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1 vulnerability by kagisearch

CVE-2026-39376 (GCVE-0-2026-39376)

Vulnerability from cvelistv5 – Published: 2026-04-07 19:46 – Updated: 2026-04-08 19:22
VLAI?
Title
FastFeedParser has an infinite redirect loop DoS via meta-refresh chain
Summary
FastFeedParser is a high performance RSS, Atom and RDF parser. Prior to 0.5.10, when parse() fetches a URL that returns an HTML page containing a <meta http-equiv="refresh"> tag, it recursively calls itself with the redirect URL — with no depth limit, no visited-URL deduplication, and no redirect count cap. An attacker-controlled server that returns an infinite chain of HTML meta-refresh responses causes unbounded recursion, exhausting the Python call stack and crashing the process. This vulnerability can also be chained with the companion SSRF issue to reach internal network targets after bypassing the initial URL check. This vulnerability is fixed in 0.5.10.
Severity ?
7.5 (High)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CWE
Assigner
References
Impacted products
Vendor Product Version
kagisearch fastfeedparser Affected: < 0.5.10
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