Medium severity6.3NVD Advisory· Published Aug 6, 2026· Updated Aug 12, 2026

CVE-2026-18998

Description

A vulnerability was determined in cosmicstack-labs mercury-agent up to 1.1.12. Impacted is the function SubAgent.run of the file src/core/sub-agent.ts of the component delegate_task Tool. Executing a manipulation can lead to improper authorization. It is possible to launch the attack remotely. The exploit has been publicly disclosed and may be utilized. The project was informed of the problem early through an issue report but has not responded yet.

AI Insight

LLM-synthesized narrative grounded in this CVE's description and references.

Affected products

Cosmicstack Labs/Mercury Agentllm-create
Range: <=1.1.12

Patches

Vulnerability mechanics

References

News mentions

No linked articles in our index yet.

Severity

MediumCVSS v3.1

6.3/ 10

CVSS v42.1

CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/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

Attack vector: Network
Complexity: Low
Privileges: Low
User interaction: None
Scope: Unchanged
Confidentiality: Low
Integrity: Low
Availability: Low

Vector

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L

Affected

Source repo: github.com/cosmicstack-labs/mercury-agent/

EPSS

Probability of exploitation in the next 30 days.

0.21%

VYPR risk score

Composite of severity, exploitation, and reach.

0.41medium

cvss	0.410
epss	0.000
exploit	0.000
kev	0.000
patch	0.000
ransomware	0.000

Weaknesses

CWE-266
Incorrect Privilege Assignment
CWE-285
Improper Authorization

CVE ID

CVE-2026-18998

Credits

C(
ChenMarry (VulDB User)
reporter
VC
VulDB CNA Team
coordinator