What’s Vulnerable › Vulnerabilities

CVE-2026-115321: Bytebase before 3.16.0 Authorization Bypass via UpdateIssueComment

• Severity: medium (CVSS 4.3 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.3% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-10-22 · updated 2026-10-23
• Weakness: CWE-639

Description

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.

Affected products

• bytebase: before 3.16.0 — fixed in 3.16.0

How to fix

Upgrade to a fixed version: bytebase 3.16.0. Check the vendor advisory for mitigations.

References

• 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

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