CVE-2024-45302: RestSharp is a Simple REST and HTTP API Client for .NET

Routine

MEDIUM 6.1UPGRADE

CVE-2024-45302 is a medium-severity flaw (CVSS 6.1) affecting restsharp. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

RestSharp is a Simple REST and HTTP API Client for .NET. The second argument to `RestRequest.AddHeader` (the header value) is vulnerable to CRLF injection. The same applies to `RestRequest.AddOrUpdateHeader` and `RestClient.AddDefaultHeader`. The way HTTP headers are added to a request is via the `HttpHeaders.TryAddWithoutValidation` method which does not check for CRLF characters in the header value. This means that any headers from a `RestSharp

Why this priority

Public exploit reference

A fixed release or distro patch exists.

Risk facts

CVSS score	6.1 (Medium)
Attack vector	Local
Attack complexity	Low
Privileges needed	None
User interaction	Required
EPSS exploit chance	0.3% (top 75%)
CISA exploited list	No
Weakness	CWE-93, CWE-74
Published	2024-08-29
Last modified	2026-06-17

Publisher (CNA): GitHub, Inc. · Vendor: restsharp

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2024-08-29 22:15 UTCPublished CVE record published
2026-06-17 07:53 UTCUpdated Record last modified

restsharp restsharp UPGRADE

Affected: >= 107.0.0 and < 112.0.0

Fixed in: 112.0.0

Safe to downgrade to: a release before 107.0.0

1. Check installed version

apt-cache policy restsharp || rpm -q restsharp || restsharp --version

2. UPGRADE to 112.0.0 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade restsharp

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade restsharp

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

3. If no update is available yet, DOWNGRADE to a release before 107.0.0 (Debian / Ubuntu)

apt-cache madison restsharp sudo apt install restsharp=<VERSION_BEFORE_107.0.0> sudo apt-mark hold restsharp

3. If no update is available yet, DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list restsharp sudo dnf downgrade restsharp-<VERSION_BEFORE_107.0.0> sudo dnf versionlock add restsharp

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2024-45302?

restsharp: upgrade to 112.0.0. Exact commands for each OS are on this page.

Is CVE-2024-45302 being exploited?

CVE-2024-45302 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2024-45302 affect?

CVE-2024-45302 affects restsharp. Severity is medium (CVSS 6.1). RestSharp is a Simple REST and HTTP API Client for .NET. The second argument to `RestRequest.AddHeader` (the header value) is vulnerable to CRLF injection. The same applies to `RestRequest.AddOrUpdateHeader` and `RestClient.AddDefaultHeader

How urgent is CVE-2024-45302?

Priority 32/100. Public exploit reference

References

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