Cleartext Transmission Vulnerability in Roo-Code OAuth Callback by RooCodeInc
CVE-2026-81836

6.3MEDIUM

Key Information:

Vendor

Roocodeinc

Status
Roo-code
Vendor
CVE Published:
27 August 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-81836?

A security issue in RooCodeInc's Roo-Code software allows for the cleartext transmission of sensitive information through the OAuth Callback component. Specifically, the vulnerability is found in the file src/integrations/claude-code/oauth.ts, leading to potential exposure of critical data during transmission. This issue, reported multiple times to the vendor, affects a product that is no longer supported, raising concerns for users regarding its ongoing security. Exploiting this vulnerability requires high complexity, and although its exploitability is noted as difficult, it is now publicly available, placing users at risk.

Affected Version(s)

Roo-Code 3.51.0

Roo-Code 3.51.1

Exploit Proof of Concept (PoC)

PoC code is written by security researchers to demonstrate the vulnerability can be exploited. PoC code is also a key component for weaponization which could lead to ransomware.

CVE-2026-81836 - Proof of Concept

References

https://vuldb.com/vuln/396169
vdb-entry
https://vuldb.com/vuln/396169/cti
signaturepermissions-required
https://vuldb.com/cve/CVE-2026-81836
third-party-advisory

CVSS V4

Score:
6.3
Severity:
MEDIUM
Confidentiality:
Low
Integrity:
None
Availability:
None
Attack Vector:
Network
Attack Complexity:
High
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

Credit

tchen200311 (VulDB User)
VulDB CNA Team
.