What’s Vulnerable › Vulnerabilities

CVE-2026-109431: Camunda Missing Authorization in Task Sub-Resources

• Severity: high (CVSS 8.1 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.4% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-10-19 · updated 2026-10-27
• Weakness: CWE-639

Description

Camunda 7.24.0 before 7.24.14 and 7.23.0 before 7.23.17 contains a missing authorization check vulnerability in engine-rest task sub-resources that allows authenticated attackers with no permission grants to access task comments and attachments by calling singular read and delete endpoints that lack the authorization-filtered checks enforced on their corresponding list endpoints. Using only a known object ID, attackers can exploit TaskAttachmentResourceImpl and TaskCommentResourceImpl methods such as getAttachment, getAttachmentData, deleteAttachment, and getComment to read or download task attachments and comments and to permanently delete task attachments.

Affected products

• Camunda 7: from 7.24.0 before 7.24.14; from 7.23.0 before 7.23.17 — fixed in 7.24.14, 7.23.17

How to fix

Upgrade to a fixed version: Camunda 7 7.24.14, 7.23.17. Check the vendor advisory for mitigations.

References

• https://codeant.ai/security-research/camunda-task-attachment-authorization-cve-2026-109431
• https://docs.camunda.org/enterprise/download/
• https://www.vulncheck.com/advisories/camunda-missing-authorization-in-task-sub-resources

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