CVE-2026-56860— Avoid quadratic complexity in resolvePath in net/url
Possible ATT&CK Techniques 1AI
T1496 · Resource HijackingAffected Version Matrix 3
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| Go standard library | net/url | < 1.25.13 | affected |
1.26.0-0< 1.26.6 | affected | ||
1.27.0-0< 1.27.0-rc.3 | affected |
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I. Basic Information for CVE-2026-56860
Vulnerability Information
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Vulnerability Title
Avoid quadratic complexity in resolvePath in net/url
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5
Affected Products
| Vendor | Product | Affected Versions | CPE | Subscribe |
|---|---|---|---|---|
| Go standard library | net/url | 0 ~ 1.25.13 | - |
II. Public POCs for CVE-2026-56860
| # | POC Description | Source Link | Shenlong Link |
|---|
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Vendor Advisories for CVE-2026-56860 (3)
Same Patch Batch · Go standard library · 2026-08-13 · 6 CVEs total
| CVE-2026-56862 | Limit handshake messages we are willing to accept post-handshake in crypto/tls | |
| CVE-2026-56859 | Add recursion depth guard during decode in encoding/xml | |
| CVE-2026-56858 | Fix Javascript regexp context tracking in html/template | |
| CVE-2026-56853 | Apply ReadHeaderTimeout when doing unencrypted HTTP/2 check in net/http | |
| CVE-2026-33818 | Enforce maximum recursion depth in encoding/asn1 |
IV. Related Vulnerabilities
Same vendor: Go standard library
- CVE-2026-56862
Limit handshake messages we are willing to accept post-hands - CVE-2026-33818
Enforce maximum recursion depth in encoding/asn1 - CVE-2026-56859
Add recursion depth guard during decode in encoding/xml - CVE-2026-56858
Fix Javascript regexp context tracking in html/template - CVE-2026-56853
Apply ReadHeaderTimeout when doing unencrypted HTTP/2 check
V. Comments for CVE-2026-56860
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