CVEvulnerability
CVE-2026-4873
5.9 MEDIUM
Official page ↗
- Status
- Modified
- Published
- 2026-05-13
- Last modified
- 2026-09-15
- Assigner
- 2499f714-1537-4658-8207-48ae4bb9eae9
- CVSS 3.1 (134c704f-9b21-4f2e-91b3-4a467353bcc0)
- 5.9 MEDIUM — CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N
- Weaknesses
- CWE-295, CWE-319
Description
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.
Affected configurations
• haxx curl (>= 7.20.0 < 8.20.0)
Related
References
- 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