A flaw was found in 389 Directory Server. The ldap_utf8prev() function reads bytes before the start of a buffer without bounds checking, causing a heap buffer over-read in string filter parsing that may influence internal filter processing behavior.
CVE-2026-11787
MEDIUMNVD 6.35.0▼Trending — 4 sources updated this week
EchelonGraph scoreMEDIUM confidence
Score 5.0 from GitHub Security Advisory published 2026-06-09. NVD baseline CVSS 6.3; sources differ by 1.3.
Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
6.3
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
- Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS: 0%CVSS: 6.3Exploit: NoneExposed: 0
No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.
- CVSS v3
- 6.3
- EG Score
- 5.0(medium)
- EPSS
- 7.4%
- KEV
- Not listed
Published
June 9, 2026
Last Modified
June 30, 2026
Advisory Details (3)
Auto-updated Jun 15, 2026Patch available. Sources: redhat.
redhat
2485425 – (CVE-2026-11787) CVE-2026-11787 389-ds-base: 389-ds-base: heap buffer over-read in ldap_utf8prev() via str2simple filter parsing
https://bugzilla.redhat.com/show_bug.cgi?id=2485425Vendor Advisories for CVE-2026-11787(1)
These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.
Frequently asked(5)
What is CVE-2026-11787?
CVE-2026-11787 is a medium vulnerability published on June 9, 2026. A flaw was found in 389 Directory Server. The ldap_utf8prev() function reads bytes before the start of a buffer without bounds checking, causing a heap buffer over-read in string filter parsing that may influence internal filter processing behavior.
When was CVE-2026-11787 disclosed?
CVE-2026-11787 was first published in the National Vulnerability Database on June 9, 2026, with the most recent update on June 30, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-11787 actively exploited?
CVE-2026-11787 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 7.4% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-11787?
CVE-2026-11787 has a CVSS v3 base score of 6.3 (NVD). EchelonGraph synthesises NVD + CISA KEV + FIRST EPSS + GHSA into a combined EG score of 5.0.
How do I remediate CVE-2026-11787?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-11787, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.
Dependency Blast Radius
Explore the affected products and dependency analysis for CVE-2026-11787
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