Twisted: HTTP Request Smuggling in twisted.web via a Bare CR or LF in a Header Value
Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).
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Github GHSA |
GHSA-q7qq-6mhp-9rc4 | Twisted: HTTP Request Smuggling in twisted.web via a Bare CR or LF in a Header Value |
No CVSS v4.0
No CVSS v3.0
No CVSS v2
This CVE is not in the KEV list.
Exploit prediction score: < 1% (0.257% probability within 30 days)
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| Description | Twisted is an event-based framework for internet applications, supporting Python 3.6+. Prior to 26.10.0rc1, twisted.web.http.HTTPChannel.headerReceived rejects a NUL byte in an HTTP header value but accepts a bare carriage return or bare line feed. Because Twisted splits header lines only on CRLF, a hidden Content-Length header can remain folded into another value while a lenient front end treats the bare character as a line terminator. The resulting framing disagreement can smuggle a following request past front-end access controls, poison a shared connection or cache, and expose a later client to the wrong response. This issue is an incomplete-fix residual of earlier Twisted request-smuggling protections. This issue is fixed in version 26.10.0rc1. | |
| Title | Twisted: HTTP Request Smuggling in twisted.web via a Bare CR or LF in a Header Value | |
| Weaknesses | CWE-444 | |
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cvssV3_1
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