Red Hat Security Advisory: squid:4 security update
Two denial of service vulnerabilities have been identified in Squid 4, a high-performance proxy caching server used in Red Hat Enterprise Linux 8. These vulnerabilities involve a heap use-after-free in ICP handling (CVE-2026-33526) and denial of service via crafted ICP traffic (CVE-2026-32748). Red Hat has issued an important security update addressing these issues in the squid:4 module for RHEL 8. The update mitigates the risk of service disruption caused by these vulnerabilities. No known exploits are reported in the wild at this time.
AI Analysis
Technical Summary
Red Hat Product Security released an advisory (RHSA-2026:8317) for squid:4 on Red Hat Enterprise Linux 8 addressing two denial of service vulnerabilities. CVE-2026-33526 is a heap use-after-free vulnerability in ICP handling, and CVE-2026-32748 involves denial of service via crafted ICP traffic. Both vulnerabilities could allow an attacker to disrupt the proxy service. The advisory provides updated packages for multiple architectures and instructs users to apply the update to remediate these issues. The vulnerabilities are rated as important by Red Hat, and no CVSS scores are provided in the advisory.
Potential Impact
Successful exploitation of these vulnerabilities can cause denial of service conditions in the Squid proxy server, potentially disrupting web proxy services relying on Squid. There are no reports of active exploitation in the wild. The impact is limited to service availability degradation rather than code execution or data compromise.
Mitigation Recommendations
Red Hat has released updated squid:4 packages for Red Hat Enterprise Linux 8 that fix these vulnerabilities. Users should apply the security update as described in Red Hat advisory RHSA-2026:8317 and the linked article https://access.redhat.com/articles/11258 to remediate these issues. Since this is an on-premises product, administrators must manually deploy the update. No additional mitigations are specified by the vendor.
Red Hat Security Advisory: squid:4 security update
Description
Two denial of service vulnerabilities have been identified in Squid 4, a high-performance proxy caching server used in Red Hat Enterprise Linux 8. These vulnerabilities involve a heap use-after-free in ICP handling (CVE-2026-33526) and denial of service via crafted ICP traffic (CVE-2026-32748). Red Hat has issued an important security update addressing these issues in the squid:4 module for RHEL 8. The update mitigates the risk of service disruption caused by these vulnerabilities. No known exploits are reported in the wild at this time.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
Red Hat Product Security released an advisory (RHSA-2026:8317) for squid:4 on Red Hat Enterprise Linux 8 addressing two denial of service vulnerabilities. CVE-2026-33526 is a heap use-after-free vulnerability in ICP handling, and CVE-2026-32748 involves denial of service via crafted ICP traffic. Both vulnerabilities could allow an attacker to disrupt the proxy service. The advisory provides updated packages for multiple architectures and instructs users to apply the update to remediate these issues. The vulnerabilities are rated as important by Red Hat, and no CVSS scores are provided in the advisory.
Potential Impact
Successful exploitation of these vulnerabilities can cause denial of service conditions in the Squid proxy server, potentially disrupting web proxy services relying on Squid. There are no reports of active exploitation in the wild. The impact is limited to service availability degradation rather than code execution or data compromise.
Mitigation Recommendations
Red Hat has released updated squid:4 packages for Red Hat Enterprise Linux 8 that fix these vulnerabilities. Users should apply the security update as described in Red Hat advisory RHSA-2026:8317 and the linked article https://access.redhat.com/articles/11258 to remediate these issues. Since this is an on-premises product, administrators must manually deploy the update. No additional mitigations are specified by the vendor.
Technical Details
- Gcve Source
- db.gcve.eu
- Csaf Category
- csaf_security_advisory
- Csaf Version
- 2.0
- Publisher
- Red Hat Product Security
- Advisory Id
- RHSA-2026:8317
- Cve Count
- 2
- Additional Cves
- ["CVE-2026-33526"]
- Cvss Version
- null
Threat ID: 6a160981e29bf47b5064ef56
Added to database: 5/26/2026, 8:58:41 PM
Last enriched: 5/26/2026, 9:49:24 PM
Last updated: 5/27/2026, 5:03:42 AM
Views: 2
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