Machine-written summary
Summary written by Claude Haiku from the source advisory. Not reviewed by a person.
The NuGet package RestSharp from 107.0.0-preview.1 up to (but not including) 112.0.0 is vulnerable to CRLF injection through header values passed to RestRequest.AddHeader, RestRequest.AddOrUpdateHeader, and RestClient.AddDefaultHeader. An attacker who can control a header value supplied by the application could inject line breaks, adding extra headers or splitting requests, which may enable server-side request forgery in web applications. Upgrade to RestSharp 112.0.0 or later; the source gives no other workaround beyond not passing untrusted input into header values.
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 |
|---|---|---|---|---|
| 6.1 | Medium | 3.1 | CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:H | CNA (GitHub_M) |
- CISA KEV Not listed.
- EPSS 0.0032, the 24th 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
- GitHub Advisory Database: GHSA-4rr6-2v9v-wcpc
- OSV: GHSA-4rr6-2v9v-wcpc
- github.com/restsharp/RestSharp/security/advisories/GHSA-4rr6-2v9v-wcpc
- nvd.nist.gov/vuln/detail/CVE-2024-45302
- github.com/restsharp/RestSharp/commit/0fba5e727d241b1867bd71efc912594075c2934b
- github.com/restsharp/RestSharp
- github.com/restsharp/RestSharp/blob/777bf194ec2d14271e7807cc704e73ec18fcaf7e/src/RestSharp/Request/HttpRequestMessageExtensions.cs#L32