CVE-2009-0804: n/a vulnerability

CVE-2009-0804: Ziproxy 2.6.0, when transparent interception mode is enabled, uses the HTTP Host header to determine the re...

Ziproxy 2.6.0, when transparent interception mode is enabled, uses the HTTP Host header to determine the remote endpoint, which allows remote attackers to bypass access controls for Flash, Java, Silverlight, and probably other technologies, and possibly communicate with restricted intranet sites, via a crafted web page that causes a client to send HTTP requests with a modified Host header.

UnknownCVSS not scoredNot KEV-listedUpdatedSep 16, 2024, 19:40 UTC (UTC+00:00)

Security readout for executives and security teams

Ziproxy 2.6.0 can misroute traffic in transparent interception mode by trusting the HTTP Host header. A malicious webpage could make a client send requests that appear to target another host, potentially bypassing controls around browser technologies and reaching restricted intranet resources through the proxy. Exposure is most likely where Ziproxy 2.6.0 is deployed as a transparent intercepting HTTP proxy and can reach internal or restricted services on behalf of clients. Treat as a targeted exposure review, not an emergency internet-wide issue. Prioritize environments where old Ziproxy transparent proxies bridge user browsing traffic to sensitive internal services. Mitigation focus: Inventory Ziproxy deployments and confirm whether version 2.6.0 is present.; Check whether transparent interception mode is enabled.; Review CERT and vendor guidance for official fixes or configuration advice..

Prepared: Jun 28, 2026, 11:23 UTC (UTC+00:00)

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.

Potential ATT&CK relevance

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Vulnerability profileCVE Program record

Severity: Unknown
CVSS: Not scored
Known Exploited: No
Published: Mar 4, 2009, 16:00 UTC (UTC+00:00)

Official CVE source material

CNA and ADP enrichment extracted from CVE v5

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CVE List V5 sourceCVE List V5

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus

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