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CVE Vulnerability Details :
CVE-2026-56316
PUBLISHED
More InfoOfficial Page
Assigner-VulnCheck
Assigner Org ID-83251b91-4cc7-4094-a5c7-464a1b83ea10
View Known Exploited Vulnerability (KEV) details
Published At-21 Jun, 2026 | 13:26
Updated At-24 Jun, 2026 | 17:56
Rejected At-
▼CVE Numbering Authority (CNA)
Cap-go - Job Existence Oracle via Unauthenticated OPTIONS /build/upload/:jobId/*

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 Products
Vendor
Cap-go
Product
capgo
Default Status
unaffected
Versions
Affected
  • From 0 before 12.128.2 (semver)
Unaffected
  • 12.128.2 (semver)
Problem Types
TypeCWE IDDescription
CWECWE-203Observable Discrepancy
Type: CWE
CWE ID: CWE-203
Description: Observable Discrepancy
Metrics
VersionBase scoreBase severityVector
4.06.9MEDIUM
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N
3.15.3MEDIUM
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
Version: 4.0
Base score: 6.9
Base severity: MEDIUM
Vector:
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N
Version: 3.1
Base score: 5.3
Base severity: MEDIUM
Vector:
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
Metrics Other Info
Impacts
CAPEC IDDescription
Solutions
Configurations
Workarounds
Exploits
Credits
reporter
Judel777
Timeline
EventDate
Replaced By
Rejected Reason
References
HyperlinkResource
https://github.com/Cap-go/capgo/security/advisories/GHSA-9c2x-7h5x-37gm
vendor-advisory
https://www.vulncheck.com/advisories/cap-go-job-existence-oracle-via-unauthenticated-options-build-upload-jobid
third-party-advisory
Hyperlink: https://github.com/Cap-go/capgo/security/advisories/GHSA-9c2x-7h5x-37gm
Resource:
vendor-advisory
Hyperlink: https://www.vulncheck.com/advisories/cap-go-job-existence-oracle-via-unauthenticated-options-build-upload-jobid
Resource:
third-party-advisory
▼Authorized Data Publishers (ADP)
CISA ADP Vulnrichment
Affected Products
Metrics
VersionBase scoreBase severityVector
Metrics Other Info
Impacts
CAPEC IDDescription
Solutions
Configurations
Workarounds
Exploits
Credits
Timeline
EventDate
Replaced By
Rejected Reason
References
HyperlinkResource
https://github.com/Cap-go/capgo/security/advisories/GHSA-9c2x-7h5x-37gm
exploit
Hyperlink: https://github.com/Cap-go/capgo/security/advisories/GHSA-9c2x-7h5x-37gm
Resource:
exploit
Details not found