CVE-2026-13608

high

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.

References

https://hackerone.com/reports/3822248

https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-72164

https://curl.se/docs/CVE-2026-13608.json

https://curl.se/docs/CVE-2026-13608.html

Details

Source: Mitre, NVD

Published: 2026-09-06

Updated: 2026-09-15

Risk Information

CVSS v2

Base Score: 7.1

Vector: CVSS2#AV:N/AC:H/Au:N/C:C/I:C/A:N

Severity: High

CVSS v3

Base Score: 7.4

Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N

Severity: High

EPSS

EPSS: 0.00265