CVE-2026-55485

piccolo-admin has a privilege escalation issue - admin to superuser via session-token disclosure in GET /api/tables/sessions/.

Full superuser takeover of the admin from any non-superuser admin account. The promoted attacker can:

• read/write/delete any row in any table the admin exposes;
• revoke any other session, locking out other admins;
• change any user's password;
• export data (including via the bulk CSV download forms);
• plant payloads (e.g. CSV-formula injections) that fire when higher-trust operators open exports.

Persistence is automatic, once the attacker writes superuser=true on their own row in step 4, the stolen cookie can be discarded.

The application assigns, modifies, tracks, or checks privileges incorrectly, allowing a user to gain elevated access. Typical impact: privilege escalation beyond the intended level.

CVE-2026-55485 has a CVSS score of 8.8 (High). The vector is network-reachable, low privileges required, and no user interaction. A CVSS score reflects the worst-case severity of the vulnerability, not your specific exposure. Whether this affects your application depends on whether the vulnerable code is present and reachable in your environment. A fixed version is available (1.14.0); upgrading removes the vulnerable code path.

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Primary (single-line): make superuser_validators reject all requests from non-superusers, there is no legitimate non-superuser use case for the user or session tables in this context:

def superuser_validators(piccolo_crud, request):
    if not request.user.user.superuser:
        raise HTTPException(
            status_code=403,
            detail="Only superusers can access this resource.",
        )

Defence in depth: in piccolo_api/session_auth/tables.py, mark SessionsBase.token with secret=True. The existing exclude_secrets=True default on PiccoloCRUD then strips the field from every response, closing the leak even if the validator is later misconfigured by a downstream consumer.

1. What is CVE-2026-55485? CVE-2026-55485 is a high-severity improper privilege management vulnerability in piccolo-admin (pip), affecting versions <= 1.13.0. It is fixed in 1.14.0. The application assigns, modifies, tracks, or checks privileges incorrectly, allowing a user to gain elevated access.
2. How severe is CVE-2026-55485? CVE-2026-55485 has a CVSS score of 8.8 (High). This score reflects the worst-case severity of the vulnerability, not your specific exposure. Whether it represents real risk in your environment depends on whether the vulnerable code is present and reachable.
3. Which versions of piccolo-admin are affected by CVE-2026-55485? piccolo-admin (pip) versions <= 1.13.0 is affected.
4. Is there a fix for CVE-2026-55485? Yes. CVE-2026-55485 is fixed in 1.14.0. Upgrade to this version or later.
5. Is CVE-2026-55485 exploitable, and should I be worried? Whether CVE-2026-55485 is exploitable in your environment depends on whether the vulnerable code is present and reachable. A CVSS score is a worst-case rating; it does not account for your specific deployment, configuration, or usage patterns. Kodem, an Intelligent Application Security platform, uses runtime intelligence to show which vulnerabilities actually execute in production, so you can focus on the ones that represent real risk. Get a demo
6. What actually determines whether CVE-2026-55485 is exploitable, and how bad it is? Exploitability and impact are not fixed properties of a CVE. They depend on runtime truth: whether the vulnerable code is present, reachable, and actually executes in your application. A high CVSS score on a dependency that never runs is not the same as real risk. Kodem, an Intelligent Application Security platform, uses runtime intelligence to reveal which vulnerabilities actually execute in production, so teams prioritize the ones that genuinely matter.
7. How do I fix CVE-2026-55485? Upgrade piccolo-admin to 1.14.0 or later.