Description
A flaw in the libcurl SASL negotiation for LDAP authentication allows an incomplete handshake sequence to be misinterpreted as a successful cryptographic verification. An attacker executing a Man-in-the-Middle (MITM) attack can inject a premature or shortcut response that bypasses complete peer validation.
Affected products
haxx: curl
References4
- curl.se/docs/CVE-2026-13608.html PatchVendor Advisory
- curl.se/docs/CVE-2026-13608.json Vendor Advisory
- hackerone.com/reports/3822248 ExploitThird Party Advisory
- hackerone.com/reports/3822248 ExploitThird Party Advisory
Metrics
- CVSS 3.1
-
7.4
HIGH
Score source: CNA
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N - EPSS — exploit probability
- 0% percentile: 43 · as of 3 November 2026
- CWE
- CWE-923
Could this be exploited in your environment?
A patch closes the known hole. A penetration test shows what an attacker can still reach — with proof.