CVE-2018-1000164
CVSS v3
7.5
HIGH
EPSS Score
2.4 %
exploit probability, as of 2026-10-19
CISA KEV
No
known exploited
Exploitation
—
SSVC status
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Affected and fixed versions
Packages from OSV.dev and products from the vendors' CSAF advisories.
version not verifiedVersions not verified: read as OSV.dev and the vendors publish them, not checked against each vendor's release list.
Packages
- gunicornPyPIall versions · fixed in 19.5.0
Vendor advisories
python-gunicorn: Improper neutralization of CRLF Sequences http/wsgi.py:process_headers() can allow an attacker to cause a server to return arbitrary HTTP headers
python-gunicorn as a component of Red Hat Enterprise Linux 7 · python-gunicorn as a component of Red Hat Storage Console 2
Description
gunicorn version 19.4.5 contains a CWE-113: Improper Neutralization of CRLF Sequences in HTTP Headers vulnerability in "process_headers" function in "gunicorn/http/wsgi.py" that can result in an attacker causing the server to return arbitrary HTTP headers. This vulnerability appears to have been fixed in 19.5.0.
Technical details
- Published
- 2018-04-18
Frequently asked questions
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Related vulnerabilities
Same product first, then the same vendor advisory and the same publication week.