CVE-2026-39962

CRITICALNVD 9.69.6—
EchelonGraph scoreMEDIUM confidence

This critical-severity CVE scores 9.6 under NVD CVSS v3. EPSS exploit probability: 0.3%, top 73% of all CVEs by exploit prediction. 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, nvd
Trending — 3 sources updated this week
9.6
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 0%CVSS: 9.6Exploit: NoneExposed: 0

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

MISP is an open source threat intelligence and sharing platform. Prior to 2.5.36, improper neutralization of special elements in an LDAP query in ApacheAuthenticate.php allows LDAP injection via an unsanitized username value when ApacheAuthenticate.apacheEnv is configured to use a user-controlled server variable instead of REMOTE_USER (such as in certain proxy setups). An attacker able to control that value can manipulate the LDAP search filter and potentially bypass authentication constraints or cause unauthorized LDAP queries. This vulnerability is fixed in 2.5.36.

CVSS v3
9.6
EG Score
9.6(medium)
EG Risk
43(Track)
EG Risk 43/100SSVC: 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
Severity96% × 45%
Exploitation0% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS
26.9%
KEV
Not listed

Published

April 9, 2026

Last Modified

June 22, 2026

Advisory Details (4)

Auto-updated May 1, 2026
Patch available. Sources: github.
github Patch Available

LDAP injection in MISP ApacheAuthenticate when using a user-controlled Apache environment variable · Advisory · MISP/MISP · GitHub

https://github.com/MISP/MISP/security/advisories/GHSA-mc53-48w8-9g63
generic

Release MISP 2.5.36: Easter bunny release · MISP/MISP · GitHub

https://github.com/MISP/MISP/releases/tag/v2.5.36
generic

fix: [security] LDAP injection via unsanitized username in LDAP searc… · MISP/MISP@d7d671e · GitHub

https://github.com/MISP/MISP/commit/d7d671ea8f5822e91207dcad2003c35c30092a32
generic

fix: sanitize user input before sending it to ldap · MISP/MISP@380ee41 · GitHub

https://github.com/MISP/MISP/commit/380ee4136a7d9ce2fe63fce06d517839f30aba10

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 9× in last 7d / 36× 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. 2026-07-23 03:10 UTCEG score recompute
  2. 2026-07-22 14:08 UTCEPSS rescore
  3. 2026-07-21 15:24 UTCEPSS rescore
  4. 2026-07-20 20:32 UTCOSV refresh
  5. 2026-07-20 17:08 UTCEPSS rescore
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  1. 2026-07-04 06:31 UTCEPSS rescore
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  44. 2026-06-01 13:52 UTCEPSS rescore
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  65. 2026-05-20 18:05 UTCEG score recompute
  66. 2026-05-20 11:22 UTCEPSS rescore
  67. 2026-05-20 11:22 UTCEPSS rescore

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Frequently asked(5)

What is CVE-2026-39962?
CVE-2026-39962 is a critical vulnerability published on April 9, 2026. MISP is an open source threat intelligence and sharing platform. Prior to 2.5.36, improper neutralization of special elements in an LDAP query in ApacheAuthenticate.php allows LDAP injection via an unsanitized username value when ApacheAuthenticate.apacheEnv is configured to use a user-controlled…
When was CVE-2026-39962 disclosed?
CVE-2026-39962 was first published in the National Vulnerability Database on April 9, 2026, with the most recent update on June 22, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-39962 actively exploited?
CVE-2026-39962 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 26.9% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-39962?
CVE-2026-39962 has a CVSS v3 base score of 9.6 (NVD).
How do I remediate CVE-2026-39962?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-39962, 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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