Reference page — cumulative record through Monday, October 19, 2026 UTC. Reference pages update as the archive grows; only dated daily editions are immutable pages of record.

CVE-2019-19906

CVE-2019-19906HIGH

n/a n/a — cyrus-sasl (aka Cyrus SASL) 2.1.27 has an out-of-bounds write leading to unauthenticated remote denial-of-service in OpenLDAP via a malfo…

  AV  AC  PR  UI  S  C  I  A   CVSS    EPSS   %ile   KEV
   N   L   N   N  U  N  N  H    7.5   .0804   94.7     —

AFFECTED
  Product  Versions  Fixed
  n/a      n/a –     —

TIMELINE
  Dec 19  Reserved by mitre
  Dec 19  Published (CNA: mitre)
  Oct 14  ENRICHED — CVE-2019-19906. Received CVSS 7.5 and CPE data from NVD.
  Oct 14  EXPLOIT PUBLISHED — CVE-2019-19906. Public exploit reference added.

CWE-193, CWE-787 · CNA: mitre · CVSS v3.1 · 16 references · NVD status: Modified

Description

cyrus-sasl (aka Cyrus SASL) 2.1.27 has an out-of-bounds write leading to unauthenticated remote denial-of-service in OpenLDAP via a malformed LDAP packet. The OpenLDAP crash is ultimately caused by an off-by-one error in _sasl_add_string in common.c in cyrus-sasl.

Lifecycle

Complete event history — 4 events, chronological
Date	Event	Detail
December 19, 2019	Reserved	Reserved by mitre
December 19, 2019	Published	Published (CNA: mitre)
October 14, 2026	ENRICHED	ENRICHED — CVE-2019-19906. Received CVSS 7.5 and CPE data from NVD.
October 14, 2026	EXPLOIT PUBLISHED	EXPLOIT PUBLISHED — CVE-2019-19906. Public exploit reference added.

Affected

Affected products and packages — 1 row
Vendor	Product / Package	Ecosystem	Version introduced	Fixed
n/a	n/a	—	n/a	—

Weaknesses

CWE-193 · CWE-787

References (16)

http://seclists.org/fulldisclosure/2020/Jul/23 [Mailing List, Third Party Advisory]
http://seclists.org/fulldisclosure/2020/Jul/24 [Mailing List, Third Party Advisory]
http://www.openwall.com/lists/oss-security/2022/02/23/4 [Mailing List, Patch, Release Notes, Third Party Advisory]
https://cert-portal.siemens.com/productcert/html/ssa-398330.html
https://github.com/cyrusimap/cyrus-sasl/issues/587 [Patch, Third Party Advisory]
https://lists.apache.org/thread.html/r58af02e294bd07f487e2c64ffc0a29b837db5600e33b6e698b9d696b%40%3Cissues.bookkeeper.apache.org%3E
https://lists.apache.org/thread.html/rf4c02775860db415b4955778a131c2795223f61cb8c6a450893651e4%40%3Cissues.bookkeeper.apache.org%3E
https://lists.debian.org/debian-lts-announce/2019/12/msg00027.html [Mailing List, Third Party Advisory]
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/MW6GZCLECGL2PBNHVNPJIX4RPVRVFR7R/
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/OB4GSVOJ6ESHQNT5GSV63OX5D4KPSTGT/
https://seclists.org/bugtraq/2019/Dec/42 [Mailing List, Third Party Advisory]
https://support.apple.com/kb/HT211288 [Third Party Advisory]
https://support.apple.com/kb/HT211289 [Third Party Advisory]
https://usn.ubuntu.com/4256-1/ [Patch, Third Party Advisory]
https://www.debian.org/security/2019/dsa-4591 [Third Party Advisory]
https://www.openldap.org/its/index.cgi/Incoming?id=9123 [Exploit, Third Party Advisory]

Authoritative record: CVE-2019-19906 at cve.org

Weaknesses: CWE-193 · CWE-787

About this page

This is a reference page, not a dated page of record. It assembles the complete lifecycle of CVE-2019-19906 from the CVE Program record, NVD enrichment, the CISA KEV catalog, EPSS, and OSV advisories. The box score's numbers (CVSS, EPSS, KEV status) are current as of Monday, October 19, 2026 UTC and are re-derived as the archive grows; only dated daily editions are immutable pages of record. The authoritative source for this identifier is cve.org.