Low [CVE-2026-13608] Authentication bypass in OpenLDAP SASL negotiation via Man-in-the-Middle (MITM) attack
This low-severity Red Hat Linux advisory covers CVE-2026-13608 affecting Red Hat Hardened Images, Red Hat Enterprise Linux 10, Red Hat Satellite 6.
Aggregated and source-linked by VulniPulse. Data sources, validation and limitations.
VulniPulse record published Record updated
Android app · Google Play
Monitor future Red Hat Linux CVEs from your phone.
Choose a whole vendor or a precise platform, then receive matching security advisories by phone notification, email, or both. Coverage follows 32 official vendor sources and 160+ reviewed platform categories.
Summary
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.
A flaw was found in libcurl's SASL (Simple Authentication and Security Layer) negotiation for LDAP (Lightweight Directory Access Protocol) authentication when using the OpenLDAP backend. This Low impact flaw in libcurl's SASL negotiation for LDAP authentication could allow an attacker to bypass peer validation through a Man-in-the-Middle (MITM) attack.
Exploitation requires an active network attacker to inject a premature response during the authentication handshake. Red Hat severity: Low — CVSS 3.7 (CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N).
Weakness: CWE-923. Affected Red Hat products: Red Hat Hardened Images; Red Hat Enterprise Linux 10; Red Hat Satellite 6.
Red Hat fixing advisory: RHSA-2026:63161, RHSA-2026:63514.
Affected products named by the advisory: Red Hat package: curl.
Affected versions
No affected-version range was extracted from the source record. The vendor advisory is authoritative — check it before change work.
Official advisory · high-confidence parse· fetched 8 days ago·verify at source
- curl-main-8.22.0-0.1.hum1
- rust-main-1.98.0-1.hum1
- RHSA-2026:63161
- RHSA-2026:63514
Official advisory · high-confidence parse· fetched 8 days ago·verify at source
Mitigation checklist
- To mitigate enforce strict mutual authentication and cryptographic verification of both endpoints before transmitting sensitive data. Implement robust TLS/SSL configurations with explicit certificate pinning or strict CA validation to prevent Man-in-the-Middle (MITM) attackers from intercepting, prematurely concluding, or manipulating the handshake.
Official advisory · high-confidence parse· fetched 8 days ago·verify at source
Discussion(0)
No comments yet. Share field notes, upgrade gotchas, or questions — verify against the vendor advisory before acting on community advice.
Sign in to join the discussion.