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Vulnerabilities

Vulnerability · CVE-2026-56860

Avoid quadratic complexity in resolvePath in net/url

Published Aug 13, 2026 · catalog updated Oct 15, 2026 · Avoid quadratic complexity in

Check if you run it

No confirmed exploitation is on record for CVE-2026-56860. EPSS is 0.55%. Act only if a listed version of Avoid quadratic complexity in is installed.

Gaps on this record

  • The stored product name is a package slug. The name on this page is taken from the title (Avoid quadratic complexity in).
  • No vendor fix or required action is stored. Compare the linked advisory before you change production.
Severity
Unknown—
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
0.55%
Remediation
Not established
Affected products
Go stdlib

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.

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • Go stdlib0 → 1.25.13

How to fix CVE-2026-56860

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

No confirmed exploitation is on record for CVE-2026-56860. EPSS is 0.55%. Act only if a listed version of Avoid quadratic complexity in is installed.

Which versions are affected?

Compare what you have installed with 0 → 1.25.13. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

No weakness class is stored. EPSS 0.55%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Code

The project this record applies to. Exploit listings stay in References.

No public source repository is identified for this product.

Timeline

Detection, updates, and resolution for this record.

  1. Aug 13, 2026 · Catalog

    Detected

    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 allocat

  2. Oct 10, 2026 · Catalog

    Fix available

    Go stdlib 0 → 1.25.13

  3. Oct 10, 2026 · OpenSSF OSV / OSV Scanner

    Fix available

    stdlib fixed in 1.25.13

  4. Oct 10, 2026 · OpenSSF OSV / OSV Scanner

    Fix available

    stdlib fixed in 1.25.13

  5. Oct 10, 2026 · Catalog

    Updated

    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 allocat

  6. Oct 15, 2026 · OpenSSF OSV / OSV Scanner

    Updated

    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 allocat

Sources

References

Freshness

Last verified in this catalog Oct 18, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.