CVE-2021-27293

HIGH
Published Jul 12, 20214y ago · Modified Jun 17, 20262w ago
7.5 CVSS 3.1
High
Find Similar
Published Jul 12, 2021 4y ago
Last Modified Jun 17, 2026 2w ago

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.

CVSS Details

Base Score
7.5
Exploitability
3.9
Impact
3.6
Vector string
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Attack Vector Network
Attack Complexity Low
Privileges Required None
User Interaction None
Scope Unchanged
Confidentiality None
Integrity None
Availability High

Threat Intelligence

No active exploitation signals — not in CISA KEV and no EPSS score yet.

Exploit & Patch Status
Public Exploit Known
Patch Available

Weaknesses 1

CWE-697

Affected Products 9

VendorProductVersionRange
restsharprestsharp* ≤106.11.7
restsharprestsharp106.11.8any
restsharprestsharp106.11.8any
restsharprestsharp106.11.8any
restsharprestsharp106.11.8any
restsharprestsharp106.11.8any
restsharprestsharp106.11.8any
restsharprestsharp106.11.8any
restsharprestsharp106.11.8any

References 2

  • github.com https://github.com/restsharp/RestSharp/issues/1556
    ExploitPatchThird Party Advisory
  • restsharp.dev https://restsharp.dev/
    Product

Remediation

  • github.com https://github.com/restsharp/RestSharp/issues/1556
    ExploitPatchThird Party Advisory