CVE-2009-0801
Squid, when transparent interception mode is enabled, uses the HTTP Host header to determine the...
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.
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 List No 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-2009-0799 No 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-c2c7-4fx5 No 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
OSV No 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-2009-0801 No 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
| When | Changed | Sources |
|---|---|---|
| 2026-11-03 | aliases | EUVD |
| 2026-11-02 | created | CVE List, GitHub Advisories, NVD, OSV |