Vulnerability in MongoDB libmongocrypt's automatic-encryption context setup (CVE-2026-81523)
Summary
Vulnerability in MongoDB libmongocrypt's automatic-encryption context setup (CVE-2026-81523). Risk of unauthorized operations or information disclosure.
Original description
The description as published by the source.
A missing input-validation issue in MongoDB libmongocrypt's automatic-encryption context setup allows a caller-supplied database identifier to be accepted without sanitization. The resulting impact is limited to incorrect schema selection, which may lead to limited disclosure or modification of information handled by the application.
Source: NIST National Vulnerability Database NVD
Auto-generated summary
Assembled by SecPulse from the source data (CVSS, CWE, affected versions) using templates — no AI involved. Check the original description and references below for exact details.
A vulnerability tracked as CVE-2026-81523 has been found in MongoDB libmongocrypt's automatic-encryption context setup.
Risk of unauthorized operations or information disclosure. CVSS score: 4.4/10.
What to do: apply the vendor's official patched release.
If unsure, ask your IT team or search "MongoDB libmongocrypt's automatic-encryption context setup CVE-2026-81523" on the vendor's site.
CVE-2026-81523 (MongoDB libmongocrypt's automatic-encryption context setup) — CWE-74 / CVSS v3 4.4
Attack vector: local / no user interaction
Plan: 1) Audit SBOM/dependencies, 2) Stage→prod upgrade, 3) Add WAF/proxy monitoring on affected endpoints, 4) Hunt IOCs in logs.
Refs: see the GHSA / vendor advisory / patched release linked on this page.
A vulnerability (CWE-74) exists in MongoDB libmongocrypt's automatic-encryption context setup.
Check the vendor advisory for the affected versions of MongoDB libmongocrypt's automatic-encryption context setup.
Severity: Medium (CVSS 4.4/10). Risk of unauthorized operations or information disclosure.
Update to the patched release per vendor advisory.
Until the patch is applied: disable the affected feature, apply WAF rules, or restrict access via network ACLs.
Search webserver/proxy logs for unusual request patterns matching this CVE's known IOCs. Audit SBOM/dependencies to find affected services.
Response actions
Concrete steps and command examples for SOC/SRE teams to execute in order
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1Identify exposure identify
Audit SBOM/dependencies for affected components.資産台帳・SBOM・依存マニフェストで MongoDB libmongocrypt's automatic-encryption context setup を使っているサービスとバージョンを洗い出す。
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2Post-deployment verification verify
Confirm patched version is live in productionパッチ適用後、ステージングで PoC または同等の悪用パターンを再現して脆弱性が閉じたことを確認。本番ではアクセスログ・WAF でアラート再発が無いか継続監視。
Fix status by distribution
Fixed packages published by each distribution for this CVE
- Debian DEBIAN-CVE-2026-81523 libmongocrypt
- Ubuntu UBUNTU-CVE-2026-81523 libmongocrypt
References
- advisory github.com
- advisory nvd.nist.gov
- web github.com
- web jira.mongodb.org