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Roo-Code CVE-2026-81836

| EUVDEUVD-2026-67279 LOW
Cleartext Transmission of Sensitive Information (CWE-319)
2026-08-27 VulDB GHSA-57j6-cfwj-h582
Information Disclosure Roo Code
2.9
CVSS 4.0 · Vendor: VulDB

Severity by source

Vendor (VulDB) PRIMARY
2.9 MEDIUM
CVSS:4.0/AV:N/AC:H/AT:N/PR:N/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
vuln.today AI
3.7 LOW

Network vector with high complexity for MITM; no privileges or interaction needed; only limited confidentiality impact from token exposure.

3.1 AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N
4.0 AV:N/AC:H/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N

Primary rating from Vendor (VulDB).

CVSS VectorVendor: VulDB

CVSS:4.0/AV:N/AC:H/AT:N/PR:N/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
Attack Vector
Network
Attack Complexity
High
Privileges Required
None
User Interaction
None
Scope
X

Lifecycle Timeline

4
Severity Changed
Aug 28, 2026 - 00:22 NVD
MEDIUM LOW
CVSS changed
Aug 28, 2026 - 00:22 NVD
6.3 (MEDIUM) 2.9 (LOW)
Analysis Generated
Aug 28, 2026 - 00:08 vuln.today
CVE Published
Aug 27, 2026 - 21:15 cve.org
MEDIUM 6.3

DescriptionCVE.org

A vulnerability was detected in RooCodeInc Roo-Code up to 3.51.1. This vulnerability affects unknown code of the file src/integrations/claude-code/oauth.ts of the component OAuth Callback. The manipulation results in cleartext transmission of sensitive information. The attack may be performed from remote. A high complexity level is associated with this attack. It is stated that the exploitability is difficult. The exploit is now public 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.

AnalysisAI

Cleartext transmission of OAuth credentials in RooCodeInc Roo-Code up to version 3.51.1 exposes sensitive OAuth tokens to interception via the OAuth callback handler in src/integrations/claude-code/oauth.ts. The vendor has officially archived the repository and explicitly discourages continued use, meaning no patch will be issued. …

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Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata

Access
Attain MITM position on developer's network
Delivery
Victim initiates Roo-Code Claude OAuth flow
Exploit
Intercept cleartext OAuth callback traffic
Execution
Extract authorization code or access token
Persist
Replay token to OAuth provider
Impact
Access victim's AI provider account
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Vulnerability AssessmentAI

Exploitation Exploitation requires the attacker to occupy a network-adjacent or network-path position between the victim developer's machine and the OAuth provider endpoint (consistent with AC:H in the CVSS 4.0 vector). … Additional conditions and limiting factors are described in the full assessment.
Risk Assessment The CVSS 4.0 score of 6.3 (Medium) with vector AV:N/AC:H/AT:N/PR:N/UI:N/VC:L reflects a network-reachable flaw requiring high attack complexity - consistent with the description characterizing exploitability as difficult, likely demanding a man-in-the-middle network position. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in.
Exploit Scenario An attacker with a man-in-the-middle position on the network path between a developer's workstation and the OAuth provider intercepts the OAuth callback traffic from Roo-Code's oauth.ts handler. Because the token or authorization code is transmitted in cleartext, the attacker captures the OAuth credential without needing any authentication or special software beyond a network sniffer. …
Remediation No vendor-released patch has been identified at time of analysis, and none is expected - the vendor has explicitly archived the project and ceased support. … Detailed patch versions, workarounds, and compensating controls in full report.
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CVE-2026-81836 vulnerability details – vuln.today
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