CVE-2026-5052 — Information Disclosure
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CVE-2026-5052 — Vault’s PKI engine’s ACME validation did not reject local targets when issuing http-01 and tls-alpn-01 challenges. This may lead to these requests being sent to local network targets, potentially leading to information disclosure. Fixed in Vault Community Edition 2.0.0 and Vault Ente
What This Means For You
- If your environment is affected by CWE-918, review your exposure and prioritize patching based on your environment. Monitor vendor advisories for CVE-2026-5052 updates and patches.
Related ATT&CK Techniques
🛡️ Detection Rules
4 rules · 6 SIEM formats4 auto-generated detection rules for this incident, mapped to MITRE ATT&CK. Available in Sigma, Splunk SPL, Sentinel KQL, Elastic Lucene, QRadar AQL, and Wazuh.
Web Application Exploitation Attempt — CVE-2026-5052
Want this in your SIEM's native format? Get Splunk SPL, Sentinel KQL, Elastic, QRadar AQL, or Wazuh — ready to paste.
4 Sigma rules mapped to the ATT&CK techniques from this breach — pick your SIEM and get a ready-to-paste query.
Get All SIEM Formats →Indicators of Compromise
| ID | Type | Indicator |
|---|---|---|
| CVE-2026-5052 | vulnerability | CVE-2026-5052 |
| CWE-918 | weakness | CWE-918 |
Written by SCW Vulnerability Desk
Source & Attribution
| Source Platform | NVD |
| Channel | National Vulnerability Database |
| Published | April 17, 2026 at 07:16 UTC |
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