MEDIUM
CVE-2026-6429
Published: May 13, 2026· Updated: May 14, 2026
5.3
CVSS v3.1
EPSS:0.03%probability of exploitation in 30 daysPercentile:8.4th
Official Description
When asked to both use a `.netrc` file for credentials and to follow HTTP
redirects, libcurl could leak the password used for the first host to the
followed-to host under certain circumstances.
Technical Analysis
CVE-2026-6429 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.
Exploitation requires low privileges, which limits the exposure to scenarios where an attacker has already gained initial access.
A successful exploit results in complete confidentiality breach (data exposure), with a CVSS base score of 5.3.
CVSS v3.1 Vector Breakdown
Exploitability
Attack VectorNetwork
Attack ComplexityHigh
Privileges Req.Low
User InteractionNone
ScopeUnchanged
Impact
ConfidentialityHigh
IntegrityNone
AvailabilityNone
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:N/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 (3)
→
https://curl.se/docs/CVE-2026-6429.htmlPatch · Vendor Advisory
→
https://hackerone.com/reports/3677759Exploit · Issue Tracking · Third Party Advisory
Quick Facts
CVE IDCVE-2026-6429
CVSS Score5.3 / 10
SeverityMEDIUM
CISA KEVNo
EPSS (30d)0.03%
Affected1 vendor
PublishedMay 13, 2026
Recommended Actions
- →Apply vendor patches immediately
- →Monitor CVE-2026-6429 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.