CVE-2026-2731 PUBLISHED

Unauthenticated RCE in Dynamicweb 9 and Dynamicweb 8

Assigner: NCSC-FI
Reserved: 19.02.2026 Published: 19.02.2026 Updated: 19.02.2026

Path traversal and content injection in JobRunnerBackground.aspx in DynamicWeb 8 (all) and 9 (<9.19.7 and <9.20.3) allows unauthenticated attackers to execute code via simple web requests

Metrics

CVSS 4.0

CVSS Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H
CVSS Score: 10

Exploitability Metrics		Vulnerable System Impact Metrics		Subsequent System Impact Metrics
Attack Vector	Network	Confidentiality	High	Confidentiality	High
Attack Complexity	Low	Integrity	High	Integrity	High
Attack Requirements	None	Availability	High	Availability	High
Privileges Required	None
User Interaction	None

CVSS 4.0

Product Status

Vendor	DynamicWeb
Product	DynamicWeb 9
Versions	Default: unknown Version 8 is affected affected from 9 to 9.19.7 (excl.) affected from 9.20.0 to 9.20.3 (excl.) Version 9.21.0 is unaffected Version 10 is unaffected

Credits

Jonas Vestberg, Reversec Sweden AB finder

References

https://doc.dynamicweb.dev/documentation/fundamentals/dw10release/security-reports.html#january-19th-2026---unauthenticated-rce-dynamicweb-9-and-dynamicweb-8

Problem Types

CWE-22 Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal') CWE

Impacts

CAPEC-650 Upload a Web Shell to a Web Server