CVE-2025-54574 – Squid Heap Buffer Overflow (Remote Code Execution)

The following table lists the changes that have been made to the
CVE-2025-54574 vulnerability over time.

Vulnerability history details can be useful for understanding the evolution
of a vulnerability, and for identifying the most recent changes that may
impact the vulnerability’s severity, exploitability, or other characteristics.

  • New CVE Received
    by [email protected]

    Aug. 01, 2025

    Action Type Old Value New Value
    Added Description Squid is a caching proxy for the Web. In versions 6.3 and below, Squid is vulnerable to a heap buffer overflow and possible remote code execution attack when processing URN due to incorrect buffer management. This has been fixed in version 6.4. To work around this issue, disable URN access permissions.
    Added CVSS V3.1 AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:L/A:H
    Added CWE CWE-122
    Added Reference https://github.com/squid-cache/squid/commit/a27bf4b84da23594150c7a86a23435df0b35b988
    Added Reference https://github.com/squid-cache/squid/releases/tag/SQUID_6_4
    Added Reference https://github.com/squid-cache/squid/security/advisories/GHSA-w4gv-vw3f-29g3
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