CVE-2009-0801
Squid, when transparent interception mode is enabled, uses the HTTP Host header to determine the...
Squid, 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.
Exploit likelihood
What each source reports
NVD Score used
Squid, 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.
- Record
CVE-2009-0801- CVSS 2.0
- 5.4 Medium
AV:N/AC:H/Au:N/C:C/I:N/A:N - Weakness
- CWE-264
- Updated
- 2026-11-02
CVE ListNo score
Squid, 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.
- Record
CVE-2009-0801- Updated
- 2026-11-02
EUVDEUVD-2009-0799No score
Squid, 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.
- Record
EUVD-2009-0799- Updated
- 2026-11-03
GitHub AdvisoriesGHSA-w87g-c2c7-4fx5No score
Squid, when transparent interception mode is enabled, uses the HTTP Host header to determine the...
Squid, 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.
- Record
GHSA-w87g-c2c7-4fx5- Updated
- 2026-11-02
OSVNo score
Squid, 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.
- Record
CVE-2009-0801- Updated
- 2026-11-02
OSVDEBIAN-CVE-2009-0801No score
Squid, 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.
- Record
DEBIAN-CVE-2009-0801- Updated
- 2026-11-02
Affected products
Affected packages
History
| Recorded | Changed | Sources |
|---|---|---|
| facts | ||
| aliases | EUVD | |
| first indexed | CVE List, GitHub Advisories, NVD, OSV |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2009-0801 is a medium vulnerability (CVSS 5.4) in Squid Web Proxy Cache, published March 4, 2009. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 3.09%, the 87th percentile. Fixed in squid 4.1-1.