# CVE-2023-49286

## Summary

- **CVE ID:** CVE-2023-49286
- **Severity:** HIGH
- **CVSS Score:** 8.6 (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H)
- **CWE:** CWE-617, CWE-253
- **Published:** Dec 4, 2023
- **Last Modified:** Mar 13, 2026

## Description

Squid is a caching proxy for the Web supporting HTTP, HTTPS, FTP, and more. Due to an Incorrect Check of Function Return Value bug Squid is vulnerable to a Denial of Service attack against its Helper process management. This bug is fixed by Squid version 6.5. Users are advised to upgrade. There are no known workarounds for this vulnerability.

## Affected Products

- squid-cache — squid (< 6.5)

## References

- [CNA](https://github.com/squid-cache/squid/security/advisories/GHSA-xggx-9329-3c27)
- [CNA](https://github.com/squid-cache/squid/commit/6014c6648a2a54a4ecb7f952ea1163e0798f9264)
- [CNA](http://www.squid-cache.org/Versions/v6/SQUID-2023_8.patch)
- [CNA](https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/MEV66D3PAAY6K7TWDT3WZBLCPLASFJDC/)
- [CNA](https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/A5QASTMCUSUEW3UOMKHZJB3FTONWSRXS/)
- [CNA](https://lists.debian.org/debian-lts-announce/2024/01/msg00003.html)
- [CNA](https://security.netapp.com/advisory/ntap-20240119-0004/)

## Exploitation Prediction (EPSS)

- **EPSS Score:** 1.88%
- **EPSS Percentile:** 82.8

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_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-18._