CVE-2026-16763

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

1.22% probability of exploitation activity in the next 30 days.

EPSS percentile

Ranks above 66.5% 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: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

NVD analysis status

Deferred. NVD last modified this record on 2026-07-24.

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

2026-07-23 21:15Z1 MO AGO

Last updated

2026-07-24 13:39Z1 MO AGO

Reserved

2026-07-23

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:L/VA:L/SC:N/SI:N/SA:N/E:P

Weaknesses

• CWE-77Improper Neutralization of Special Elements used in a Command ('Command Injection')Class
• CWE-78Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')Base

Data version

5.2

Document digest

b166c95144683539d0fe5bf04f4cb18df01304617d7677f4fc606434c59ed7f1

• vuldb.comVDB-382620 | localstack serverless-localstack Configuration index.js os command injectionhttps://vuldb.com/vuln/382620vdb-entrytechnical-description
• vuldb.comVDB-382620 | CTI Indicators (IOB, IOC, TTP, IOA)https://vuldb.com/vuln/382620/ctisignaturepermissions-required
• vuldb.comCVE-2026-16763 | CVE Analysis and Reporthttps://vuldb.com/cve/CVE-2026-16763third-party-advisory
• vuldb.comSubmit #861028 | Node.js serverless-localstack 1.4.0 OS Command Injectionhttps://vuldb.com/submit/861028third-party-advisory
• github.comhttps://github.com/localstack/serverless-localstack/issues/303exploitissue-tracking
• github.comhttps://github.com/localstack/serverless-localstack/product