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CVE-2026-62331 (GCVE-0-2026-62331)

Vulnerability from nvd – Published: 2026-10-30 19:00 – Updated: 2026-10-30 19:46

Title

praktor: Telegram upload traversal permits persistent agent instruction injection

Summary

praktor is a multi-agent Claude Code orchestrator with Telegram input and output, Docker isolation, and a Mission Control UI. Prior to 0.9.1, both Telegram upload sites in `internal/telegram/bot.go` concatenate the attacker-controlled document filename into a destination path without sanitization, and `path.Join` collapses parent-directory traversal. A remote Telegram user who can message the bot can therefore write outside `uploads/` within the persistent agent workspace mounted at `/workspace/agent`. Because `allow_from: []` permits all senders by default, no prior authentication or privilege is required in that configuration. The attacker can plant or overwrite `CLAUDE.md`, instruction, skill, hook, or configuration files that the Claude agent reads and operates on across later runs, turning a document upload into stored instruction injection. The demonstrated arbitrary-write scope is the persistent agent workspace volume, not an unrestricted host-filesystem write. This issue is fixed in version 0.9.1.

Severity

8.2 (High)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:N

SSVC

Exploitation: none Automatable: yes Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-10-30 19:45 UTC

CWE

CWE-22 - Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')

Assigner

GitHub_M CNA under the mitre root

CNA scorecard C 72/100 over 7886 records in the last 180 days details

References

4 references

URL	Tags
https://github.com/mtzanidakis/praktor/security/a…	x_refsource_CONFIRM
https://github.com/mtzanidakis/praktor/pull/228	x_refsource_MISC
https://github.com/mtzanidakis/praktor/commit/c37…	x_refsource_MISC
https://github.com/mtzanidakis/praktor/releases/t…	x_refsource_MISC

Impacted products

1 product

Vendor	Product	Version
mtzanidakis	praktor	Affected: < 0.9.1

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-62331",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "yes"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-10-30T19:45:09.898798Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-10-30T19:46:25.082Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "praktor",
          "vendor": "mtzanidakis",
          "versions": [
            {
              "status": "affected",
              "version": "\u003c 0.9.1"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "praktor is a multi-agent Claude Code orchestrator with Telegram input and output, Docker isolation, and a Mission Control UI. Prior to 0.9.1, both Telegram upload sites in `internal/telegram/bot.go` concatenate the attacker-controlled document filename into a destination path without sanitization, and `path.Join` collapses parent-directory traversal. A remote Telegram user who can message the bot can therefore write outside `uploads/` within the persistent agent workspace mounted at `/workspace/agent`. Because `allow_from: []` permits all senders by default, no prior authentication or privilege is required in that configuration. The attacker can plant or overwrite `CLAUDE.md`, instruction, skill, hook, or configuration files that the Claude agent reads and operates on across later runs, turning a document upload into stored instruction injection. The demonstrated arbitrary-write scope is the persistent agent workspace volume, not an unrestricted host-filesystem write. This issue is fixed in version 0.9.1."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "NONE",
            "baseScore": 8.2,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "LOW",
            "integrityImpact": "HIGH",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:N",
            "version": "3.1"
          }
        }
      ],
      "problemTypes": [
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          "descriptions": [
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              "cweId": "CWE-22",
              "description": "CWE-22: Improper Limitation of a Pathname to a Restricted Directory (\u0027Path Traversal\u0027)",
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              "type": "CWE"
            }
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      "providerMetadata": {
        "dateUpdated": "2026-10-30T19:00:25.777Z",
        "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
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      },
      "references": [
        {
          "name": "https://github.com/mtzanidakis/praktor/security/advisories/GHSA-48v2-6jcm-fc99",
          "tags": [
            "x_refsource_CONFIRM"
          ],
          "url": "https://github.com/mtzanidakis/praktor/security/advisories/GHSA-48v2-6jcm-fc99"
        },
        {
          "name": "https://github.com/mtzanidakis/praktor/pull/228",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/mtzanidakis/praktor/pull/228"
        },
        {
          "name": "https://github.com/mtzanidakis/praktor/commit/c3731eeda01c0b3ec1dbd13cccd5a147c3182141",
          "tags": [
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          ],
          "url": "https://github.com/mtzanidakis/praktor/commit/c3731eeda01c0b3ec1dbd13cccd5a147c3182141"
        },
        {
          "name": "https://github.com/mtzanidakis/praktor/releases/tag/v0.9.1",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/mtzanidakis/praktor/releases/tag/v0.9.1"
        }
      ],
      "source": {
        "advisory": "GHSA-48v2-6jcm-fc99",
        "discovery": "UNKNOWN"
      },
      "title": "praktor: Telegram upload traversal permits persistent agent instruction injection"
    }
  },
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    "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
    "assignerShortName": "GitHub_M",
    "cveId": "CVE-2026-62331",
    "datePublished": "2026-10-30T19:00:25.777Z",
    "dateReserved": "2026-07-13T21:42:50.094Z",
    "dateUpdated": "2026-10-30T19:46:25.082Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

CVE-2026-62331 (GCVE-0-2026-62331)

Vulnerability from cvelistv5 – Published: 2026-10-30 19:00 – Updated: 2026-10-30 19:46

Title

praktor: Telegram upload traversal permits persistent agent instruction injection

Summary

praktor is a multi-agent Claude Code orchestrator with Telegram input and output, Docker isolation, and a Mission Control UI. Prior to 0.9.1, both Telegram upload sites in `internal/telegram/bot.go` concatenate the attacker-controlled document filename into a destination path without sanitization, and `path.Join` collapses parent-directory traversal. A remote Telegram user who can message the bot can therefore write outside `uploads/` within the persistent agent workspace mounted at `/workspace/agent`. Because `allow_from: []` permits all senders by default, no prior authentication or privilege is required in that configuration. The attacker can plant or overwrite `CLAUDE.md`, instruction, skill, hook, or configuration files that the Claude agent reads and operates on across later runs, turning a document upload into stored instruction injection. The demonstrated arbitrary-write scope is the persistent agent workspace volume, not an unrestricted host-filesystem write. This issue is fixed in version 0.9.1.

Severity

8.2 (High)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:N

SSVC

Exploitation: none Automatable: yes Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-10-30 19:45 UTC

CWE

CWE-22 - Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')

Assigner

GitHub_M CNA under the mitre root

CNA scorecard C 72/100 over 7886 records in the last 180 days details

References

4 references

URL	Tags
https://github.com/mtzanidakis/praktor/security/a…	x_refsource_CONFIRM
https://github.com/mtzanidakis/praktor/pull/228	x_refsource_MISC
https://github.com/mtzanidakis/praktor/commit/c37…	x_refsource_MISC
https://github.com/mtzanidakis/praktor/releases/t…	x_refsource_MISC

Impacted products

1 product

Vendor	Product	Version
mtzanidakis	praktor	Affected: < 0.9.1

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-62331",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "yes"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-10-30T19:45:09.898798Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-10-30T19:46:25.082Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "praktor",
          "vendor": "mtzanidakis",
          "versions": [
            {
              "status": "affected",
              "version": "\u003c 0.9.1"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "praktor is a multi-agent Claude Code orchestrator with Telegram input and output, Docker isolation, and a Mission Control UI. Prior to 0.9.1, both Telegram upload sites in `internal/telegram/bot.go` concatenate the attacker-controlled document filename into a destination path without sanitization, and `path.Join` collapses parent-directory traversal. A remote Telegram user who can message the bot can therefore write outside `uploads/` within the persistent agent workspace mounted at `/workspace/agent`. Because `allow_from: []` permits all senders by default, no prior authentication or privilege is required in that configuration. The attacker can plant or overwrite `CLAUDE.md`, instruction, skill, hook, or configuration files that the Claude agent reads and operates on across later runs, turning a document upload into stored instruction injection. The demonstrated arbitrary-write scope is the persistent agent workspace volume, not an unrestricted host-filesystem write. This issue is fixed in version 0.9.1."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "NONE",
            "baseScore": 8.2,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "LOW",
            "integrityImpact": "HIGH",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:N",
            "version": "3.1"
          }
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          "descriptions": [
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              "cweId": "CWE-22",
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              "lang": "en",
              "type": "CWE"
            }
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      ],
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        "dateUpdated": "2026-10-30T19:00:25.777Z",
        "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
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      },
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        {
          "name": "https://github.com/mtzanidakis/praktor/security/advisories/GHSA-48v2-6jcm-fc99",
          "tags": [
            "x_refsource_CONFIRM"
          ],
          "url": "https://github.com/mtzanidakis/praktor/security/advisories/GHSA-48v2-6jcm-fc99"
        },
        {
          "name": "https://github.com/mtzanidakis/praktor/pull/228",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/mtzanidakis/praktor/pull/228"
        },
        {
          "name": "https://github.com/mtzanidakis/praktor/commit/c3731eeda01c0b3ec1dbd13cccd5a147c3182141",
          "tags": [
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          "url": "https://github.com/mtzanidakis/praktor/commit/c3731eeda01c0b3ec1dbd13cccd5a147c3182141"
        },
        {
          "name": "https://github.com/mtzanidakis/praktor/releases/tag/v0.9.1",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/mtzanidakis/praktor/releases/tag/v0.9.1"
        }
      ],
      "source": {
        "advisory": "GHSA-48v2-6jcm-fc99",
        "discovery": "UNKNOWN"
      },
      "title": "praktor: Telegram upload traversal permits persistent agent instruction injection"
    }
  },
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    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
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}

Find a vulnerability

Search criteria

2 vulnerabilities by mtzanidakis

CVE-2026-62331 (GCVE-0-2026-62331)

CVE-2026-62331 (GCVE-0-2026-62331)