CVE-1999-1273

HIGH 7.5CVE-1999-1273 · Published 20/02/1998 · updated 16/06/2026

In short

CVE-1999-1273 is a HIGH (CVSS 7.5) vulnerability affecting squid web proxy (national science foundation).
Chance of exploitation in the next 30 days (EPSS): 1.3%, higher than 70.3% of all vulnerabilities.
No patched version is listed yet: follow the vendor's advisory in References.

Package	Affected versions	Patched versions
squid web proxy national_science_foundation	`= 1.1.20`	No fix yet

Squid Internet Object Cache 1.1.20 allows users to bypass access control lists (ACLs) by encoding the URL with hexadecimal escape sequences.

Running one of these products? Scan your site to see whether it exposes a vulnerable version.