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Vulnerability record · CVE-2019-12387 · published 10 June 2019

CVE-2019-12387: Twisted injection vulnerability

Twisted · Twisted

In Twisted before 19.2.1, twisted.web did not validate or sanitize URIs or HTTP methods, allowing an attacker to inject invalid characters such as CRLF.

6.1 CVSS 3.1 Medium EPSS 2.5% · top 15.7% CWE-74 · Injection
6.1CVSS 3.1 base score, v2 4.3
2.5%EPSS exploitation probability, 30 days
NoNot in CISA KEV
5Affected product versions listed by NVD
18References, 4 tagged exploit
17 Jun 2026Last modified by NVD

Description

In Twisted before 19.2.1, twisted.web did not validate or sanitize URIs or HTTP methods, allowing an attacker to inject invalid characters such as CRLF.

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

Affected products

5 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
http://lists.opensuse.org/opensuse-security-announce/2019-07/msg00030.html Broken Link
http://lists.opensuse.org/opensuse-security-announce/2019-07/msg00042.html Broken Link
https://github.com/twisted/twisted/commit/6c61fc4503ae39ab8ecee52d10f10ee2c371d7e2 PatchThird Party Advisory
https://labs.twistedmatrix.com/2019/06/twisted-1921-released.html ExploitRelease NotesVendor Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/2G5RPDQ4BNB336HL6WW5ZJ3
https://twistedmatrix.com/pipermail/twisted-python/2019-June/032352.html ExploitRelease NotesVendor Advisory
https://usn.ubuntu.com/4308-1/ Third Party Advisory
https://usn.ubuntu.com/4308-2/ Third Party Advisory
https://www.oracle.com/security-alerts/cpuapr2020.html PatchThird Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2019-07/msg00030.html Broken Link
http://lists.opensuse.org/opensuse-security-announce/2019-07/msg00042.html Broken Link
https://github.com/twisted/twisted/commit/6c61fc4503ae39ab8ecee52d10f10ee2c371d7e2 PatchThird Party Advisory
https://labs.twistedmatrix.com/2019/06/twisted-1921-released.html ExploitRelease NotesVendor Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/2G5RPDQ4BNB336HL6WW5ZJ3
https://twistedmatrix.com/pipermail/twisted-python/2019-June/032352.html ExploitRelease NotesVendor Advisory
https://usn.ubuntu.com/4308-1/ Third Party Advisory
https://usn.ubuntu.com/4308-2/ Third Party Advisory
https://www.oracle.com/security-alerts/cpuapr2020.html PatchThird Party Advisory

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Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2019-12387), CISA KEV, FIRST EPSS (scores of 2026-09-30). This page is refreshed as NVD updates the record.