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.

Metrics

No CVSS v4.0

Attack Vector Network

Attack Complexity High

Privileges Required None

Scope Unchanged

Confidentiality Impact High

Integrity Impact High

Availability Impact None

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

The EPSS score is 0.00265.

Exploitation poc

Automatable no

Technical Impact total

Affected Vendors & Products

Vendors Products
Curl Subscribe
Curl Subscribe

No data.

No data.

OpenCVE Enrichment is a feature of OpenCVE that uses AI to automatically link vendors and products to CVEs. Learn more on GitHub.

Vendors Products
Curl Subscribe
Curl Subscribe
Advisories

No advisories yet.

Fixes

Solution

No solution given by the vendor.

Workaround

No workaround given by the vendor.

References
Link Providers
https://curl.se/docs/CVE-2026-13608.html cve-icon cve-icon
https://curl.se/docs/CVE-2026-13608.json cve-icon cve-icon
https://hackerone.com/reports/3822248 cve-icon cve-icon cve-icon
History

Tue, 08 Sep 2026 19:00:00 +0000

Type Values Removed Values Added
Weaknesses CWE-287

Tue, 08 Sep 2026 16:30:00 +0000

Type Values Removed Values Added
Weaknesses CWE-923
Metrics cvssV3_1

{'score': 7.4, 'vector': 'CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N'}

ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'poc', 'Technical Impact': 'total'}, 'version': '2.0.3'}

Sun, 06 Sep 2026 20:15:00 +0000

Type Values Removed Values Added
First Time appeared Curl
Curl curl
Vendors & Products Curl
Curl curl

Sun, 06 Sep 2026 19:45:00 +0000

Type Values Removed Values Added
Weaknesses CWE-287

Sun, 06 Sep 2026 18:00:00 +0000

Type Values Removed Values Added
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.
Title OpenLDAP SASL authentication bypass
References

Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: curl

Published:

Updated: 2026-09-08T15:39:45.194Z

Reserved: 2026-06-29T08:57:44.945Z

Link: CVE-2026-13608

cve-icon Vulnrichment

Updated: 2026-09-08T15:39:40.949Z

cve-icon NVD

Status : Undergoing Analysis

Published: 2026-09-06T18:17:19.810

Modified: 2026-09-08T16:18:00.317

Link: CVE-2026-13608

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-09-08T18:45:05Z

Weaknesses