Successfully using libcurl to do a transfer over a specific HTTP proxy
(`proxyA`) with **Digest** authentication and then changing the proxy host to
a second one (`proxyB`) for a second transfer, reusing the same handle, makes
libcurl wrongly pass on the `Proxy-Authorization:` header field meant for
`proxyA`, to `proxyB`.

No CVSS v4.0

No CVSS v3.1

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

No EPSS score available.

Key SSVC decision points have not yet been added.

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions
curl curl unaffected
Version Status Constraints
8.19.0 affected ≤ 8.19.0
8.18.0 affected ≤ 8.18.0
8.17.0 affected ≤ 8.17.0
8.16.0 affected ≤ 8.16.0
8.15.0 affected ≤ 8.15.0
8.14.1 affected ≤ 8.14.1
8.14.0 affected ≤ 8.14.0
8.13.0 affected ≤ 8.13.0
8.12.1 affected ≤ 8.12.1
8.12.0 affected ≤ 8.12.0
8.11.1 affected ≤ 8.11.1
8.11.0 affected ≤ 8.11.0
8.10.1 affected ≤ 8.10.1
8.10.0 affected ≤ 8.10.0
8.9.1 affected ≤ 8.9.1
8.9.0 affected ≤ 8.9.0
8.8.0 affected ≤ 8.8.0
8.7.1 affected ≤ 8.7.1
8.7.0 affected ≤ 8.7.0
8.6.0 affected ≤ 8.6.0
8.5.0 affected ≤ 8.5.0
8.4.0 affected ≤ 8.4.0
8.3.0 affected ≤ 8.3.0
8.2.1 affected ≤ 8.2.1
8.2.0 affected ≤ 8.2.0
8.1.2 affected ≤ 8.1.2
8.1.1 affected ≤ 8.1.1
8.1.0 affected ≤ 8.1.0
8.0.1 affected ≤ 8.0.1
8.0.0 affected ≤ 8.0.0
7.88.1 affected ≤ 7.88.1
7.88.0 affected ≤ 7.88.0
7.87.0 affected ≤ 7.87.0
7.86.0 affected ≤ 7.86.0
7.85.0 affected ≤ 7.85.0
7.84.0 affected ≤ 7.84.0
7.83.1 affected ≤ 7.83.1
7.83.0 affected ≤ 7.83.0
7.82.0 affected ≤ 7.82.0
7.81.0 affected ≤ 7.81.0
7.80.0 affected ≤ 7.80.0
7.79.1 affected ≤ 7.79.1
7.79.0 affected ≤ 7.79.0
7.78.0 affected ≤ 7.78.0
7.77.0 affected ≤ 7.77.0
7.76.1 affected ≤ 7.76.1
7.76.0 affected ≤ 7.76.0
7.75.0 affected ≤ 7.75.0
7.74.0 affected ≤ 7.74.0
7.73.0 affected ≤ 7.73.0
7.72.0 affected ≤ 7.72.0
7.71.1 affected ≤ 7.71.1
7.71.0 affected ≤ 7.71.0
7.70.0 affected ≤ 7.70.0
7.69.1 affected ≤ 7.69.1
7.69.0 affected ≤ 7.69.0
7.68.0 affected ≤ 7.68.0
7.67.0 affected ≤ 7.67.0
7.66.0 affected ≤ 7.66.0
7.65.3 affected ≤ 7.65.3
7.65.2 affected ≤ 7.65.2
7.65.1 affected ≤ 7.65.1
7.65.0 affected ≤ 7.65.0
7.64.1 affected ≤ 7.64.1
7.64.0 affected ≤ 7.64.0
7.63.0 affected ≤ 7.63.0
7.62.0 affected ≤ 7.62.0
7.61.1 affected ≤ 7.61.1
7.61.0 affected ≤ 7.61.0
7.60.0 affected ≤ 7.60.0
7.59.0 affected ≤ 7.59.0
7.58.0 affected ≤ 7.58.0
7.57.0 affected ≤ 7.57.0
7.56.1 affected ≤ 7.56.1
7.56.0 affected ≤ 7.56.0
7.55.1 affected ≤ 7.55.1
7.55.0 affected ≤ 7.55.0
7.54.1 affected ≤ 7.54.1
7.54.0 affected ≤ 7.54.0
7.53.1 affected ≤ 7.53.1
7.53.0 affected ≤ 7.53.0
7.52.1 affected ≤ 7.52.1
7.52.0 affected ≤ 7.52.0
7.51.0 affected ≤ 7.51.0
7.50.3 affected ≤ 7.50.3
7.50.2 affected ≤ 7.50.2
7.50.1 affected ≤ 7.50.1
7.50.0 affected ≤ 7.50.0
7.49.1 affected ≤ 7.49.1
7.49.0 affected ≤ 7.49.0
7.48.0 affected ≤ 7.48.0
7.47.1 affected ≤ 7.47.1
7.47.0 affected ≤ 7.47.0
7.46.0 affected ≤ 7.46.0
7.45.0 affected ≤ 7.45.0
7.44.0 affected ≤ 7.44.0
7.43.0 affected ≤ 7.43.0
7.42.1 affected ≤ 7.42.1
7.42.0 affected ≤ 7.42.0
7.41.0 affected ≤ 7.41.0
7.40.0 affected ≤ 7.40.0
7.39.0 affected ≤ 7.39.0
7.38.0 affected ≤ 7.38.0
7.37.1 affected ≤ 7.37.1
7.37.0 affected ≤ 7.37.0
7.36.0 affected ≤ 7.36.0
7.35.0 affected ≤ 7.35.0
7.34.0 affected ≤ 7.34.0
7.33.0 affected ≤ 7.33.0
7.32.0 affected ≤ 7.32.0
7.31.0 affected ≤ 7.31.0
7.30.0 affected ≤ 7.30.0
7.29.0 affected ≤ 7.29.0
7.28.1 affected ≤ 7.28.1
7.28.0 affected ≤ 7.28.0
7.27.0 affected ≤ 7.27.0
7.26.0 affected ≤ 7.26.0
7.25.0 affected ≤ 7.25.0
7.24.0 affected ≤ 7.24.0
7.23.1 affected ≤ 7.23.1
7.23.0 affected ≤ 7.23.0
7.22.0 affected ≤ 7.22.0
7.21.7 affected ≤ 7.21.7
7.21.6 affected ≤ 7.21.6
7.21.5 affected ≤ 7.21.5
7.21.4 affected ≤ 7.21.4
7.21.3 affected ≤ 7.21.3
7.21.2 affected ≤ 7.21.2
7.21.1 affected ≤ 7.21.1
7.21.0 affected ≤ 7.21.0
7.20.1 affected ≤ 7.20.1
7.20.0 affected ≤ 7.20.0
7.19.7 affected ≤ 7.19.7
7.19.6 affected ≤ 7.19.6
7.19.5 affected ≤ 7.19.5
7.19.4 affected ≤ 7.19.4
7.19.3 affected ≤ 7.19.3
7.19.2 affected ≤ 7.19.2
7.19.1 affected ≤ 7.19.1
7.19.0 affected ≤ 7.19.0
7.18.2 affected ≤ 7.18.2
7.18.1 affected ≤ 7.18.1
7.18.0 affected ≤ 7.18.0
7.17.1 affected ≤ 7.17.1
7.17.0 affected ≤ 7.17.0
7.16.4 affected ≤ 7.16.4
7.16.3 affected ≤ 7.16.3
7.16.2 affected ≤ 7.16.2
7.16.1 affected ≤ 7.16.1
7.16.0 affected ≤ 7.16.0
7.15.5 affected ≤ 7.15.5
7.15.4 affected ≤ 7.15.4
7.15.3 affected ≤ 7.15.3
7.15.2 affected ≤ 7.15.2
7.15.1 affected ≤ 7.15.1
7.15.0 affected ≤ 7.15.0
7.14.1 affected ≤ 7.14.1
7.14.0 affected ≤ 7.14.0
7.13.2 affected ≤ 7.13.2
7.13.1 affected ≤ 7.13.1
7.13.0 affected ≤ 7.13.0
7.12.3 affected ≤ 7.12.3
7.12.2 affected ≤ 7.12.2
7.12.1 affected ≤ 7.12.1
7.12.0 affected ≤ 7.12.0

No data.

No data.

No data.

Project Subscriptions

No data.

Advisories
Source ID Title
Ubuntu USN Ubuntu USN USN-8227-1 curl vulnerabilities
Fixes

Solution

No solution given by the vendor.

Workaround

No workaround given by the vendor.

References
Link Providers
https://curl.se/docs/CVE-2026-7168.html cve-icon
https://curl.se/docs/CVE-2026-7168.json cve-icon
https://hackerone.com/reports/3697719 cve-icon
History

Wed, 13 May 2026 09:15:00 +0000

Type Values Removed Values Added
Description Successfully using libcurl to do a transfer over a specific HTTP proxy (`proxyA`) with **Digest** authentication and then changing the proxy host to a second one (`proxyB`) for a second transfer, reusing the same handle, makes libcurl wrongly pass on the `Proxy-Authorization:` header field meant for `proxyA`, to `proxyB`.
Title cross-proxy Digest auth state leak
References

Projects

Sign in to view the affected projects.

cve-icon MITRE

Status: PUBLISHED

Assigner: curl

Published:

Updated: 2026-05-13T09:05:54.907Z

Reserved: 2026-04-27T07:37:37.172Z

Link: CVE-2026-7168

cve-icon Vulnrichment

No data.

cve-icon NVD

No data.

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

No data.

Weaknesses

No weakness.