CVE-2026-56860: medium-severity vulnerability in Go standard library net/url
Avoid quadratic complexity in resolvePath in net/url
Published · Updated
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13Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 5.9epss 0.5%
Previously, resolving relative paths containing parent directory ('..') segments performed string conversions and buffer rewrites on each step, resulting in quadratic time complexity and high memory allocation overhead. Now, path resolution operates on a byte buffer using index-based backtracking for '..' segments, eliminating the quadratic time complexity and significantly reducing memory allocations.
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
Affected products
Go standard library · net/urlRelated CVEs — Go standard library net/url
In the same product, most dangerous first.
CVE-2025-61726HIGHMemory exhaustion in query parameter parsing in net/urlEPSS 2.3%CVE-2022-32190—Failure to strip relative path components in net/urlEPSS 2.2%CVE-2026-25679HIGHIncorrect parsing of IPv6 host literals in net/urlEPSS 0.8%CVE-2025-47912MEDIUMInsufficient validation of bracketed IPv6 hostnames in net/urlEPSS 0.5%