CVE-2026-54594 (GCVE-0-2026-54594)

Vulnerability from cvelistv5 – Published: 2026-09-17 19:51 – Updated: 2026-09-18 20:09
VLAI
Title
OmniBlocks: Spamming in Discussions tab possible via disc.yml
Summary
OmniBlocks is a monorepo for the OmniBlocks project. Prior to the June 6, 2026 workflow remediation, .github/workflows/disc.yml runs for the issues opened event and the issues edited event and invokes the createDiscussion mutation whenever an issue is classified as off-topic, without recording that the issue was already converted or otherwise suppressing duplicate runs. A user who creates one off-topic issue and repeatedly edits its description before conversion completes can therefore cause multiple discussions to be created for the same issue, producing discussion spam and additional moderation work. This issue is fixed with commit 627e0f0a16a7d74b09128106b57dd7e85d2545df.
Severity
5.3 (Medium)
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N
SSVC
Exploitation: poc Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-18 20:09 UTC
CWE
  • CWE-799 - Improper Control of Interaction Frequency
Assigner
GitHub_M CNA under the mitre root
CNA scorecard C 72/100 over 7637 records in the last 180 days details
References
Impacted products
Vendor Product Version CPE status
OmniBlocks monorepo Affected: < OmniBlocks
guessed Create a notification for this product.
Show details on NVD website
To clipboard 

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-54594",
                "options": [
                  {
                    "Exploitation": "poc"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-09-18T20:09:08.371650Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-09-18T20:09:27.955Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "references": [
          {
            "tags": [
              "exploit"
            ],
            "url": "https://github.com/OmniBlocks/monorepo/security/advisories/GHSA-pq9c-3595-72jq"
          }
        ],
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "monorepo",
          "vendor": "OmniBlocks",
          "versions": [
            {
              "status": "affected",
              "version": "\u003c OmniBlocks"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "OmniBlocks is a monorepo for the OmniBlocks project. Prior to the June 6, 2026 workflow remediation, .github/workflows/disc.yml runs for the issues opened event and the issues edited event and invokes the createDiscussion mutation whenever an issue is classified as off-topic, without recording that the issue was already converted or otherwise suppressing duplicate runs. A user who creates one off-topic issue and repeatedly edits its description before conversion completes can therefore cause multiple discussions to be created for the same issue, producing discussion spam and additional moderation work. This issue is fixed with commit 627e0f0a16a7d74b09128106b57dd7e85d2545df."
        }
      ],
      "metrics": [
        {
          "cvssV4_0": {
            "attackComplexity": "LOW",
            "attackRequirements": "NONE",
            "attackVector": "NETWORK",
            "baseScore": 5.3,
            "baseSeverity": "MEDIUM",
            "privilegesRequired": "LOW",
            "subAvailabilityImpact": "NONE",
            "subConfidentialityImpact": "NONE",
            "subIntegrityImpact": "NONE",
            "userInteraction": "NONE",
            "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N",
            "version": "4.0",
            "vulnAvailabilityImpact": "NONE",
            "vulnConfidentialityImpact": "NONE",
            "vulnIntegrityImpact": "LOW"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-799",
              "description": "CWE-799: Improper Control of Interaction Frequency",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-09-17T19:51:32.309Z",
        "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "shortName": "GitHub_M"
      },
      "references": [
        {
          "name": "https://github.com/OmniBlocks/monorepo/security/advisories/GHSA-pq9c-3595-72jq",
          "tags": [
            "x_refsource_CONFIRM"
          ],
          "url": "https://github.com/OmniBlocks/monorepo/security/advisories/GHSA-pq9c-3595-72jq"
        },
        {
          "name": "https://github.com/OmniBlocks/monorepo/commit/2953ef77649fc3c206fc1ee306f74cedc31b67e3",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/OmniBlocks/monorepo/commit/2953ef77649fc3c206fc1ee306f74cedc31b67e3"
        },
        {
          "name": "https://github.com/OmniBlocks/monorepo/commit/627e0f0a16a7d74b09128106b57dd7e85d2545df",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/OmniBlocks/monorepo/commit/627e0f0a16a7d74b09128106b57dd7e85d2545df"
        }
      ],
      "source": {
        "advisory": "GHSA-pq9c-3595-72jq",
        "discovery": "UNKNOWN"
      },
      "title": "OmniBlocks: Spamming in Discussions tab possible via disc.yml"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
    "assignerShortName": "GitHub_M",
    "cveId": "CVE-2026-54594",
    "datePublished": "2026-09-17T19:51:32.309Z",
    "dateReserved": "2026-06-15T19:45:23.539Z",
    "dateUpdated": "2026-09-18T20:09:27.955Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "epss": {
      "cve": "CVE-2026-54594",
      "date": "2026-10-14",
      "epss": "0.00451",
      "percentile": "0.37601"
    },
    "nvd": {
      "cve": {
        "affected": [
          {
            "affectedData": [
              {
                "product": "monorepo",
                "vendor": "OmniBlocks",
                "versions": [
                  {
                    "status": "affected",
                    "version": "\u003c OmniBlocks"
                  }
                ]
              }
            ],
            "source": "security-advisories@github.com"
          }
        ],
        "cveTags": [],
        "descriptions": [
          {
            "lang": "en",
            "value": "OmniBlocks is a monorepo for the OmniBlocks project. Prior to the June 6, 2026 workflow remediation, .github/workflows/disc.yml runs for the issues opened event and the issues edited event and invokes the createDiscussion mutation whenever an issue is classified as off-topic, without recording that the issue was already converted or otherwise suppressing duplicate runs. A user who creates one off-topic issue and repeatedly edits its description before conversion completes can therefore cause multiple discussions to be created for the same issue, producing discussion spam and additional moderation work. This issue is fixed with commit 627e0f0a16a7d74b09128106b57dd7e85d2545df."
          }
        ],
        "id": "CVE-2026-54594",
        "lastModified": "2026-09-23T18:12:04.247",
        "metrics": {
          "cvssMetricV40": [
            {
              "cvssData": {
                "Automatable": "NOT_DEFINED",
                "Recovery": "NOT_DEFINED",
                "Safety": "NOT_DEFINED",
                "attackComplexity": "LOW",
                "attackRequirements": "NONE",
                "attackVector": "NETWORK",
                "availabilityRequirement": "NOT_DEFINED",
                "baseScore": 5.3,
                "baseSeverity": "MEDIUM",
                "confidentialityRequirement": "NOT_DEFINED",
                "exploitMaturity": "NOT_DEFINED",
                "integrityRequirement": "NOT_DEFINED",
                "modifiedAttackComplexity": "NOT_DEFINED",
                "modifiedAttackRequirements": "NOT_DEFINED",
                "modifiedAttackVector": "NOT_DEFINED",
                "modifiedPrivilegesRequired": "NOT_DEFINED",
                "modifiedSubAvailabilityImpact": "NOT_DEFINED",
                "modifiedSubConfidentialityImpact": "NOT_DEFINED",
                "modifiedSubIntegrityImpact": "NOT_DEFINED",
                "modifiedUserInteraction": "NOT_DEFINED",
                "modifiedVulnAvailabilityImpact": "NOT_DEFINED",
                "modifiedVulnConfidentialityImpact": "NOT_DEFINED",
                "modifiedVulnIntegrityImpact": "NOT_DEFINED",
                "privilegesRequired": "LOW",
                "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:L/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X",
                "version": "4.0",
                "vulnAvailabilityImpact": "NONE",
                "vulnConfidentialityImpact": "NONE",
                "vulnIntegrityImpact": "LOW",
                "vulnerabilityResponseEffort": "NOT_DEFINED"
              },
              "source": "security-advisories@github.com",
              "type": "Secondary"
            }
          ],
          "ssvcV203": [
            {
              "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
              "ssvcData": {
                "id": "CVE-2026-54594",
                "options": [
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                    "exploitation": "poc"
                  },
                  {
                    "automatable": "no"
                  },
                  {
                    "technicalImpact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-09-18T20:09:08.371650Z",
                "version": "2.0.3"
              }
            }
          ]
        },
        "published": "2026-09-17T20:16:51.670",
        "references": [
          {
            "source": "security-advisories@github.com",
            "url": "https://github.com/OmniBlocks/monorepo/commit/2953ef77649fc3c206fc1ee306f74cedc31b67e3"
          },
          {
            "source": "security-advisories@github.com",
            "url": "https://github.com/OmniBlocks/monorepo/commit/627e0f0a16a7d74b09128106b57dd7e85d2545df"
          },
          {
            "source": "security-advisories@github.com",
            "url": "https://github.com/OmniBlocks/monorepo/security/advisories/GHSA-pq9c-3595-72jq"
          },
          {
            "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
            "url": "https://github.com/OmniBlocks/monorepo/security/advisories/GHSA-pq9c-3595-72jq"
          }
        ],
        "sourceIdentifier": "security-advisories@github.com",
        "vulnStatus": "Awaiting Analysis",
        "weaknesses": [
          {
            "description": [
              {
                "lang": "en",
                "value": "CWE-799"
              }
            ],
            "source": "security-advisories@github.com",
            "type": "Secondary"
          }
        ]
      }
    },
    "vulnrichment": {
      "containers": {
        "adp": [
          {
            "metrics": [
              {
                "other": {
                  "content": {
                    "id": "CVE-2026-54594",
                    "options": [
                      {
                        "Exploitation": "poc"
                      },
                      {
                        "Automatable": "no"
                      },
                      {
                        "Technical Impact": "partial"
                      }
                    ],
                    "role": "CISA Coordinator",
                    "timestamp": "2026-09-18T20:09:08.371650Z",
                    "version": "2.0.3"
                  },
                  "type": "ssvc"
                }
              }
            ],
            "providerMetadata": {
              "dateUpdated": "2026-09-18T20:09:24.148Z",
              "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
              "shortName": "CISA-ADP"
            },
            "references": [
              {
                "tags": [
                  "exploit"
                ],
                "url": "https://github.com/OmniBlocks/monorepo/security/advisories/GHSA-pq9c-3595-72jq"
              }
            ],
            "title": "CISA ADP Vulnrichment"
          }
        ],
        "cna": {
          "affected": [
            {
              "product": "monorepo",
              "vendor": "OmniBlocks",
              "versions": [
                {
                  "status": "affected",
                  "version": "\u003c OmniBlocks"
                }
              ]
            }
          ],
          "descriptions": [
            {
              "lang": "en",
              "value": "OmniBlocks is a monorepo for the OmniBlocks project. Prior to the June 6, 2026 workflow remediation, .github/workflows/disc.yml runs for the issues opened event and the issues edited event and invokes the createDiscussion mutation whenever an issue is classified as off-topic, without recording that the issue was already converted or otherwise suppressing duplicate runs. A user who creates one off-topic issue and repeatedly edits its description before conversion completes can therefore cause multiple discussions to be created for the same issue, producing discussion spam and additional moderation work. This issue is fixed with commit 627e0f0a16a7d74b09128106b57dd7e85d2545df."
            }
          ],
          "metrics": [
            {
              "cvssV4_0": {
                "attackComplexity": "LOW",
                "attackRequirements": "NONE",
                "attackVector": "NETWORK",
                "baseScore": 5.3,
                "baseSeverity": "MEDIUM",
                "privilegesRequired": "LOW",
                "subAvailabilityImpact": "NONE",
                "subConfidentialityImpact": "NONE",
                "subIntegrityImpact": "NONE",
                "userInteraction": "NONE",
                "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N",
                "version": "4.0",
                "vulnAvailabilityImpact": "NONE",
                "vulnConfidentialityImpact": "NONE",
                "vulnIntegrityImpact": "LOW"
              }
            }
          ],
          "problemTypes": [
            {
              "descriptions": [
                {
                  "cweId": "CWE-799",
                  "description": "CWE-799: Improper Control of Interaction Frequency",
                  "lang": "en",
                  "type": "CWE"
                }
              ]
            }
          ],
          "providerMetadata": {
            "dateUpdated": "2026-09-17T19:51:32.309Z",
            "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
            "shortName": "GitHub_M"
          },
          "references": [
            {
              "name": "https://github.com/OmniBlocks/monorepo/security/advisories/GHSA-pq9c-3595-72jq",
              "tags": [
                "x_refsource_CONFIRM"
              ],
              "url": "https://github.com/OmniBlocks/monorepo/security/advisories/GHSA-pq9c-3595-72jq"
            },
            {
              "name": "https://github.com/OmniBlocks/monorepo/commit/2953ef77649fc3c206fc1ee306f74cedc31b67e3",
              "tags": [
                "x_refsource_MISC"
              ],
              "url": "https://github.com/OmniBlocks/monorepo/commit/2953ef77649fc3c206fc1ee306f74cedc31b67e3"
            },
            {
              "name": "https://github.com/OmniBlocks/monorepo/commit/627e0f0a16a7d74b09128106b57dd7e85d2545df",
              "tags": [
                "x_refsource_MISC"
              ],
              "url": "https://github.com/OmniBlocks/monorepo/commit/627e0f0a16a7d74b09128106b57dd7e85d2545df"
            }
          ],
          "source": {
            "advisory": "GHSA-pq9c-3595-72jq",
            "discovery": "UNKNOWN"
          },
          "title": "OmniBlocks: Spamming in Discussions tab possible via disc.yml"
        }
      },
      "cveMetadata": {
        "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "assignerShortName": "GitHub_M",
        "cveId": "CVE-2026-54594",
        "datePublished": "2026-09-17T19:51:32.309Z",
        "dateReserved": "2026-06-15T19:45:23.539Z",
        "dateUpdated": "2026-09-18T20:09:27.955Z",
        "state": "PUBLISHED"
      },
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    }
  }
}



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