A vulnerability exists where a connection requiring TLS incorrectly reuses an
existing unencrypted connection from the same connection pool. If an initial
transfer is made in clear-text (via IMAP, SMTP, or POP3), a subsequent request
to that same host bypasses the TLS requirement and instead transmit data
unencrypted.
References
| Link | Resource |
|---|---|
| https://curl.se/docs/CVE-2026-4873.html | Patch Vendor Advisory |
| https://curl.se/docs/CVE-2026-4873.json | Vendor Advisory |
| https://hackerone.com/reports/3621851 | Exploit Issue Tracking Third Party Advisory |
| http://www.openwall.com/lists/oss-security/2026/04/29/7 | Mailing List Patch Third Party Advisory |
Configurations
History
14 May 2026, 13:45
| Type | Values Removed | Values Added |
|---|---|---|
| First Time |
Haxx
Haxx curl |
|
| CPE | cpe:2.3:a:haxx:curl:*:*:*:*:*:*:*:* | |
| CWE | CWE-295 | |
| References | () https://curl.se/docs/CVE-2026-4873.html - Patch, Vendor Advisory | |
| References | () https://curl.se/docs/CVE-2026-4873.json - Vendor Advisory | |
| References | () https://hackerone.com/reports/3621851 - Exploit, Issue Tracking, Third Party Advisory | |
| References | () http://www.openwall.com/lists/oss-security/2026/04/29/7 - Mailing List, Patch, Third Party Advisory |
13 May 2026, 20:16
| Type | Values Removed | Values Added |
|---|---|---|
| CVSS |
v2 : v3 : |
v2 : unknown
v3 : 5.9 |
| CWE | CWE-319 |
13 May 2026, 14:50
| Type | Values Removed | Values Added |
|---|---|---|
| New CVE |
Information
Published : 2026-05-13 13:01
Updated : 2026-05-14 13:45
NVD link : CVE-2026-4873
Mitre link : CVE-2026-4873
CVE.ORG link : CVE-2026-4873
JSON object : View
Products Affected
haxx
- curl