SB2026110304 - Collapse of Data into Unsafe Value in Squid
Published: November 3, 2026
Security Bulletin ID
SB2026110304
CSH Severity
High
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Remote access
Highest impact
Denial of service
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 vulnerability.
1) Collapse of Data into Unsafe Value (CVE-ID: CVE-2024-28177)
CWE-ID: CWE-182 - Collapse of Data into Unsafe Value
CVSSv4: 8.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
The vulnerability allows a remote attacker to cause a denial of service.
The vulnerability exists due to a collapse of data into an unsafe value in Squid's ESI header handling when processing oversized ESI headers. A remote attacker can send oversized ESI headers to cause a denial of service.
ESI is an optional feature and is not built by default.
Remediation
Install update from vendor's website.