CVE-2026-56860High· 7.5▾ TwilightAvoid quadratic complexity in resolvePath in net/url
▾ Twilight zone — High severity, or a signal on a lesser flaw
impact 41.3 · likelihood 0.1 · exploitation 0
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Exploit-prediction probability, daily snapshots since Aug 14.
Disclosure to exploitation, from the record and what we observed since indexing it.
Disclosed via OSV
0.2%
0.2% → 0.5%
7.5 → —
high → none
— → 7.5
none → high
7.5 → —
high → none
— → 7.5
none → high
7.5 → —
high → none
— → 7.5
none → high
Last analysed / modified upstream
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.
stdlib >= 1.27.0-0, < 1.27.0-rc.3Upgrade to a patched release:
stdlib 1.27.0-rc.3Field changes observed since this record was first indexed.
Connected by shared product, vendor, weakness, or advisory.
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