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CVE-2026-69098 (GCVE-0-2026-69098)

Vulnerability from cvelistv5 – Published: 2026-08-04 15:15 – Updated: 2026-08-05 14:54 X_Open Source
VLAI
Title
kotaemon 0.12.0 Unauthenticated Remote Code Execution via Insecure Deserialization
Summary
kotaemon through 0.12.0 contains an insecure deserialization vulnerability in the check_connection endpoint that allows unauthenticated attackers to instantiate arbitrary Python classes by supplying crafted YAML/JSON input with a __type__ field. Attackers can exploit this to override the __type__ field with subprocess.check_output and arbitrary arguments, achieving remote code execution with application process privileges.
SSVC
Exploitation: poc Automatable: yes Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-05 14:54 UTC
CWE
  • CWE-502 - Deserialization of Untrusted Data
References
Impacted products
Vendor Product Version CPE status
Cinnamon kotaemon Affected: 0 , ≤ 0.12.0 (semver)
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    cpe:2.3:a:cinnamon:kotaemon:0.3.0:*:*:*:*:*:*:*
    cpe:2.3:a:cinnamon:kotaemon:0.3.1:*:*:*:*:*:*:*
    cpe:2.3:a:cinnamon:kotaemon:0.3.2:*:*:*:*:*:*:*
    cpe:2.3:a:cinnamon:kotaemon:0.3.3:*:*:*:*:*:*:*
    cpe:2.3:a:cinnamon:kotaemon:0.3.4:*:*:*:*:*:*:*
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    cpe:2.3:a:cinnamon:kotaemon:0.3.6:*:*:*:*:*:*:*
    cpe:2.3:a:cinnamon:kotaemon:0.4.0:*:*:*:*:*:*:*
    cpe:2.3:a:cinnamon:kotaemon:0.4.1:*:*:*:*:*:*:*
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    cpe:2.3:a:cinnamon:kotaemon:0.4.4:*:*:*:*:*:*:*
    cpe:2.3:a:cinnamon:kotaemon:0.4.5:*:*:*:*:*:*:*
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    cpe:2.3:a:cinnamon:kotaemon:0.4.8:*:*:*:*:*:*:*
    cpe:2.3:a:cinnamon:kotaemon:0.4.9:*:*:*:*:*:*:*
Create a notification for this product.
Date Public
2026-06-29 00:00
Credits
Show details on NVD website

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                "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N",
                "version": "4.0",
                "vulnAvailabilityImpact": "HIGH",
                "vulnConfidentialityImpact": "HIGH",
                "vulnIntegrityImpact": "HIGH",
                "vulnerabilityResponseEffort": "NOT_DEFINED"
              },
              "format": "CVSS",
              "scenarios": [
                {
                  "lang": "en",
                  "value": "GENERAL"
                }
              ]
            },
            {
              "cvssV3_1": {
                "attackComplexity": "LOW",
                "attackVector": "NETWORK",
                "availabilityImpact": "HIGH",
                "baseScore": 9.8,
                "baseSeverity": "CRITICAL",
                "confidentialityImpact": "HIGH",
                "integrityImpact": "HIGH",
                "privilegesRequired": "NONE",
                "scope": "UNCHANGED",
                "userInteraction": "NONE",
                "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
                "version": "3.1"
              },
              "format": "CVSS",
              "scenarios": [
                {
                  "lang": "en",
                  "value": "GENERAL"
                }
              ]
            }
          ],
          "problemTypes": [
            {
              "descriptions": [
                {
                  "cweId": "CWE-502",
                  "description": "Deserialization of Untrusted Data",
                  "lang": "en",
                  "type": "CWE"
                }
              ]
            }
          ],
          "providerMetadata": {
            "dateUpdated": "2026-08-04T15:15:06.018Z",
            "orgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10",
            "shortName": "VulnCheck"
          },
          "references": [
            {
              "name": "Researcher Disclosure",
              "tags": [
                "technical-description",
                "exploit"
              ],
              "url": "https://github.com/Cinnamon/kotaemon/issues/844"
            },
            {
              "tags": [
                "third-party-advisory"
              ],
              "url": "https://www.vulncheck.com/advisories/kotaemon-unauthenticated-remote-code-execution-via-insecure-deserialization"
            }
          ],
          "tags": [
            "x_open-source"
          ],
          "title": "kotaemon 0.12.0 Unauthenticated Remote Code Execution via Insecure Deserialization",
          "x_generator": {
            "engine": "vulncheck-endgame"
          }
        }
      },
      "cveMetadata": {
        "assignerOrgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10",
        "assignerShortName": "VulnCheck",
        "cveId": "CVE-2026-69098",
        "datePublished": "2026-08-04T15:15:06.018Z",
        "dateReserved": "2026-08-03T10:44:14.336Z",
        "dateUpdated": "2026-08-05T14:54:51.084Z",
        "state": "PUBLISHED"
      },
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}



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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

Author Source Type Date Other

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.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • 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.

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Detection rules are retrieved from Rulezet.

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Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.


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