UpHeron
All vulnerabilities

Servers and applications

CVE-2015-5400

Squid before 3.5.6 does not properly handle CONNECT method peer responses when configured with cache_peer, which allows remote attackers to bypass intended restrictions and gain access to a backend proxy via a CONNECT request.

Severity
Medium 6.8
Published
28 Sept 2015
Last changed
17 Jun 2026
Added to UpHeron
1 Nov 2026
Exploit chance
21% in the next 30 daysHigher than 97% of CVEs. EPSS by FIRST, 11 Nov 2026
Weakness
CWE-264
Attack
Over the network · No login needed
Attacker can
Read some data · Change some data · Slow it down
CVSS vector
AV:N/AC:M/Au:N/C:P/I:P/A:P
Sources
NVD

Affected software

SoftwareAffected versions
SquidServers and applications · cpe:a:squid-cache:squid
  • Every version up to 3.5.2

References

  • NVD https://nvd.nist.gov/vuln/detail/CVE-2015-5400
  • CVE.org https://www.cve.org/CVERecord?id=CVE-2015-5400