> CVE-2026-11856

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PUBLISHED
2026-07-03 07:16
MODIFIED
2026-07-03 07:16
EPSS (Prob. Exploit)
0.69%
Top 47.8%
DATA SOURCES:
NVD 🔗 2026-07-03 FIRST EPSS 🔗 2026-10-25 OSV 🔗 2026-09-20 MSRC 🔗 2026-11-02

> 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`.

> AFFECTED_PRODUCTS

ℹ️ Aucun produit affecté n'a encore été publié par NVD pour cette CVE.

> RED HAT SECURITY ADVISORIES

Red Hat Security Advisory: curl security update
An update for curl is now available for Red Hat Enterprise Linux 10. Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System (CV...
Red Hat Security Advisory: curl security update
An update for curl is now available for Red Hat Enterprise Linux 10.0 Extended Update Support. Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulner...
Red Hat Security Advisory: Red Hat Cost Management On-Premise container image update
Updated container image for Red Hat Cost Management On-Premise is now available.
Red Hat Security Advisory: curl security update
An update for curl is now available for Red Hat Enterprise Linux 9. Red Hat Product Security has rated this update as having a security impact of Moderate. A Common Vulnerability Scoring System (CVSS...
Red Hat Security Advisory: Red Hat Update Infrastructure 5.3 security update
The latest release of Red Hat Update Infrastructure. For more details, see the product documentation.
Red Hat Security Advisory: curl security, bug fix, and enhancement update
An update for curl is now available for Red Hat Enterprise Linux 8. Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System (CVS...
Red Hat Security Advisory: curl security update
An update for curl is now available for Red Hat Enterprise Linux 9.6 Extended Update Support. Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnera...

> OSV (GOOGLE OPEN SOURCE VULNERABILITIES)

cross-origin Digest auth state leak

AFFECTED PACKAGES:
Unknown / Unknown
176 versions affected
ALIASES:
CURL-CVE-2026-11856

> HISTORIQUE DES MODIFICATIONS

Première apparition
03/07/2026 07:16
Source: NVD
Total des modifications: 0 Dernière mise à jour: 4 months ago

> REFERENCES

https://curl.se/docs/CVE-2026-11856.html
https://curl.se/docs/CVE-2026-11856.json
https://hackerone.com/reports/3793260
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