Reference page — cumulative record through Sunday, October 4, 2026 UTC. Reference pages update as the archive grows; only dated daily editions are immutable pages of record.
CVE-2026-81835
RooCodeInc Roo-Code MCP Integration Trust Model malicious_mcp_server.py fetch_instructions code injection
AV AC AT PR UI VC VI VA CVSS EPSS %ile KEV
N L N L P L L L 2.0 .0030 20.6 —
AFFECTED
Product Versions Fixed
Roo-Code 3.51.0 – —
TIMELINE
Aug 27 Reserved by VulDB
Aug 27 Published (CNA: VulDB)
Aug 28 RESCORED — CVE-2026-81835 (RooCodeInc Roo-Code). CVSS 5.1 → 2 (NVD).
Description
A security vulnerability has been detected in RooCodeInc Roo-Code up to 3.51.1. This affects the function fetch_instructions of the file malicious_mcp_server.py of the component MCP Integration Trust Model. The manipulation leads to code injection. The attack is possible to be carried out remotely. The exploit has been disclosed publicly and may be used. Multiple isses were reported to the vendor beforehand. They explain, that "they all apply to Roo Code, a project we no longer support - the repository was archived a while ago, and we don't encourage anyone to use it." This vulnerability only affects products that are no longer supported by the maintainer.
Lifecycle
Complete event history — 3 events, chronological
| Date | Event | Detail |
| August 27, 2026 | Reserved | Reserved by VulDB |
| August 27, 2026 | Published | Published (CNA: VulDB) |
| August 28, 2026 | RESCORED | RESCORED — CVE-2026-81835 (RooCodeInc Roo-Code). CVSS 5.1 → 2 (NVD). |
Affected
Affected products and packages — 1 row
| Vendor | Product / Package | Ecosystem | Version introduced | Fixed |
| RooCodeInc | Roo-Code | — | 3.51.0 | — |
About this page
This is a reference page, not a dated page of record. It assembles the complete lifecycle of CVE-2026-81835 from the CVE Program record, NVD enrichment, the CISA KEV catalog, EPSS, and OSV advisories. The box score's numbers (CVSS, EPSS, KEV status) are current as of Sunday, October 4, 2026 UTC and are re-derived as the archive grows; only dated daily editions are immutable pages of record. The authoritative source for this identifier is cve.org.