GHSA-3hxg-fxwm-8gf7: Refit (CVE-2024-51501)

Package	Ecosystem	Affected	Fixed in
Refit	NuGet	<7.2.22	7.2.22

Machine-written summary

Summary written by Claude Haiku from the source advisory. Not reviewed by a person.

Refit versions before 7.2.22 are vulnerable to CRLF injection through its Header, HeaderCollection and Authorize attributes, because header values are not checked for CRLF characters before being added to requests. An attacker who can influence a header value that an application passes through Refit could inject additional headers or split requests, which in a web application could lead to server-side request forgery. Upgrade Refit to 7.2.22 or later. The source gives few details about how the fix works.

Written 9 Nov 2026.

Not analysed yet

We haven’t published our analysis of this Advisory yet. Once a person has reviewed it, this page will say what’s vulnerable, what has to be true for your app to be affected, and how to check.

Severity and exploitation

Score	Rating	CVSS	Vector	Source
10.0	Critical	4.0	CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H	CNA (GitHub_M)

CISA KEV Not listed.
EPSS 0.0056, the 47th percentile, on 11 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

31 Oct 2026, 15:23 UTC First seen by agentprime
31 Oct 2026, 15:23 UTC Confirmed by OSV

Sources

Facts on this page come from the GitHub Advisory Database (CC-BY 4.0), OSV and the other sources listed, as published. We don’t reproduce full advisory descriptions, which can contain exploit code.