CVE-2026-3784 | THREATINT

Description

curl would wrongly reuse an existing HTTP proxy connection doing CONNECT to a server, even if the new request uses different credentials for the HTTP proxy. The proper behavior is to create or use a separate connection.

PUBLISHED Reserved 2026-03-08 | Published 2026-03-11 | Updated 2026-03-11 | Assigner curl

Problem types

CWE-305 Authentication Bypass by Primary Weakness

Product status

Default status

unaffected

8.18.0 (semver)

affected

8.17.0 (semver)

affected

8.16.0 (semver)

affected

8.15.0 (semver)

affected

8.14.1 (semver)

affected

8.14.0 (semver)

affected

8.13.0 (semver)

affected

8.12.1 (semver)

affected

8.12.0 (semver)

affected

8.11.1 (semver)

affected

8.11.0 (semver)

affected

8.10.1 (semver)

affected

8.10.0 (semver)

affected

8.9.1 (semver)

affected

8.9.0 (semver)

affected

8.8.0 (semver)

affected

8.7.1 (semver)

affected

8.7.0 (semver)

affected

8.6.0 (semver)

affected

8.5.0 (semver)

affected

8.4.0 (semver)

affected

8.3.0 (semver)

affected

8.2.1 (semver)

affected

8.2.0 (semver)

affected

8.1.2 (semver)

affected

8.1.1 (semver)

affected

8.1.0 (semver)

affected

8.0.1 (semver)

affected

8.0.0 (semver)

affected

7.88.1 (semver)

affected

7.88.0 (semver)

affected

7.87.0 (semver)

affected

7.86.0 (semver)

affected

7.85.0 (semver)

affected

7.84.0 (semver)

affected

7.83.1 (semver)

affected

7.83.0 (semver)

affected

7.82.0 (semver)

affected

7.81.0 (semver)

affected

7.80.0 (semver)

affected

7.79.1 (semver)

affected

7.79.0 (semver)

affected

7.78.0 (semver)

affected

7.77.0 (semver)

affected

7.76.1 (semver)

affected

7.76.0 (semver)

affected

7.75.0 (semver)

affected

7.74.0 (semver)

affected

7.73.0 (semver)

affected

7.72.0 (semver)

affected

7.71.1 (semver)

affected

7.71.0 (semver)

affected

7.70.0 (semver)

affected

7.69.1 (semver)

affected

7.69.0 (semver)

affected

7.68.0 (semver)

affected

7.67.0 (semver)

affected

7.66.0 (semver)

affected

7.65.3 (semver)

affected

7.65.2 (semver)

affected

7.65.1 (semver)

affected

7.65.0 (semver)

affected

7.64.1 (semver)

affected

7.64.0 (semver)

affected

7.63.0 (semver)

affected

7.62.0 (semver)

affected

7.61.1 (semver)

affected

7.61.0 (semver)

affected

7.60.0 (semver)

affected

7.59.0 (semver)

affected

7.58.0 (semver)

affected

7.57.0 (semver)

affected

7.56.1 (semver)

affected

7.56.0 (semver)

affected

7.55.1 (semver)

affected

7.55.0 (semver)

affected

7.54.1 (semver)

affected

7.54.0 (semver)

affected

7.53.1 (semver)

affected

7.53.0 (semver)

affected

7.52.1 (semver)

affected

7.52.0 (semver)

affected

7.51.0 (semver)

affected

7.50.3 (semver)

affected

7.50.2 (semver)

affected

7.50.1 (semver)

affected

7.50.0 (semver)

affected

7.49.1 (semver)

affected

7.49.0 (semver)

affected

7.48.0 (semver)

affected

7.47.1 (semver)

affected

7.47.0 (semver)

affected

7.46.0 (semver)

affected

7.45.0 (semver)

affected

7.44.0 (semver)

affected

7.43.0 (semver)

affected

7.42.1 (semver)

affected

7.42.0 (semver)

affected

7.41.0 (semver)

affected

7.40.0 (semver)

affected

7.39.0 (semver)

affected

7.38.0 (semver)

affected

7.37.1 (semver)

affected

7.37.0 (semver)

affected

7.36.0 (semver)

affected

7.35.0 (semver)

affected

7.34.0 (semver)

affected

7.33.0 (semver)

affected

7.32.0 (semver)

affected

7.31.0 (semver)

affected

7.30.0 (semver)

affected

7.29.0 (semver)

affected

7.28.1 (semver)

affected

7.28.0 (semver)

affected

7.27.0 (semver)

affected

7.26.0 (semver)

affected

7.25.0 (semver)

affected

7.24.0 (semver)

affected

7.23.1 (semver)

affected

7.23.0 (semver)

affected

7.22.0 (semver)

affected

7.21.7 (semver)

affected

7.21.6 (semver)

affected

7.21.5 (semver)

affected

7.21.4 (semver)

affected

7.21.3 (semver)

affected

7.21.2 (semver)

affected

7.21.1 (semver)

affected

7.21.0 (semver)

affected

7.20.1 (semver)

affected

7.20.0 (semver)

affected

7.19.7 (semver)

affected

7.19.6 (semver)

affected

7.19.5 (semver)

affected

7.19.4 (semver)

affected

7.19.3 (semver)

affected

7.19.2 (semver)

affected

7.19.1 (semver)

affected

7.19.0 (semver)

affected

7.18.2 (semver)

affected

7.18.1 (semver)

affected

7.18.0 (semver)

affected

7.17.1 (semver)

affected

7.17.0 (semver)

affected

7.16.4 (semver)

affected

7.16.3 (semver)

affected

7.16.2 (semver)

affected

7.16.1 (semver)

affected

7.16.0 (semver)

affected

7.15.5 (semver)

affected

7.15.4 (semver)

affected

7.15.3 (semver)

affected

7.15.2 (semver)

affected

7.15.1 (semver)

affected

7.15.0 (semver)

affected

7.14.1 (semver)

affected

7.14.0 (semver)

affected

7.13.2 (semver)

affected

7.13.1 (semver)

affected

7.13.0 (semver)

affected

7.12.3 (semver)

affected

7.12.2 (semver)

affected

7.12.1 (semver)

affected

7.12.0 (semver)

affected

7.11.2 (semver)

affected

7.11.1 (semver)

affected

7.11.0 (semver)

affected

7.10.8 (semver)

affected

7.10.7 (semver)

affected

7.10.6 (semver)

affected

7.10.5 (semver)

affected

7.10.4 (semver)

affected

7.10.3 (semver)

affected

7.10.2 (semver)

affected

7.10.1 (semver)

affected

7.10 (semver)

affected

7.9.8 (semver)

affected

7.9.7 (semver)

affected

7.9.6 (semver)

affected

7.9.5 (semver)

affected

7.9.4 (semver)

affected

7.9.3 (semver)

affected

7.9.2 (semver)

affected

7.9.1 (semver)

affected

7.9 (semver)

affected

7.8.1 (semver)

affected

7.8 (semver)

affected

7.7.3 (semver)

affected

7.7.2 (semver)

affected

7.7.1 (semver)

affected

7.7 (semver)

affected

Credits

Muhamad Arga Reksapati (HackerOne: nobcoder) finder

Stefan Eissing remediation developer

References

www.openwall.com/lists/oss-security/2026/03/11/3

curl.se/docs/CVE-2026-3784.json (json)

curl.se/docs/CVE-2026-3784.html (www)

hackerone.com/reports/3584903 (issue)

cve.org (CVE-2026-3784)

nvd.nist.gov (CVE-2026-3784)

Download JSON