CVE-2026-32748

Summary

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.

Affected Software

VendorProductVersion RangeStatus
squid-cachesquid< 7.5affected

Weaknesses

  • CWE-413: CWE-413: Improper Resource Locking
  • CWE-416: CWE-416: Use After Free
  • CWE-826: CWE-826: Premature Release of Resource During Expected Lifetime

ADP Enrichment

CVE Program Container

Additional References

CISA ADP Vulnrichment

  • SSVC:
  • Exploitation: none
    • Automatable: yes
    • Technical Impact: partial

Squid: Squid: Denial of Service via crafted ICP traffic

Additional References

References