CVE-2006-6303

CVE-2006-6303 is a medium-severity vulnerability in Yukihiro Matsumoto Ruby with a CVSS 2.0 base score of 5.0. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-399.

Key facts

Description

The read_multipart function in cgi.rb in Ruby before 1.8.5-p2 does not properly detect boundaries in MIME multipart content, which allows remote attackers to cause a denial of service (infinite loop) via crafted HTTP requests, a different issue than CVE-2006-5467.

Frequently asked questions

What is CVE-2006-6303?
The read_multipart function in cgi.rb in Ruby before 1.8.5-p2 does not properly detect boundaries in MIME multipart content, which allows remote attackers to cause a denial of service (infinite loop) via crafted HTTP requests, a different issue than CVE-2006-5467.
How severe is CVE-2006-6303?
CVE-2006-6303 has a CVSS 2.0 base score of 5.0, rated medium severity.
Is CVE-2006-6303 being actively exploited?
It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 4% (88th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2006-6303?
CVE-2006-6303 primarily affects Yukihiro Matsumoto Ruby. In total, 8 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2006-6303?
Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2006-6303 published?
CVE-2006-6303 was published on 2006-12-06 and last updated on 2026-06-16.

References

Affected products (8)

More vulnerabilities in Yukihiro Matsumoto Ruby

All CVEs affecting Yukihiro Matsumoto Ruby →

Other CWE-399 (Resource Management Errors) vulnerabilities

Browse all CWE-399 (Resource Management Errors) vulnerabilities →