Account takeover via unvalidated SSO callback
Published Aug 4, 2026 · Updated Aug 4, 2026
Open redirect in KodCloud KodBox 1.67 Build 02 allows remote attackers to steal a logged-in user's API token via a crafted SSO link. The /user/sso/apiLogin endpoint accepts callbackUrl without restricting it to trusted domains, then appends a reusable kodTokenApi value to the redirect. Exploitation requires a logged-in victim to visit the link; attackers can exchange the captured token for session material and access the victim's account.
Summary
What happened
Open redirect in KodCloud KodBox 1.67 Build 02 allows remote attackers to steal a logged-in user's API token via a crafted SSO link. The /user/sso/apiLogin endpoint accepts callbackUrl without restricting it to trusted domains, then appends a reusable kodTokenApi value to the redirect. Exploitation requires a logged-in victim to visit the link; attackers can exchange the captured token for session material and access the victim's account.
The record
- CVE
- CVE-2026-18721
- Published
- Aug 4, 2026
- Updated
- Aug 4, 2026
- Vendor
- kalcaddle
- Product
- KodBox
- Classifications
- CWE-601, T1528
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Aug 4, 2026CVE publishedPublication date reported by the CVE source.
- Aug 4, 2026Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=1.67 Build 02
What conditions does exploitation require?
What is affected?
Attacks
What attackers are doing with it
Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.
Weakness, pattern, technique
Public exploit references
- KodBox apiLogin callbackUrl token-leak proof of conceptproof of concept · demonstrated
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Technologies
Your stack
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Your stack
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