CVE-2026-56316 (GCVE-0-2026-56316)

Vulnerability from cvelistv5 – Published: 2026-06-21 13:26 – Updated: 2026-06-21 13:26
VLAI
Title
Cap-go - Job Existence Oracle via Unauthenticated OPTIONS /build/upload/:jobId/*
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.
Severity
6.9 (Medium)
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
5.3 (Medium)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
CWE
Assigner
References
Impacted products
Vendor Product Version
Cap-go capgo Affected: 0 , < 12.128.2 (semver)
Unaffected: 12.128.2 (semver)
Create a notification for this product.
Date Public
2026-03-03 00:00
Credits
Judel777
Show details on NVD website
To clipboard 

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          "vendor": "Cap-go",
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        }
      ],
      "metrics": [
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            "Recovery": "NOT_DEFINED",
            "Safety": "NOT_DEFINED",
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            "attackRequirements": "NONE",
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            "baseScore": 6.9,
            "baseSeverity": "MEDIUM",
            "exploitMaturity": "NOT_DEFINED",
            "privilegesRequired": "NONE",
            "providerUrgency": "NOT_DEFINED",
            "subAvailabilityImpact": "NONE",
            "subConfidentialityImpact": "NONE",
            "subIntegrityImpact": "NONE",
            "userInteraction": "NONE",
            "valueDensity": "NOT_DEFINED",
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            "scope": "UNCHANGED",
            "userInteraction": "NONE",
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            "version": "3.1"
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      "problemTypes": [
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              "description": "Observable Discrepancy",
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      "providerMetadata": {
        "dateUpdated": "2026-06-21T13:26:56.210Z",
        "orgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10",
        "shortName": "VulnCheck"
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          "name": "GHSA Advisory GHSA-9c2x-7h5x-37gm",
          "tags": [
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          "url": "https://github.com/Cap-go/capgo/security/advisories/GHSA-9c2x-7h5x-37gm"
        },
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          "tags": [
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        }
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      "title": "Cap-go - Job Existence Oracle via Unauthenticated OPTIONS /build/upload/:jobId/*",
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    "assignerShortName": "VulnCheck",
    "cveId": "CVE-2026-56316",
    "datePublished": "2026-06-21T13:26:56.210Z",
    "dateReserved": "2026-06-20T12:59:07.917Z",
    "dateUpdated": "2026-06-21T13:26:56.210Z",
    "state": "PUBLISHED"
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}


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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

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Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
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  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


Detection rules are retrieved from Rulezet.