CVE-2026-16560

MEDIUMPre-NVD 5.35.3—
EchelonGraph scoreHIGH confidence

Score 5.3 from GitHub Security Advisory published 2026-07-22. a secondary CVSS source baseline 5.3; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: ghsa, secondary
Trending — 3 sources updated this week
5.3
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS: —CVSS: 5.3Exploit: NoneExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

A heap-buffer-overflow flaw was found in Directory Server (389-ds-base). When a DN contains a legacy-quoted value, the server won't close the heap allocation allowing another call to refer to the same memory pointer causing a denial of service or an arbitrary memory write operation.

CVSS v3
5.3
EG Score
5.3(high)
EPSS
—
KEV
Not listed

Published

July 22, 2026

Last Modified

July 22, 2026

Advisory Details (2)

Auto-updated Jul 22, 2026
Patch available. Sources: redhat.
redhat

2506102 – (CVE-2026-16560) CVE-2026-16560 389-ds-base: 389-ds-base: heap-buffer-overflow in rdn_av_swap on quoted multivalued RDN

https://bugzilla.redhat.com/show_bug.cgi?id=2506102
redhat Patch Available

cve-details

https://access.redhat.com/security/cve/CVE-2026-16560

Vendor Advisories for CVE-2026-16560(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 9× in last 7d / 9× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

  1. 2026-07-22 22:05 UTCEG score recompute
  2. 2026-07-22 22:04 UTCGHSA enrichment
  3. 2026-07-22 18:40 UTCEG score recompute
  4. 2026-07-22 18:39 UTCGHSA enrichment
  5. 2026-07-22 17:16 UTCEG score recompute
  6. 2026-07-22 17:15 UTCGHSA enrichment
  7. 2026-07-22 14:58 UTCEG score recompute
  8. 2026-07-22 13:19 UTCEG score recompute
  9. 2026-07-22 13:17 UTCMITRE cvelistV5first tracked

Frequently asked(4)

What is CVE-2026-16560?
CVE-2026-16560 is a medium vulnerability published on July 22, 2026. A heap-buffer-overflow flaw was found in Directory Server (389-ds-base). When a DN contains a legacy-quoted value, the server won't close the heap allocation allowing another call to refer to the same memory pointer causing a denial of service or an arbitrary memory write operation.
When was CVE-2026-16560 disclosed?
CVE-2026-16560 was first published in the National Vulnerability Database on July 22, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
What is the CVSS score of CVE-2026-16560?
CVE-2026-16560 has a CVSS v3 base score of 5.3 (NVD).
How do I remediate CVE-2026-16560?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-16560, 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-2026-16560

Explore →

Is Your Infrastructure Affected by CVE-2026-16560?

EchelonGraph automatically scans your cloud infrastructure and maps CVE exposure using blast radius analysis.

Start Free Scan →Browse All CVEs