UpHeron
All vulnerabilities

Servers and applications

CVE-2021-31808

An issue was discovered in Squid before 4.15 and 5.x before 5.0.6. Due to an input-validation bug, it is vulnerable to a Denial of Service attack (against all clients using the proxy). A client sends an HTTP Range request to trigger this.

Severity
Medium 6.5
Published
27 May 2021
Last changed
17 Jun 2026
Added to UpHeron
1 Nov 2026
Fixed in
4.15, 5.0.6
Sources
NVD

Affected software

SoftwareAffected versions
SquidServers and applications · cpe:a:squid-cache:squid
  • Every version before 4.15
  • From 5.0 before 5.0.6

References

  • NVD https://nvd.nist.gov/vuln/detail/CVE-2021-31808
  • CVE.org https://www.cve.org/CVERecord?id=CVE-2021-31808