CVE-2026-90811

Exploitation

Public exploit code exists. CISA's assessment records a public proof of concept. That is not a report of exploitation in the wild.

SSVC decision

• ExploitationpocPublic proof-of-concept exploit code exists. Not a report of exploitation in the wild.
• AutomatablenoAt least one step from reconnaissance to exploitation cannot be reliably automated.
• Technical ImpactpartialSuccessful exploitation gives limited control of the vulnerable component.

CISA publishes the decision points, not a final SSVC decision. The decision also depends on mission and well-being impact, which is a property of your deployment rather than of the vulnerability.

EPSS probability

0.14% probability of exploitation activity in the next 30 days.

EPSS percentile

Equal to or higher than the score of 4.0% of scored records. A rank, not a probability.

NVD base score

1.9 (CVSS v4.0), scored by the NVD independently of the CNA.

NVD CVSS vector

CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

NVD analysis status

Deferred. NVD last modified this record on 2026-09-14.

Red Hat severity

No Red Hat rating. Red Hat rates the CVEs that affect its products.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

Published

2026-09-14 18:45Z1 MO AGO

Last updated

2026-09-14 19:00Z1 MO AGO

Reserved

2026-09-13

Assigning CNA

VulDB

Record state

PUBLISHED

Severity

Medium (CVSS 4.8)

CNA CVSS vector

CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:P

Weaknesses

• CWE-200Exposure of Sensitive Information to an Unauthorized ActorClass
• CWE-284Improper Access ControlPillar

Data version

5.2

Document digest

b74b7e2ddad6128500da9737e62bc8a7accefdfb0214940b5a7e9afdcfd049f2

• vuldb.comVDB-403313 | cosmicstack-labs mercury-agent Shell Permission Manifest permissions.ts PermissionManager.checkShellCommand information disclosurehttps://vuldb.com/vuln/403313vdb-entrytechnical-description
• vuldb.comVDB-403313 | CTI Indicators (IOB, IOC, TTP, IOA)https://vuldb.com/vuln/403313/ctisignaturepermissions-required
• vuldb.comCVE-2026-90811 | CVE Analysis and Reporthttps://vuldb.com/cve/CVE-2026-90811third-party-advisory
• vuldb.comSubmit #922877 | cosmicstack-labs mercury-agent <= 1.2.0 Exposure of Sensitive Information to an Unauthorized Actor (CWE-200)https://vuldb.com/submit/922877third-party-advisory
• github.comhttps://github.com/cosmicstack-labs/mercury-agent/issues/102exploitissue-tracking
• github.comhttps://github.com/cosmicstack-labs/mercury-agent/product