CVE-2026-61640
OIDC SSRF in Wallos allows access to cloud metadata and internal services
Is CVE-2026-61640 being exploited?
Not confirmed. CVE-2026-61640 does not appear in CISA's Known Exploited Vulnerabilities catalog, which records only exploitation that has been observed and reported publicly. That is evidence of absence of a report, not evidence the flaw is unattacked. EPSS currently estimates a 0.31% probability of exploitation in the next 30 days.
How severe is CVE-2026-61640?
CVE-2026-61640 is rated High with a CVSS score of 8.5. Severity describes how bad exploitation would be, not how likely it is: pair it with exploitation evidence before deciding what to patch first.
Is there a patch for CVE-2026-61640?
Yes. A fix has been recorded for CVE-2026-61640. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2026-61640 affect?
CVE-2026-61640 affects Wallos < 4.9.6 (self-hosted), OIDC-enabled Wallos instances with admin-configured token/user_info URLs. Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-61640?
Upgrade to Wallos v4.9.6; block metadata IPs; validate/restrict admin OIDC URLs
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
Server-Side Request Forgery via admin-set OIDC endpoints allows reading cloud metadata (169.254.169.254) and internal services, enabling credential theft, pivoting, or data exfiltration.
Immediate action required
- affected< 4.9.6
As published in the CVE Program record. A version outside these ranges is not a statement that it is unaffected — vendors sometimes understate a range, and distribution-backported builds carry upstream numbers that do not reflect what was patched into them.