CVE-2026-56860— Avoid quadratic complexity in resolvePath in net/url
Quick assessment
Affected
Go standard library net/url
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.
Google Go是美国Google公司开源的一款支持并发编程的脚本语言。 Google Go 1.25.13之前版本、1.26.6之前版本和1.27.0-rc.3之前版本存在资源管理错误漏洞，该漏洞源于net/url在解析包含父目录（'..'）的相对路径时执行字符串转换和缓冲区重写，导致二次时间复杂度和高内存分配开销。
Possible ATT&CK Techniques 1 AI
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 |
Get alerts for future matching vulnerabilities
Log in to subscribe
I. Basic Information for CVE-2026-56860
Vulnerability Information
Have questions about the vulnerability? See if Shenlong's analysis helps!
View Shenlong Deep Dive ↗
Although we use advanced large model technology, its output may still contain inaccurate or outdated information.Shenlong tries to ensure data accuracy, but please verify and judge based on the actual situation.
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
Vulnerability Title
Google Go 资源管理错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Google Go是美国Google公司开源的一款支持并发编程的脚本语言。 Google Go 1.25.13之前版本、1.26.6之前版本和1.27.0-rc.3之前版本存在资源管理错误漏洞，该漏洞源于net/url在解析包含父目录（'..'）的相对路径时执行字符串转换和缓冲区重写，导致二次时间复杂度和高内存分配开销。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
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 |
|---|
AI-Generated POC
Premium
No public POC found.
Login to generate AI POCIII. Intelligence Information for CVE-2026-56860
请登录查看更多情报信息。
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 product: net/url
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
No comments yet