CVE-2026-103547

CRITICALPre-NVD 9.29.2—
EchelonGraph scoreMEDIUM confidence

This critical-severity CVE scores 9.2 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.4% (28th percentile of EPSS-scored CVEs). GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).

Triggered by: NVD CVSS baseline
Sources: epss, secondary
Trending — 4 sources updated this week
9.2EG
EchelonGraph verdictPlan mitigationSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0.4%CVSS: 9.2Exploit: None knownExposed services: Not assessed

An upstream fix is merged but not yet released — mitigate (WAF / firewall / segmentation) until the release ships, then apply it.

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 v3
9.2
EG Score
9.2CRITICALmedium confidence
EG Risk
42
EG Risk 42/100CISA SSVC

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity92% × 45%
Exploitation0% × 40%
Automatability0% × 15%
CISA SSVC: Track at low or medium mission impact; Track* at high (mission-essential systems).
Action: An upstream fix is merged but not yet in a tagged release. Restrict network exposure of the affected system or apply the vendor's mitigation within your standard update timelines until it ships, then apply the release.
EPSS PROB
0.4%
EPSS %ILE
28th
KEV
Not listed

CISA SSVCTrack at low or medium mission impact; Track* at high (mission-essential systems).

An upstream fix is merged but not yet in a tagged release. Restrict network exposure of the affected system or apply the vendor's mitigation within your standard update timelines until it ships, then apply the release.

Exploitation none (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact total (CISA Vulnrichment). Mission impact is CISA's Mission & Well-being decision point, and only you can judge it: high means the affected system is essential to your organisation's mission, or its compromise could cause irreversible harm to people. CISA's decision table

Published

September 30, 2026

Last Modified

October 1, 2026

Advisory Details (4)

Auto-updated Sep 30, 2026
Upstream fix merged — awaiting tagged release. Sources: github_commit.
generic

OpenBSD 7.8 Errata

https://www.openbsd.org/errata78.html
generic
https://ftp.openbsd.org/pub/OpenBSD/patches/7.9/common/021_ldapd.patch.sig
github_commit

commit 4f3f58e83c2a (openbsd/src)

Fix landed in openbsd/src commit 4f3f58e83c2a — awaiting tagged release

https://github.com/openbsd/src/commit/4f3f58e83c2a6d239c544236a9d4d76c74bbf960
generic

OpenBSD 7.9 Errata

https://www.openbsd.org/errata79.html

Vendor Advisories for CVE-2026-103547(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 31× in last 7d / 31× 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. 2026-10-04 12:03 UTCGHSA enrichment
  2. 2026-10-04 08:04 UTCGHSA enrichment
  3. 2026-10-04 04:03 UTCGHSA enrichment
  4. 2026-10-04 00:04 UTCGHSA enrichment
  5. 2026-10-03 20:02 UTCGHSA enrichment
  6. 2026-10-03 16:02 UTCEG score recompute
  7. 2026-10-03 16:02 UTCGHSA enrichment
  8. 2026-10-03 14:25 UTCEPSS rescore
  9. 2026-10-03 12:03 UTCGHSA enrichment
  10. 2026-10-03 08:03 UTCGHSA enrichment
  11. 2026-10-03 04:03 UTCGHSA enrichment
  12. 2026-10-03 00:04 UTCGHSA enrichment
  13. 2026-10-02 20:04 UTCEG score recompute
  14. 2026-10-02 20:04 UTCGHSA enrichment
  15. 2026-10-02 16:02 UTCGHSA enrichment
  16. 2026-10-02 12:01 UTCGHSA enrichment
  17. 2026-10-02 08:00 UTCGHSA enrichment
  18. 2026-10-02 04:01 UTCGHSA enrichment
  19. 2026-10-02 00:01 UTCEG score recompute
  20. 2026-10-02 00:01 UTCGHSA enrichment
  21. 2026-10-01 19:49 UTCEPSS rescore
  22. 2026-10-01 19:13 UTCGHSA enrichment
  23. 2026-10-01 15:13 UTCGHSA enrichment
  24. 2026-10-01 12:24 UTCGHSA enrichment
  25. 2026-10-01 08:23 UTCGHSA enrichment
Show 6 more
  1. 2026-10-01 04:23 UTCGHSA enrichment
  2. 2026-10-01 00:24 UTCGHSA enrichment
  3. 2026-09-30 20:22 UTCEG score recompute
  4. 2026-09-30 20:06 UTCEG score recompute
  5. 2026-09-30 19:46 UTCEG score recompute
  6. 2026-09-30 19:45 UTCMITRE cvelistV5first tracked

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Frequently asked(5)

What is CVE-2026-103547?
CVE-2026-103547 is a critical vulnerability published on September 30, 2026. 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…
When was CVE-2026-103547 disclosed?
CVE-2026-103547 was first published on September 30, 2026, with the most recent update on October 1, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-103547 actively exploited?
CVE-2026-103547 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.4% probability of exploitation in the next 30 days (28th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-103547?
CVE-2026-103547 has a CVSS base score of 9.2 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-103547?
An upstream fix for CVE-2026-103547 has been merged but is not yet in a tagged release. Until it ships, restrict network exposure of the affected system or apply the vendor's mitigation, then update to the release that contains the fix. The vendor advisories EchelonGraph has for CVE-2026-103547 are linked in the Vendor Advisories panel on this page.

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