CVE-2026-56316

Summary

Cap-go before 12.128.2 contains an information disclosure vulnerability in the OPTIONS /build/upload/:jobId/* endpoint that allows unauthenticated attackers to enumerate valid builder job IDs through observable response discrepancies. Attackers can probe the endpoint without authentication to distinguish valid job IDs from invalid ones and generate sustained unauthenticated traffic for resource consumption.

Affected Software

VendorProductVersion RangeStatus
Cap-gocapgo0 < 12.128.2affected
Cap-gocapgo12.128.2unaffected

Weaknesses

  • CWE-203: Observable Discrepancy

ADP Enrichment

CISA ADP Vulnrichment

  • SSVC:
  • Exploitation: poc
    • Automatable: yes
    • Technical Impact: partial

Additional References

References