CVE-2026-115321

Bytebase before 3.16.0 contains an authorization bypass vulnerability in the UpdateIssueComment handler that allows low-privileged project users to modify comments in other projects by supplying a foreign comment UID. Attackers with any project role, including Project Viewer, can set their own project's issue as parent and reference another project's comment UID to overwrite comments they cannot access.

CVSS v3 4.3 MEDIUM

4.3^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 2.8 / Impact : 1.4

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact LOW

Availability Impact NONE

Scope UNCHANGED

References

Link	Resource
https://github.com/bytebase/bytebase
https://github.com/bytebase/bytebase/blob/3.15.1/backend/api/v1/issue_service.go#L1116
https://github.com/bytebase/bytebase/commit/270e25529731b59988b58f4a4b3bda431c748bc9
https://github.com/bytebase/bytebase/issues/19369
https://github.com/bytebase/bytebase/pull/19552
https://github.com/bytebase/bytebase/releases/tag/3.16.0
https://www.vulncheck.com/advisories/bytebase-before-3.16.0-authorization-bypass-via-updateissuecomment

Configurations

No configuration.

History

22 Oct 2026, 11:17

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-10-22 11:17

Updated : 2026-10-23 15:17

NVD link : CVE-2026-115321

Mitre link : CVE-2026-115321

CVE.ORG link : CVE-2026-115321

JSON object : View

Products Affected

No product.

CWE

CWE-639

Authorization Bypass Through User-Controlled Key

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