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CVE-2025-10148— predictable WebSocket mask

Quick assessment

Affected
curl curl
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.

curl是cURL开源的一款用于从服务器传输数据或向服务器传输数据的工具。 curl存在安全漏洞，该漏洞源于websocket代码未按照规范为每个新出站帧更新32位掩码模式，而是使用固定掩码，可能导致恶意服务器诱导流量被代理服务器误认为真实HTTP流量，从而污染其缓存。

AI Predicted 6.5 Difficulty: Moderate EPSS 0.50% · P41

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application

Affected Version Matrix 11

VendorProduct Version RangeStatus
curl curl 8.11.0< 8.14.2 affected
8.15.0< 8.16.0 affected
d78e129d50b2d190f1c1bde2ad1f62f02f152db0< 84db7a9eae8468c0445b15aa806fa7fa806fa0f2 affected
8.15.0 affected
8.14.1 affected
8.14.0 affected
8.13.0 affected
8.12.1 affected
… +3 more rows
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I. Basic Information for CVE-2025-10148

Vulnerability Information
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Vulnerability Title
predictable WebSocket mask
Source: CVE Program / CVE List V5
Vulnerability Description
curl's WebSocket code did not update the 32-bit mask pattern for each new outgoing frame as the specification says. Instead it used a fixed mask that persisted and was used throughout the entire connection. A predictable mask pattern allows for a malicious server to induce traffic between the two communicating parties that could be interpreted by an involved proxy (configured or transparent) as genuine, real, HTTP traffic with content and thereby poison its cache. That cached poisoned content could then be served to all users of that proxy.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
可预测问题
Source: CVE Program / CVE List V5
Vulnerability Title
curl 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
curl是cURL开源的一款用于从服务器传输数据或向服务器传输数据的工具。 curl存在安全漏洞，该漏洞源于websocket代码未按照规范为每个新出站帧更新32位掩码模式，而是使用固定掩码，可能导致恶意服务器诱导流量被代理服务器误认为真实HTTP流量，从而污染其缓存。
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
curl curl 8.11.0 ~ 8.14.2 -
curl curl d78e129d50b2d190f1c1bde2ad1f62f02f152db0 ~ 84db7a9eae8468c0445b15aa806fa7fa806fa0f2 -
curl curl 8.15.0 -

II. Public POCs for CVE-2025-10148

# POC Description Source Link Shenlong Link
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III. Intelligence Information for CVE-2025-10148

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Vendor Advisories for CVE-2025-10148 (1)

Proof of Concept for CVE-2025-10148 (1)

IV. Related Vulnerabilities

Same product: curl
Same vendor: curl
Same weakness: CWE-340

V. Comments for CVE-2025-10148

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