CVE-2026-11856

9.8 Critique

Publiée le 03/07/2026 à 09:16 · Modifiée le 15/09/2026 à 09:16 · Modifiée · Source : 2499f714-1537-4658-8207-48ae4bb9eae9

Description

Successfully using libcurl to do a transfer to a specific HTTP origin (`hostA`) with **Digest** authentication and then changing the origin to a different one (`hostB`) for a second transfer, reusing the same handle, makes libcurl wrongly pass on the `Authorization:` header field meant for `hostA`, to `hostB`.

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Produits concernés

curl
Haxx curl

Scores CVSS

Version	Score	Source	Vecteur
3.1	9.8 Critique	134c704f-9b21-4f2e-91b3-4a467353bcc0	`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H`

Faiblesses (CWE)

CWE-294

Références

https://curl.se/docs/CVE-2026-11856.html PatchVendor Advisory
https://curl.se/docs/CVE-2026-11856.json Vendor Advisory
https://hackerone.com/reports/3793260 ExploitIssue TrackingThird Party Advisory
https://hackerone.com/reports/3793260 ExploitIssue TrackingThird Party Advisory

Ailleurs

NVD
CVE.org
CIRCL Vulnerability-Lookup
CERT-FR
GitHub Advisories