CVE-2026-49846— libks has path traversal in kws HTTP parser via URI segment overflow
Quick assessment
Affected
signalwire libks
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.
signalwire libks是signalwire公司开源的一款提供基础编程工具与常用组件的软件开发库。 signalwire libks 2.0.11之前版本存在安全漏洞，该漏洞源于HTTP请求解析器中的clean_uri()未能拒绝路径段数超过其内部规范化缓冲区容量的URI，导致嵌入的".."序列被保留并通过，可能造成路径遍历。
Possible ATT&CK Techniques 1 AI
T1079Affected Version Matrix 1
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| signalwire | libks | < 2.0.11 |
affected |
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I. Basic Information for CVE-2026-49846
Vulnerability Information
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Vulnerability Title
libks has path traversal in kws HTTP parser via URI segment overflow
Source: CVE Program / CVE List V5
Vulnerability Description
libks provides foundational support for signalwire C products. Prior to version 2.0.11, `clean_uri()` in libks's HTTP request parser fails to reject URIs whose path has more segments than its internal canonicalization buffer can hold. The canonicalization step silently passes such URIs through with embedded ".." sequences intact, enabling path traversal in any consumer that later joins the URI with a filesystem path. Version 2.0.11 patches the issue.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
对路径名的限制不恰当(路径遍历)
Source: CVE Program / CVE List V5
Vulnerability Title
signalwire libks 路径遍历漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
signalwire libks是signalwire公司开源的一款提供基础编程工具与常用组件的软件开发库。 signalwire libks 2.0.11之前版本存在安全漏洞，该漏洞源于HTTP请求解析器中的clean_uri()未能拒绝路径段数超过其内部规范化缓冲区容量的URI，导致嵌入的".."序列被保留并通过，可能造成路径遍历。
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 |
|---|---|---|---|---|
| signalwire | libks | < 2.0.11 | - |
|
II. Public POCs for CVE-2026-49846
| # | POC Description | Source Link | Shenlong Link |
|---|
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Vendor Advisories for CVE-2026-49846 (1)
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V. Comments for CVE-2026-49846
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