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CVE-2026-44546— Header injection via WebSocket upgrade parser differential allows ASGI scope header spoofing

Quick assessment

Affected
djangoproject daphne
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.

daphne是Django开源的一个支持HTTP、HTTP2和WebSocket的ASGI协议服务器。 daphne 4.2.2之前版本存在安全漏洞，该漏洞源于解析器差异，可能导致攻击者向ASGI作用域注入额外标头。

CVSS 3.7 · Low EPSS 0.17% · P7

Affected Version Matrix 2

VendorProduct Version RangeStatus
djangoproject daphne 4.2.0≤ 4.2.1 affected
4.2.2 unaffected
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I. Basic Information for CVE-2026-44546

Vulnerability Information
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Vulnerability Title
Header injection via WebSocket upgrade parser differential allows ASGI scope header spoofing
Source: CVE Program / CVE List V5
Vulnerability Description
daphne before 4.2.2 reconstructs a raw HTTP request from Twisted's parsed headers and feeds it to autobahn for WebSocket handshake processing. Twisted does not treat \x0b, \x0c, \x1c, \x1d, \x1e, or \x85 as header line separators, but autobahn decodes header values to str and calls splitlines(). An attacker can exploit this parser differential to inject additional headers into the ASGI scope passed to the application. daphne now rejects requests with these bytes in any header value with a 400 response.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
HTTP请求的解释不一致性(HTTP请求私运)
Source: CVE Program / CVE List V5
Vulnerability Title
daphne 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
daphne是Django开源的一个支持HTTP、HTTP2和WebSocket的ASGI协议服务器。 daphne 4.2.2之前版本存在安全漏洞，该漏洞源于解析器差异，可能导致攻击者向ASGI作用域注入额外标头。
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
djangoproject daphne 4.2.0 ~ 4.2.1 -

II. Public POCs for CVE-2026-44546

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III. Intelligence Information for CVE-2026-44546

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Same Patch Batch · djangoproject · 2026-06-03 · 7 CVEs total

CVE-2026-44545 5.3 MEDIUM Unbounded WebSocket message and frame sizes can cause unauthenticated remote denial of ser
CVE-2026-7666 3.1 LOW Potential unencrypted email transmission via STARTTLS in the SMTP backend
CVE-2026-48587 3.1 LOW Potential exposure of private data via whitespace padding in Vary header
CVE-2026-35193 3.1 LOW Potential exposure of private data via missing Vary: Authorization in UpdateCacheMiddlewar
CVE-2026-6873 3.1 LOW Signed cookie salt namespace collision in django.http.HttpRequest.get_signed_cookie
CVE-2026-8404 3.1 LOW Potential exposure of private data via case-sensitive Cache-Control directives in UpdateCa

IV. Related Vulnerabilities

Same product: daphne
Same vendor: djangoproject
Same weakness: CWE-444