CVE-2026-47070Sensitive Data Exposure vulnerability in benoitc hackney allows Retrieve Embedded Sensitive Data.
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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.
- CVSS
- 6.1 MEDIUM (v3.1, NVD)CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
- Weakness (CWE)
- CWE-601
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Not given
- NVD analysis
- Analyzed
- Record last updated
- Jul 24, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
benoitc hackney benoitc:hackney | from 3.1.1 before 4.0.1 | NVD |
References
- https://cna.erlef.org/cves/CVE-2026-47070.htmlpatch, third-party-advisory
- https://github.com/benoitc/hackney/commit/c58d5b50bade146360b85caf3dc8065807b08246patch
- https://github.com/benoitc/hackney/security/advisories/GHSA-h73q-4w9q-82h4exploit, patch, vendor-advisory
- https://osv.dev/vulnerability/EEF-CVE-2026-47070patch, third-party-advisory
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.