CVE-2026-103547In ldapd in OpenBSD 7.8 before errata 057 and 7.9 before errata 021, delegated BSD authentication results are correlated only by the LDAP child process client file descriptor and LDAP message ID.
Updated under an hour ago ()
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EPSS puts the chance of exploitation in the next 30 days at 0.37%, higher than 29% of scored CVEs.
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In ldapd in OpenBSD 7.8 before errata 057 and 7.9 before errata 021, delegated BSD authentication results are correlated only by the LDAP child process client file descriptor and LDAP message ID. After a connection closes, a later connection that reuses the same file descriptor and message ID can receive the earlier authentication result. A remote attacker who can reach ldapd can complete a Bind as another identity. A missing connection can also cause a NULL pointer dereference. (ldapd is not enabled by default.)
- CVSS
- 9.2 CRITICAL (v4.0, CNA)CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:H/VI:H/VA:L/SC:N/SI:N/SA:N
- Weakness (CWE)
- CWE-863
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- 0.37% (percentile 29)
- Assigned by
- mitre
- NVD analysis
- Deferred
- Record last updated
- Sep 30, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
OpenBSD OpenBSD openbsd:openbsd (from the name) | from 7.8 before errata 057; from 7.9 before errata 021 | CNA record |
References
- https://www.openbsd.org/errata79.html
- https://github.com/openbsd/src/commit/4f3f58e83c2a6d239c544236a9d4d76c74bbf960
- https://ftp.openbsd.org/pub/OpenBSD/patches/7.9/common/021_ldapd.patch.sig
- https://www.openbsd.org/errata78.html
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.