HOMEVULNERABILITIESCVE-2026-32748
HIGH

CVE-2026-32748

CWE-413Published: March 26, 2026· Updated: Mar 26, 2026

7.5
CVSS v3.1
EPSS:0.98%probability of exploitation in 30 daysPercentile:76.6th

Official Description

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.

NVD Source

Technical Analysis

CVE-2026-32748 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

A successful exploit results in availability disruption (denial of service), with a CVSS base score of 7.5.

CVSS v3.1 Vector Breakdown

Exploitability
Attack VectorNetwork
Attack ComplexityLow
Privileges Req.None
User InteractionNone
ScopeUnchanged
Impact
ConfidentialityNone
IntegrityNone
AvailabilityHigh
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Affected Vendors & Products

squid-cache1 product
squid
Source: NVD CPE · 1 total CPE entries

Exploit & PoC Resources

NO KNOWN EXPLOITNo public exploit confirmed at this time
Exploit-DB
Offensive Security exploit database
GitHub PoC Search
Community PoC repositories
Rapid7 / Metasploit
Metasploit module search
PacketStorm
Security advisories & exploits
NVD Detail
Official NIST entry
MITRE CVE
CVE Program entry
External links open in a new tab. Always verify in a controlled environment before use.

Official Patches & Advisories

PATCHhttps://github.com/squid-cache/squid/commit/703e07d25ca6fa11f52d20bf0bb879e22ab7481b
PATCHhttps://github.com/squid-cache/squid/security/advisories/GHSA-f9p7-3jqg-hhvq
PATCHhttp://www.openwall.com/lists/oss-security/2026/03/25/3

All References (3)

→
https://github.com/squid-cache/squid/commit/703e07d25ca6fa11f52d20bf0bb879e22ab7481bPatch
→
https://github.com/squid-cache/squid/security/advisories/GHSA-f9p7-3jqg-hhvqMitigation · Patch · Vendor Advisory
→
http://www.openwall.com/lists/oss-security/2026/03/25/3Mailing List · Patch · Third Party Advisory · Mitigation

Quick Facts

CVE IDCVE-2026-32748
CVSS Score7.5 / 10
SeverityHIGH
WeaknessCWE-413
CISA KEVNo
EPSS (30d)0.98%
Affected1 vendor
PublishedMar 26, 2026

Related CVEs (CWE-413)

CVE-2026-44608
5.9

Recommended Actions

  • →Apply vendor patches immediately
  • →Monitor CVE-2026-32748 in threat intel feeds
  • →Review IDS/IPS signatures for exploitation attempts
Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWATCH.COM. CVE data is provided under the NVD usage policy.
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