GHSA-f7fv-v9rh-prvc- CVSS 4.0
- 8.7 High
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N - CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N - Weakness
- CWE-20
- Updated
- 2026-11-02
OSV No score
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.
- Record
CVE-2012-2374- Updated
- 2026-11-02
OSVDEBIAN-CVE-2012-2374 No score
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.
- Record
DEBIAN-CVE-2012-2374- Updated
- 2026-11-02
OSVPYSEC-2012-5 No score
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.
- Record
PYSEC-2012-5- Updated
- 2026-11-02
Affected products
Affected packages
| Package | Affected | Fixed |
|---|---|---|
tornadoPyPI |
before 2.2.1 | 2.2.1 |
python-tornadoDebian:12 |
before 2.1.0-3 | 2.1.0-3 |
python-tornadoDebian:13 |
before 2.1.0-3 | 2.1.0-3 |
python-tornadoDebian:14 |
before 2.1.0-3 | 2.1.0-3 |
tornadoPyPI |
before 2.2.1, plus listed versions 0.21.01.11.1.11.2 Show 5 moreShow less1.2.12.02.12.1.12.2 |
2.2.1 |
History
| When | Changed | Sources |
|---|---|---|
| 2026-11-03 | aliases | EUVD |
| 2026-11-02 | created | CVE List, GitHub Advisories, NVD, OSV |
References
securityfocus.com/bid/53612
tornadoweb.org/documentation/releases/v2.2.1.html
secunia.com/advisories/49185
openwall.com/lists/oss-security/2012/05/18/6
openwall.com/lists/oss-security/2012/05/18/12
nvd.nist.gov/vuln/detail/CVE-2012-2374
Show 7 moreShow less
github.com/tornadoweb/tornado/commit/1ae91f6d58e6257e0ab49d295d8741ce1727bdb7
web.archive.org/web/20140720192646/http://secunia.com/advisories/49185
security-tracker.debian.org/tracker/CVE-2012-2374