CVE-2026-3784
medium
CVSS v3
6.5
CVSS v4 NEW
—
VIR risk
6.5
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.
Predictions
Exploit likelihood
75%
Patch ETA
—
Heuristic predictions, AS-IS, for prioritization only.
Mitigations
No mitigations published for this CVE yet.
The vendor-content worker queues fetches as references arrive (check back in a few minutes). Or — if you've already worked around this in production — publish your fix to the community-verified tier.
✚ Propose a mitigation on Community → Mitigations published via the community go through AI scoring + 2 human reviewers + 7-day silent objection window before landing here withsource_tier=community-verified.
OS impact
SUSE Affected 1 release
| Version | Status | Fixed in |
|---|---|---|
| — | Affected | — |
Debian Mixed 5 releases
| Version | Status | Fixed in |
|---|---|---|
| trixie | Affected | — |
| sid | Fixed | 8.19.0-1 |
| forky | Fixed | 8.19.0-1 |
| bullseye | Affected | — |
| bookworm | Affected | — |
Application impact
| Vendor | Product | Versions | Fixed |
|---|---|---|---|
| haxx | curl | {"startIncluding":"7.7","endExcluding":"8.18.0"} | 8.18.0 |
References
- https://security-tracker.debian.org/tracker/CVE-2026-3784
- https://www.suse.com/security/cve/CVE-2026-3784.html
- https://curl.se/docs/CVE-2026-3784.html
- https://curl.se/docs/CVE-2026-3784.json
- https://hackerone.com/reports/3584903
- http://www.openwall.com/lists/oss-security/2026/03/11/3
- https://cert-portal.siemens.com/productcert/html/ssa-253495.html
CWEs
CWE-305
Community-verified mitigations for this CVE will appear above when contributors publish them.
Verify integrity in audit chain (admin only). AS-IS.