How severe is CVE-2026-32748?

CVE-2026-32748 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.

Is CVE-2026-32748 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 9% (95th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-32748?

CVE-2026-32748 affects Squid-cache Squid. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-32748?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

Does CVE-2026-32748 have an EU (EUVD) identifier?

Yes. CVE-2026-32748 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-16056.

When was CVE-2026-32748 published?

CVE-2026-32748 was published on 2026-03-26 and last updated on 2026-06-30.

CVE-2026-32748

CVE-2026-32748 is a high-severity vulnerability in Squid-cache Squid with a CVSS 3.x base score of 7.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-413.

Key facts

Severity: High (CVSS 3.x base score 7.5)
CVSS v4: 8.7
EPSS exploit prediction: 9% (95th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-16056
Weakness: CWE-413
Affected product: Squid-cache Squid
Published: 2026-03-26
Last modified: 2026-06-30

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.

Frequently asked questions

What is CVE-2026-32748?: 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.
How severe is CVE-2026-32748?: CVE-2026-32748 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.
Is CVE-2026-32748 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 9% (95th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-32748?: CVE-2026-32748 affects Squid-cache Squid. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-32748?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
Does CVE-2026-32748 have an EU (EUVD) identifier?: Yes. CVE-2026-32748 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-16056.
When was CVE-2026-32748 published?: CVE-2026-32748 was published on 2026-03-26 and last updated on 2026-06-30.

References

Affected products (1)

cpe:2.3:a:squid-cache:squid:*:*:*:*:*:*:*:*

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Other CWE-413 vulnerabilities

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CVE-2019-8998 — High (CVSS 7.8): An information disclosure vulnerability leading to a potential local escalation of privilege in the procfs service (the…
CVE-2022-49737 — High (CVSS 7.7): In X.Org X server 20.11 through 21.1.16, when a client application uses easystroke for mouse gestures, the main thread…
CVE-2025-0003 — High (CVSS 7.3): Inadequate lock protection within Xilinx Run time may allow a local attacker to trigger a Use-After-Free condition…
CVE-2023-33951 — Medium (CVSS 6.7): A race condition vulnerability was found in the vmwgfx driver in the Linux kernel. The flaw exists within the handling…

Browse all CWE-413 vulnerabilities →

Threat intelligence

Threat-intel indicators referencing this CVE:

78.39.48.166 (ipv4-addr)
212.58.132.5 (ipv4-addr)
103.200.23.154 (ipv4-addr)
38.248.6.103 (ipv4-addr)
200.89.159.59 (ipv4-addr)
103.54.101.248 (ipv4-addr)
74.113.233.217 (ipv4-addr)
192.3.127.40 (ipv4-addr)