High severity7.5NVD Advisory· Published Jul 12, 2021· Updated Jun 17, 2026
CVE-2021-27293
CVE-2021-27293
Description
RestSharp < 106.11.8-alpha.0.13 uses a regular expression which is vulnerable to Regular Expression Denial of Service (ReDoS) when converting strings into DateTimes. If a server responds with a malicious string, the client using RestSharp will be stuck processing it for an exceedingly long time. Thus the remote server can trigger Denial of Service.
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LLM-synthesized narrative grounded in this CVE's description and references.
Affected packages
Versions sourced from the GitHub Security Advisory.
| Package | Affected versions | Patched versions |
|---|---|---|
RestSharpNuGet | < 106.11.8-alpha.0.13 | 106.11.8-alpha.0.13 |
Affected products
11cpe:2.3:a:restsharp:restsharp:*:*:*:*:*:*:*:*+ 8 more
- cpe:2.3:a:restsharp:restsharp:*:*:*:*:*:*:*:*range: <=106.11.7
- cpe:2.3:a:restsharp:restsharp:106.11.8:alpha0.10:*:*:*:*:*:*
- cpe:2.3:a:restsharp:restsharp:106.11.8:alpha0.11:*:*:*:*:*:*
- cpe:2.3:a:restsharp:restsharp:106.11.8:alpha0.12:*:*:*:*:*:*
- cpe:2.3:a:restsharp:restsharp:106.11.8:alpha0.2:*:*:*:*:*:*
- cpe:2.3:a:restsharp:restsharp:106.11.8:alpha0.3:*:*:*:*:*:*
- cpe:2.3:a:restsharp:restsharp:106.11.8:alpha0.4:*:*:*:*:*:*
- cpe:2.3:a:restsharp:restsharp:106.11.8:alpha0.6:*:*:*:*:*:*
- cpe:2.3:a:restsharp:restsharp:106.11.8:alpha0.7:*:*:*:*:*:*
- RestSharp/RestSharpdescription
Patches
Vulnerability mechanics
References
6- github.com/restsharp/RestSharp/issues/1556nvdExploitPatchThird Party AdvisoryWEB
- github.com/advisories/GHSA-9pq7-rcxv-47vqghsaADVISORY
- nvd.nist.gov/vuln/detail/CVE-2021-27293ghsaADVISORY
- github.com/restsharp/RestSharp/commit/be39346784b68048b230790d15333574341143bcghsaWEB
- restsharp.devghsaWEB
- restsharp.devnvdProduct
News mentions
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