CVE WatchSep 4, 2026

CVE-2026-53603

nebula-mesh is a self-hosted control plane for Slack Nebula mesh VPN. Prior to version 0.3.8, Operator session tokens are stored in plaintex

CVSS

—

No CVSS

EPSS

—

KEV

—

Exploit Today

—

0-100

Published: Sep 4, 2026 · Last modified: Sep 4, 2026 · CWE-312 · CWE-522

EPSS · 30d

Not enough EPSS history yet.

Technical description

nebula-mesh is a self-hosted control plane for Slack Nebula mesh VPN. Prior to version 0.3.8, Operator session tokens are stored in plaintext in the operator_sessions table (the token column is the PRIMARY KEY). The session token is a 32-byte random hex value sent directly in a cookie and valid for 24 hours. Anyone who can read the database (backup, snapshot, file copy, or SQL-level disclosure) obtains every active session token and can hijack operator sessions directly, with no further authentication. This issue has been patched in version 0.3.8.

Official references

Related CVEs

CVECVSSEPSSKEVRExploitTitleMod.

CVE-2026-857006.5 MED

—

———Onyx 4.6.6 fails to properly restrict access to custom tool credentials stored in custom_headers, allowing any authenticated user to read admin-defined API keys. Attackers with basic authentication can call GET /tool/{tool_id} or GET /tool endpoints to retrieve plaintext authorization headers and third-party API credentials, then use them to directly access upstream APIs.21h CVE-2026-88627.5 HIG

—

——0IBM Netezza Software 11.3.0.3 through Interim Fix 002 has credentials that are hardcoded in the application source code, allowing unauthorized access to the container registry. The exposed secret enables attackers to pull private container images, potentially revealing proprietary code, configuration details, and other sensitive information.17h CVE-2026-751366.1 MED

1.4%

——0UpSignOn for Windows before 7.19.0 contains an insecure credential storage vulnerability that allows local attackers to retrieve the biometric unlock key stored in the Windows PasswordVault API without triggering any authentication prompt. Attackers can access the stored biometric key from a standard local process within the same Windows session to decrypt the protected vault files and export the entire password manager contents in cleartext.2d CVE-2026-737482.2 LOW

1.3%

——0A vulnerability in the affected interface of HPE Networking Fabric Composer allows an attacker with administrative privileges to access sensitive information in a cleartext format. A successful exploit allows an attacker to retrieve information which could be used to potentially gain further access to network services supported by HPE Networking Fabric Composer.3d CVE-2026-835517.2 HIG

30.9%

——9Cleartext storage of sensitive information in the @step and @remote decorator pipeline component in Amazon SageMaker Python SDK before v3.11.0 and v2.256.0 might allow an authenticated remote user to extract the HMAC signing key from SageMaker DescribePipeline API responses and forge valid integrity signatures for specially crafted function payloads, achieving code execution in another user's pipeline execution context within the same AWS account.2d CVE-2026-779756.5 MED

7.8%

——2The affected Ebyte product exports administrative credentials and other sensitive configuration information without adequate protection. An unauthenticated attacker on the adjacent network who can obtain an exported configuration file could recover valid credentials and use them to access the device or similarly configured systems.4d