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CVE-2026-47070— HTTP/3 redirect handler leaks Authorization and Cookie headers to cross-origin redirect target in hackney

AI Predicted 5.9 Difficulty: Easy EPSS 0.04% · P13

Possible ATT&CK Techniques 1AI

T1530 · Data from Cloud Storage

Affected Version Matrix 2

VendorProductVersion RangeStatus
benoitchackney3.1.1< 4.0.1affected
e61b7d04b7826847e1efe614106ef4d580c78eab< c58d5b50bade146360b85caf3dc8065807b08246affected
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I. Basic Information for CVE-2026-47070

Vulnerability Information
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Vulnerability Title
HTTP/3 redirect handler leaks Authorization and Cookie headers to cross-origin redirect target in hackney
Source: NVD (National Vulnerability Database)
Vulnerability Description
Sensitive Data Exposure vulnerability in benoitc hackney allows Retrieve Embedded Sensitive Data. The HTTP/3 redirect handler in src/hackney_h3.erl passes the original request headers unchanged to the redirect target without performing any cross-origin check. When a client issues an HTTP/3 request with follow_redirect enabled and includes Authorization or Cookie headers, a server responding with a 3xx redirect to a different host will cause the client to forward those credentials verbatim to the new origin. The main hackney.erl module has maybe_strip_auth_on_redirect/2 (guarded by the location_trusted option) to address CVE-2018-1000007, but hackney_h3.erl is missing this protection entirely. This issue affects hackney: from 3.1.1 before 4.0.1.
Source: NVD (National Vulnerability Database)
CVSS Information
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Type
指向未可信站点的URL重定向(开放重定向)
Source: NVD (National Vulnerability Database)

Affected Products

VendorProductAffected VersionsCPESubscribe
benoitchackney 3.1.1 ~ 4.0.1 cpe:2.3:a:benoitc:hackney:*:*:*:*:*:*:*:*
benoitchackney e61b7d04b7826847e1efe614106ef4d580c78eab ~ c58d5b50bade146360b85caf3dc8065807b08246 cpe:2.3:a:benoitc:hackney:*:*:*:*:*:*:*:*

II. Public POCs for CVE-2026-47070

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III. Intelligence Information for CVE-2026-47070

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Patches & Fixes for CVE-2026-47070 (1)

Vendor Advisories for CVE-2026-47070 (3)

Same Patch Batch · benoitc · 2026-05-25 · 10 CVEs total

CVE-2026-47069CRLF injection in cookie domain/path options in hackney
CVE-2026-47076SSRF allowlist bypass via percent-encoded host in hackney
CVE-2026-47073Unbounded memory consumption in WebSocket client in hackney
CVE-2026-47075CR/LF injection in query parameter in hackney
CVE-2026-47072CRLF injection in WebSocket upgrade request in hackney
CVE-2026-47077Unbounded body accumulation in HTTP/3 response loop in hackney
CVE-2026-47067Atom table exhaustion via unrecognized URL schemes in hackney
CVE-2026-47071SOCKS5 TLS upgrade ignores caller timeout in hackney
CVE-2026-47066Infinite loop in Alt-Svc header parser in hackney

IV. Related Vulnerabilities

Same product: hackney
Same vendor: benoitc
Same weakness: CWE-601

V. Comments for CVE-2026-47070

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