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Vulnerabilities

Vulnerability · CVE-2026-33515

Squid is a caching proxy for the Web.

Published Mar 26, 2026 · catalog updated Jun 17, 2026 · Squid is a caching

Check if you run it

No confirmed exploitation is on record for CVE-2026-33515. EPSS is 1.04%. Act only if a listed version of Squid is a caching is installed.

Gaps on this record

  • The stored product name is a package slug. The name on this page is taken from the title (Squid is a caching).
  • No version range is stored. A customer cannot check an installed version against this record.
  • No vendor fix or required action is stored. Compare the linked advisory before you change production.
Severity
Medium6.9
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
1.04%
Remediation
Advisory link
Affected products
cpe squid-cache/squid

Squid is a caching proxy for the Web. Prior to version 7.5, due to improper input validation, Squid is vulnerable to out of bounds read when handling ICP traffic. This problem allows a remote attacker to receive small amounts of memory potentially containing sensitive information when responding with errors to invalid ICP requests. This attack is limited to Squid deployments that explicitly enable ICP support (i.e. configure non-zero ). This problem cannot be mitigated by denying ICP queries using rules. Version 7.5 contains a patch.

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • cpe squid-cache/squidversion unspecified

How to fix CVE-2026-33515

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

No confirmed exploitation is on record for CVE-2026-33515. EPSS is 1.04%. Act only if a listed version of Squid is a caching is installed.

Which versions are affected?

Affected version ranges are not on this record. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

CWE-125: Out-of-bounds Read; CWE-1289. EPSS 1.04%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Code

The project this record applies to. Exploit listings stay in References.

Timeline

Detection, updates, and resolution for this record.

  1. Mar 26, 2026 · NIST NVD

    Detected

    Squid is a caching proxy for the Web. Prior to version 7.5, due to improper input validation, Squid is vulnerable to out of bounds read when handling ICP traffic. This problem allows a remote attacker to receive small amounts of memory potentially containing sensitive information when responding with errors to invalid ICP requests. This attack is limited to Squid deployments that explicitly enable

  2. Jun 17, 2026 · NIST NVD

    Updated

    Squid is a caching proxy for the Web. Prior to version 7.5, due to improper input validation, Squid is vulnerable to out of bounds read when handling ICP traffic. This problem allows a remote attacker to receive small amounts of memory potentially containing sensitive information when responding with errors to invalid ICP requests. This attack is limited to Squid deployments that explicitly enable

Sources

  • CVE.orgVulnerability recordCVE-2026-33515

    Official CVE identifier

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2026-33515

    30-day exploitation probability 1.0%

    first.org
  • NIST NVDVulnerability recordCVE-2026-33515

    Squid is a caching proxy for the Web. Prior to version 7.5, due to improper input validation, Squid is vulnerable to out of bounds read when handling ICP traffic. This problem allows a remote attacker to receive small amounts of memory potentially containing sensitive information

    nvd.nist.gov

References

Freshness

Last verified in this catalog Oct 18, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.