MEDIUM
CVE-2026-3784
Published: March 11, 2026· Updated: Mar 12, 2026
6.5
CVSS v3.1
EPSS:0.03%probability of exploitation in 30 daysPercentile:6.9th
Official 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.
Technical Analysis
CVE-2026-3784 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.
The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.
CVSS v3.1 Vector Breakdown
Exploitability
Attack VectorNetwork
Attack ComplexityLow
Privileges Req.None
User InteractionNone
ScopeUnchanged
Impact
ConfidentialityLow
IntegrityLow
AvailabilityNone
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N
Affected Vendors & Products
haxx1 product
curl
Source: NVD CPE · 1 total CPE entries
Exploit & PoC Resources
NO KNOWN EXPLOITNo public exploit confirmed at this time
Exploit-DB
Offensive Security exploit database
GitHub PoC Search
Community PoC repositories
Rapid7 / Metasploit
Metasploit module search
PacketStorm
Security advisories & exploits
NVD Detail
Official NIST entry
MITRE CVE
CVE Program entry
External links open in a new tab. Always verify in a controlled environment before use.
Official Patches & Advisories
All References (4)
→
https://curl.se/docs/CVE-2026-3784.htmlPatch · Vendor Advisory
→
https://curl.se/docs/CVE-2026-3784.jsonVendor Advisory
→
https://hackerone.com/reports/3584903Exploit · Issue Tracking · Third Party Advisory
→
http://www.openwall.com/lists/oss-security/2026/03/11/3Mailing List · Third Party Advisory
Quick Facts
CVE IDCVE-2026-3784
CVSS Score6.5 / 10
SeverityMEDIUM
CISA KEVNo
EPSS (30d)0.03%
Affected1 vendor
PublishedMar 11, 2026
Recommended Actions
- →Apply vendor patches immediately
- →Monitor CVE-2026-3784 in threat intel feeds
- →Review IDS/IPS signatures for exploitation attempts
Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWATCH.COM. CVE data is provided under the NVD usage policy.