CVE-2026-87806

HIGHPre-NVD 7.47.4—
EchelonGraph scoreHIGH confidence

Score 7.4 from GitHub Security Advisory (severity: CRITICAL) published 2026-09-09. a secondary CVSS source baseline 7.4; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 3 sources updated this week
7.4EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 1%CVSS: 7.4Exploit: None knownExposed: 0

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

Parse Server versions <= 8.6.87 and >= 9.0.0 < 9.10.1-alpha.7 contain an authentication bypass in the built-in LDAP authentication adapter. The adapter forwarded the client-supplied password to the directory without verifying that a password had been supplied, and treated any non-error response from the directory as proof of authentication. A zero-length credential turns an LDAP simple bind into the unauthenticated authentication mechanism described in RFC 4513 section 5.1.2, which some directories (including Active Directory in its default configuration) answer with success while mapping the connection to anonymous. As a result, an unauthenticated attacker who knows a directory username can obtain a valid session token for that account, resulting in account takeover. Only deployments that enable the LDAP authentication adapter are affected, and deployments whose directory refuses unauthenticated simple bind (such as a stock OpenLDAP configuration) are not exploitable. The issue is fixed in 8.6.88 and 9.10.1-alpha.7, which require the password to be a non-empty string and reject the request before contacting the directory.

CVSS v3
7.4
EG Score
7.4(high)
EG Risk
34(Track)
EG Risk 34/100SSVC: Track

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
Severity74% × 45%
Exploitation1% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
1%
EPSS %ILE
41%
KEV
Not listed

Published

September 9, 2026

Last Modified

September 10, 2026

Advisory Details (2)

Auto-updated Sep 9, 2026
Patch available. Sources: github.
generic

Parse Server 9.0.0 Authentication Bypass via LDAP Empty Password | Advisories | VulnCheck

https://www.vulncheck.com/advisories/parse-server-9.0.0-authentication-bypass-via-ldap-empty-password
github Patch Available

Account takeover via empty password in LDAP auth adapter · Advisory · parse-community/parse-server · GitHub

https://github.com/parse-community/parse-server/security/advisories/GHSA-863r-39r9-vfcf

Vendor Advisories for CVE-2026-87806(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 26× in last 7d / 62× 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. 2026-09-25 00:26 UTCEG score recompute
  2. 2026-09-25 00:26 UTCGHSA enrichment
  3. 2026-09-24 14:04 UTCEPSS rescore
  4. 2026-09-24 12:17 UTCGHSA enrichment
  5. 2026-09-24 00:07 UTCEG score recompute
  6. 2026-09-24 00:07 UTCGHSA enrichment
  7. 2026-09-23 17:54 UTCEPSS rescore
  8. 2026-09-23 11:59 UTCGHSA enrichment
  9. 2026-09-22 23:50 UTCEG score recompute
  10. 2026-09-22 23:50 UTCGHSA enrichment
  11. 2026-09-22 16:01 UTCEPSS rescore
  12. 2026-09-22 11:41 UTCGHSA enrichment
  13. 2026-09-21 23:33 UTCEG score recompute
  14. 2026-09-21 23:32 UTCGHSA enrichment
  15. 2026-09-21 21:09 UTCEPSS rescore
  16. 2026-09-21 11:22 UTCGHSA enrichment
  17. 2026-09-20 23:13 UTCEG score recompute
  18. 2026-09-20 23:13 UTCGHSA enrichment
  19. 2026-09-20 20:16 UTCEPSS rescore
  20. 2026-09-20 11:01 UTCGHSA enrichment
  21. 2026-09-19 22:52 UTCEG score recompute
  22. 2026-09-19 22:52 UTCGHSA enrichment
  23. 2026-09-19 10:44 UTCGHSA enrichment
  24. 2026-09-18 22:27 UTCEG score recompute
  25. 2026-09-18 22:27 UTCGHSA enrichment
Show 37 more
  1. 2026-09-18 19:28 UTCEPSS rescore
  2. 2026-09-18 10:19 UTCGHSA enrichment
  3. 2026-09-17 22:10 UTCEG score recompute
  4. 2026-09-17 22:10 UTCGHSA enrichment
  5. 2026-09-17 19:32 UTCEPSS rescore
  6. 2026-09-17 10:01 UTCGHSA enrichment
  7. 2026-09-16 21:52 UTCEG score recompute
  8. 2026-09-16 21:52 UTCGHSA enrichment
  9. 2026-09-16 14:09 UTCEPSS rescore
  10. 2026-09-16 09:43 UTCEG score recompute
  11. 2026-09-16 09:43 UTCGHSA enrichment
  12. 2026-09-16 05:15 UTCEPSS rescore
  13. 2026-09-15 21:34 UTCGHSA enrichment
  14. 2026-09-15 09:24 UTCEG score recompute
  15. 2026-09-15 09:24 UTCGHSA enrichment
  16. 2026-09-15 03:12 UTCEPSS rescore
  17. 2026-09-14 21:15 UTCGHSA enrichment
  18. 2026-09-14 09:06 UTCGHSA enrichment
  19. 2026-09-13 20:58 UTCEG score recompute
  20. 2026-09-13 20:58 UTCGHSA enrichment
  21. 2026-09-13 08:49 UTCGHSA enrichment
  22. 2026-09-12 20:40 UTCEG score recompute
  23. 2026-09-12 20:40 UTCGHSA enrichment
  24. 2026-09-12 08:31 UTCGHSA enrichment
  25. 2026-09-11 20:22 UTCEG score recompute
  26. 2026-09-11 20:22 UTCGHSA enrichment
  27. 2026-09-11 14:53 UTCEPSS rescore
  28. 2026-09-11 14:53 UTCEPSS rescore
  29. 2026-09-11 08:13 UTCGHSA enrichment
  30. 2026-09-10 20:03 UTCGHSA enrichment
  31. 2026-09-10 13:51 UTCGHSA enrichment
  32. 2026-09-10 01:43 UTCGHSA enrichment
  33. 2026-09-09 13:33 UTCEG score recompute
  34. 2026-09-09 13:32 UTCGHSA enrichment
  35. 2026-09-09 12:25 UTCEG score recompute
  36. 2026-09-09 11:30 UTCEG score recompute
  37. 2026-09-09 11:29 UTCMITRE cvelistV5first tracked

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-87806?
CVE-2026-87806 is a high vulnerability published on September 9, 2026. Parse Server versions <= 8.6.87 and >= 9.0.0 < 9.10.1-alpha.7 contain an authentication bypass in the built-in LDAP authentication adapter. The adapter forwarded the client-supplied password to the directory without verifying that a password had been supplied, and treated any non-error response…
When was CVE-2026-87806 disclosed?
CVE-2026-87806 was first published in the National Vulnerability Database on September 9, 2026, with the most recent update on September 10, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-87806 actively exploited?
CVE-2026-87806 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 1% probability of exploitation in the next 30 days, which ranks it in the top 59.0% of all scored CVEs.
What is the CVSS score of CVE-2026-87806?
CVE-2026-87806 has a CVSS v3 base score of 7.4 (NVD).
How do I remediate CVE-2026-87806?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-87806, 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.

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