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ESB-2026.3422 PUBLISHED CVSS 7.5 HIGH

=========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2026.3422 USN-8157-1: Squid vulnerabilities 9 April 2026 =========================================================================== AUSCERT Security Bulletin Summary --------------------------------- Product: Squid Publisher: Ubuntu Operating System: Ubuntu Resolution: Patch/Upgrade CVE Names: CVE-2026-33515 CVE-2026-33526 CVE-2026-32748 Original Bulletin: https://ubuntu.com/security/notices/USN-8157-1 Comment: CVSS (Max): 7.5 CVE-2026-33526 (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H) CVSS Source: NIST Calculator: https://www.first.org/cvss/calculator/3.1#CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H EPSS (Max): 1.7% (82nd) CVE-2026-33526 2026-04-08 - --------------------------BEGIN INCLUDED TEXT-------------------- USN-8157-1: Squid vulnerabilities Publication date 8 April 2026 Overview Several security issues were fixed in Squid. Releases 25.10 24.04 LTS 22.04 LTS --------------------------------------------------------------------------------- Open side navigation Packages o squid - Web proxy cache server Details It was discovered that Squid incorrectly handled certain ICP traffic. In environments where ICP support is enabled, a remote attacker could use this issue to cause Squid to crash, resulting in a denial of service, or obtain small amounts of sensitive information. Update instructions The problem can be corrected by updating your system to the following package versions: Ubuntu Release Package Version 25.10 questing squid - 6.14-0ubuntu0.25.10.2 24.04 LTS noble squid - 6.14-0ubuntu0.24.04.2 22.04 LTS jammy squid - 5.9-0ubuntu0.22.04.5 --------------------------------------------------------------------------------- References o CVE-2026-33526 o CVE-2026-33515 o CVE-2026-32748 - --------------------------END INCLUDED TEXT---------------------- You have received this e-mail bulletin as a result of your organisation's registration with AUSCERT. The mailing list you are subscribed to is maintained within your organisation, so if you do not wish to continue receiving these bulletins you should contact your local IT manager. If you do not know who that is, please send an email to auscert@auscert.org.au and we will forward your request to the appropriate person. NOTE: Third Party Rights This security bulletin is provided as a service to AUSCERT's members. As AUSCERT did not write the document quoted above, AUSCERT has had no control over its content. The decision to follow or act on information or advice contained in this security bulletin is the responsibility of each user or organisation, and should be considered in accordance with your organisation's site policies and procedures. AUSCERT takes no responsibility for consequences which may arise from following or acting on information or advice contained in this security bulletin. NOTE: This is only the original release of the security bulletin. It may not be updated when updates to the original are made. If downloading at a later date, it is recommended that the bulletin is retrieved directly from the author's website to ensure that the information is still current. Contact information for the authors of the original document is included in the Security Bulletin above. If you have any questions or need further information, please contact them directly. Previous advisories and external security bulletins can be retrieved from: https://portal.auscert.org.au/bulletins/ =========================================================================== AUSCERT The University of Queensland, Brisbane QLD 4072 Australia e: auscert@auscert.org.au t: +61 (0)7 3365 4417 Allies in Cyber Security ===========================================================================

Risk Scores

CVSS v3.1
7.5
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Affected Products

VendorProductVersions
UbuntuSquid

Timeline

References

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