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CVE-2026-32748
Squid vulnerability analysis and mitigation

Squid is a caching proxy for the Web. Prior to version 7.5, due to premature release of resource during expected lifetime and heap Use-After-Free bugs, Squid is vulnerable to Denial of Service when handling ICP traffic. This problem allows a remote attacker to perform a reliable and repeatable Denial of Service attack against the Squid service using ICP protocol. This attack is limited to Squid deployments that explicitly enable ICP support (i.e. configure non-zero icp_port). This problem cannot be mitigated by denying ICP queries using icp_access rules. This bug is fixed in Squid version 7.5.


SourceNVD

Related Squid vulnerabilities:

CVE ID

Severity

Score

Technologies

Component name

CISA KEV exploit

Has fix

Published date

CVE-2026-33526CRITICAL9.2
  • SquidSquid
  • squid-sysvinit
NoYesMar 26, 2026
CVE-2026-32748HIGH8.7
  • SquidSquid
  • squid34
NoYesMar 26, 2026
CVE-2025-62168HIGH7.5
  • SquidSquid
  • squid:4::libecap
NoYesOct 17, 2025
CVE-2026-33515MEDIUM6.9
  • SquidSquid
  • squid:4::libecap
NoYesMar 26, 2026
ELSA-2025-20935HIGHN/A
  • SquidSquid
  • squid
NoYesNov 25, 2025

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