CVE-2026-47070

6.1 MEDIUM
Published: May 25, 2026 Modified: May 27, 2026
View on NVD

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.

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CVSS v3.x Details

0.0 Low Medium High Critical 10.0
Vector String
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

References to Advisories, Solutions, and Tools

Patch Vendor Advisory Exploit Third Party Advisory
https://cna.erlef.org/cves/CVE-2026-47070.html
Source: 6b3ad84c-e1a6-4bf7-a703-f496b71e49db
Third Party Advisory Patch
https://github.com/benoitc/hackney/security/advisories/GHSA-h73q-4w9q-82h4
Source: 6b3ad84c-e1a6-4bf7-a703-f496b71e49db
Exploit Patch Vendor Advisory
https://osv.dev/vulnerability/EEF-CVE-2026-47070
Source: 6b3ad84c-e1a6-4bf7-a703-f496b71e49db
Third Party Advisory Patch
https://github.com/benoitc/hackney/security/advisories/GHSA-h73q-4w9q-82h4
Source: 134c704f-9b21-4f2e-91b3-4a467353bcc0
Exploit Patch Vendor Advisory

5 reference(s) from NVD

Quick Stats

CVSS v3 Score
6.1 / 10.0
EPSS (Exploit Probability)
0.3%
24th percentile
Exploitation Status
Not in CISA KEV

Weaknesses (CWE)

Affected Vendors

benoitc