wrong proxy connection reuse with credentials (curl curl)

CVE-2026-3784
MEDIUM 6.5

At a glance

Source
NVD
EPSS
EPSS 0.43 % · percentile 37 ()
State
PUBLISHED
Published
Updated
Assigner
curl
NVD status
Modified

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.

Weaknesses (CWE)

  • CWE-305 — Authentication Bypass by Primary Weakness

References

Scores

VersionScoreVectorScored by
CVSS 3.1MEDIUM 6.5CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:NCISA-ADP
CVSS 3.1MEDIUM 6.5CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:NNVD · 134c704f-9b21-4f2e-91b3-4a467353bcc0 (Secondary)

European references

CERT-FR advisories

Affected configurations (NVD CPE)

Affected products

ProductVersions
curl · curlaffected 7.7.0 < 8.14.2 ; affected 8.15.0 < 8.16.1 ; affected 8.17.0 < 8.19.0
curl · curlaffected a1d6ad26100bc493c7b04f1301b1634b7f5aa8b4 < 5f13a7645e565c5c1a06f3ef86e97afb856fb364
curl · curlaffected 8.18.0 ; affected 8.17.0 ; affected 8.16.0 ; affected 8.15.0 ; affected 8.14.1 ; affected 8.14.0

Sources

SourceLicence
CVE List (CVEProject cvelistV5)CVE Program Terms of Use
EPSS (FIRST.org)FIRST — attribution requested
ENISA EUVDENISA — reproduction authorised, source acknowledged
CERT-FR (ANSSI)Licence Ouverte / Etalab 2.0
NVD (NIST) via fkie-cad/nvd-json-data-feedsPublic domain — this product uses data from the NVD API but is not endorsed or certified by the NVD