CVE-2026-13608

7.4 highEPSS 0.5%

High (7.4) in haxx curl. EPSS 0.5% chance of exploitation in the next 30 days.

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.

Severity

CVSS 3.1

7.4 high

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

EPSS: 0.5% chance of exploitation in the next 30 days; higher than 42% of CVEs (scores of 2026-10-31)
CWE: CWE-923
Published: 2026-09-06
Modified: 2026-09-15
Record from: the NVD, synced 2026-10-19

Affected

haxx:curl

References

https://curl.se/docs/CVE-2026-13608.html
https://curl.se/docs/CVE-2026-13608.json
https://hackerone.com/reports/3822248
https://hackerone.com/reports/3822248

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