CVE-2026-33526 Details
A vulnerability was found in Squid Web Proxy up to 3.5.28/4.17/5.9/6.14/7.4 (Firewall Software). It has been rated as problematic. Affected by this issue is some unknown processing of the component ICP Request Handler. Upgrading to version 7.5 eliminates this vulnerability. Applying the patch 8a7d42f9d44befb8fcbbb619505587c8de6a1e91 is able to eliminate this problem. The bugfix is ready for download at github.com. The best possible mitigation is suggested to be upgrading to the latest version.
View at NVD
Exploit prediction scoring system (EPSS) score for CVE-2026-33526
EPSS (Exploit Prediction Scoring System): EPSS predicts the likelihood that a vulnerability will be exploited in the wild. A higher percentage means a greater chance of an exploit occurring. The EPSS model produces a probability score between 0 and 1 (0 and 100%).
1.4 Probability of exploitation activity being observed over the next 30 days (81th percentile)
CVSS score for CVE-2026-33526
CVSS (Common Vulnerability Scoring System): An open framework owned and managed by FIRST.Org, Inc. that assigns a numerical score from 0 to 10 to software vulnerabilities to indicate their severity.
7.5 High
Products affected by CVE-2026-33526
Squid 3.1.23
Squid 3.1.4
Squid 3.1.6
Squid 3.1.8
Squid 3.1.9
DVE Score by Bitsight AI
DVE scores complement traditional static scoring systems like CVSS with Bitsight AI powered real-time threat intelligence and underground cyber criminal activity so that security teams can reduce alert fatigue and focus on vulnerabilities most likely to be exploited.
Medium
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CVE-2026-33526 Global Footprint

Top 10 Identified Countries

Country Observations Percentage
US 789,217 64.57%
GB 60,119 4.92%
BR 51,794 4.24%
SC 32,868 2.69%
PK 32,488 2.66%
RO 31,592 2.58%
CA 31,373 2.57%
DE 31,097 2.54%
AE 26,187 2.14%
JP 16,728 1.37%

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CVE-2026-33526 Industry Footprint

Top 10 Identified Industries

*Service provider organizations (typically Technology and Telecommunications) are disproportionally represented in the results given their upstream ownership of end-user infrastructure. See our FAQs.

Industry* Observations Percentage
Technology 164,936 74.74%
Telecommunications 48,389 21.93%
Education 2,496 1.13%
Business Services 1,555 0.70%
Utilities 1,135 0.51%
Healthcare/Wellness 697 0.32%
Government/Politics 529 0.24%
Transportation 361 0.16%
Media/Entertainment 214 0.10%
Manufacturing 92 0.04%

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