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CVE-2026-56316

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.
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:232cde4dbabe9e9088a2234b678ecaded380ae6e086f37161e8cb4455a95d273
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
1

Preserved source conflicts

No provider value was silently selected as the winner.

cvss · 2 assertions

{"metric":{"Automatable":"NOT_DEFINED","Recovery":"NOT_DEFINED","Safety":"NOT_DEFINED","attackComplexity":"LOW","attackRequirements":"NONE","attackVector":"NETWORK","baseScore":6.9,"baseSeverity":"MEDIUM","exploitMaturity":"NOT_DEFINED","privilegesRequired":"NONE","providerUrgency":"NOT_DEFINED","subAvailabilityImpact":"NONE","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","userInteraction":"NONE","valueDensity":"NOT_DEFINED","vectorString":"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":"4.0","vulnAvailabilityImpact":"NONE","vulnConfidentialityImpact"…

  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:f88d7a397346d553ec2dcd334dba07c63a4dcbce056e2abe5f3a3ab443ca6182 · sha256:520b553f8e986a92… · /containers/cna/metrics/0/cvssV4_0

{"metric":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"NONE","baseScore":5.3,"baseSeverity":"MEDIUM","confidentialityImpact":"LOW","integrityImpact":"NONE","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N","version":"3.1"},"metric_type":"cvssV3_1"}

  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:f88d7a397346d553ec2dcd334dba07c63a4dcbce056e2abe5f3a3ab443ca6182 · sha256:520b553f8e986a92… · /containers/cna/metrics/1/cvssV3_1

Affected products and versions

1 source assertion
{"defaultStatus":"unaffected","product":"capgo","vendor":"Cap-go","versions":[{"lessThan":"12.128.2","status":"affected","version":"0","versionType":"semver"},{"status":"unaffected","version":"12.128.2","versionType":"semver"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:f88d7a397346d553ec2dcd334dba07c63a4dcbce056e2abe5f3a3ab443ca6182 · sha256:520b553f8e986a92… · /containers/cna/affected/0

Provider-owned CVSS observations

2 source assertions
{"metric":{"Automatable":"NOT_DEFINED","Recovery":"NOT_DEFINED","Safety":"NOT_DEFINED","attackComplexity":"LOW","attackRequirements":"NONE","attackVector":"NETWORK","baseScore":6.9,"baseSeverity":"MEDIUM","exploitMaturity":"NOT_DEFINED","privilegesRequired":"NONE","providerUrgency":"NOT_DEFINED","subAvailabilityImpact":"NONE","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","userInteraction":"NONE","valueDensity":"NOT_DEFINED","vectorString":"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":"4.0","vulnAvailabilityImpact":"NONE","vulnConfidentialityImpact"…
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:f88d7a397346d553ec2dcd334dba07c63a4dcbce056e2abe5f3a3ab443ca6182 · sha256:520b553f8e986a92… · /containers/cna/metrics/0/cvssV4_0
{"metric":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"NONE","baseScore":5.3,"baseSeverity":"MEDIUM","confidentialityImpact":"LOW","integrityImpact":"NONE","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N","version":"3.1"},"metric_type":"cvssV3_1"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:f88d7a397346d553ec2dcd334dba07c63a4dcbce056e2abe5f3a3ab443ca6182 · sha256:520b553f8e986a92… · /containers/cna/metrics/1/cvssV3_1

CWE assertions

1 source assertion
{"cweId":"CWE-203","description":"Observable Discrepancy","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:f88d7a397346d553ec2dcd334dba07c63a4dcbce056e2abe5f3a3ab443ca6182 · sha256:520b553f8e986a92… · /containers/cna/problemTypes/0/descriptions/0

Source references

3 source assertions
{"tags":["exploit"],"url":"https://github.com/Cap-go/capgo/security/advisories/GHSA-9c2x-7h5x-37gm"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:f88d7a397346d553ec2dcd334dba07c63a4dcbce056e2abe5f3a3ab443ca6182 · sha256:520b553f8e986a92… · /containers/adp/0/references/0
{"name":"GHSA Advisory GHSA-9c2x-7h5x-37gm","tags":["vendor-advisory"],"url":"https://github.com/Cap-go/capgo/security/advisories/GHSA-9c2x-7h5x-37gm"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:f88d7a397346d553ec2dcd334dba07c63a4dcbce056e2abe5f3a3ab443ca6182 · sha256:520b553f8e986a92… · /containers/cna/references/0
{"name":"VulnCheck Advisory: Cap-go - Job Existence Oracle via Unauthenticated OPTIONS /build/upload/:jobId/*","tags":["third-party-advisory"],"url":"https://www.vulncheck.com/advisories/cap-go-job-existence-oracle-via-unauthenticated-options-build-upload-jobid"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:f88d7a397346d553ec2dcd334dba07c63a4dcbce056e2abe5f3a3ab443ca6182 · sha256:520b553f8e986a92… · /containers/cna/references/1

Attribution and limitations

  • CVE Program CVEList V5: Reproduce the MITRE copyright designation and CVE license in copies. Source →

Provider severity values are preserved separately. Baitaphish does not convert them into a risk rating, infer affected products, or treat EPSS as observed exploitation.

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