CVE-2026-56860
Medium
Description
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.
SeverityMedium
CVSS5.9
Exploit probability—
ProductStdlib
PublishedAug 13, 2026
First seenAug 13, 2026
Weakness typeCWE-407CWE-407
How to fix
Update
- stdlib1.25.13, 1.26.6, 1.27.0-rc.3 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| stdlibGo | v < 1.25.13, 1.26.0-0 ≤ v < 1.26.6, 1.27.0-0 ≤ v < 1.27.0-rc.3 | 1.25.13, 1.26.6, 1.27.0-rc.3 |
Check your version
Choose the product and enter the version you run to see whether it falls in the affected range.
In the Intelligence 360 plan
Attack Surface Management
See the assets tied to your domains, the technologies they run and known vulnerabilities in one list.