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TI-2026-79258 Aliases CVE-2026-115321GHSA-27j2-crf8-3w95

Authorization bypass in Bytebase lets users overwrite other projects' comments

Priority LOW 24CWE-639Published · Updated

Key facts

Attack vector
Network
Privileges required
Low
User interaction
None
Attack complexity
Low
Attack requirements
None
Impact type
Security bypass
Confidentiality · integrity · availability
None · Low · None
Fix status
Fixed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-639.

Summary

Bytebase before 3.16.0 contains an authorization bypass in the UpdateIssueComment handler, tracked as CWE-639. A low-privileged project user, including one with the Project Viewer role, can supply a comment UID from another project and overwrite comments they cannot access.

Written with Claude Haiku 5.5 from the sources below · 2026-10-28

Description from the CNA

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00284 21st percentileScored 2026-11-07
Fix Fixed bytebase (bytebase): 3.16.0

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
bytebasebytebasebefore 3.16.03.16.0Patch availableCNA
  • bytebase Vendorbytebase Affected before 3.16.0 Fixed in 3.16.0 Patch available CNA

Remediation

Upgrade Bytebase to version 3.16.0 or later, which fixes the issue.

Written with Claude Haiku 5.5 from the sources below · 2026-10-28

  • Fix · CNA bytebase (bytebase) Fixed in 3.16.0

Fixed in the same release

Records fixed by the same vendor advisory or release, as the CNA lists them.

  • Release ·

    bytebase 3.16.0

    2 records Highest priority Priority LOW 2 LOW

    Other records, highest priority first

    • TI-2026-79259 Authorization bypass in Bytebase exposes other projects' task runsPriority LOW 24
    Show all 2 records →

Timeline

  1. 2026-10-22 Threatist record created from CVE-2026-115321
  2. 2026-10-22 Alias added: GHSA-27j2-crf8-3w95
  3. 2026-10-23 CISA SSVC decision points changed

References

Patch 2

Other 4

  • TI-2026-44186 DBHub HTTP transport DNS rebinding allows unauthenticated browser-origin SQL execution CVSS 4.0CRITICAL 9.3
  • TI-2026-44228 @bytebase/dbhub's read-only mode does not prevent database writes CVSS 3.1HIGH 7.4
  • TI-2026-83204 Read-only bypass in DBHub MySQL and MariaDB connectors via comments CVSS 4.0MEDIUM 6.1
  • TI-2022-13896 bytebase - Improper Authorization CVSS 3.1MEDIUM 4.3
  • TI-2022-13895 bytebase - Improper Authorization CVSS 3.1MEDIUM 4.3
  • TI-2022-26714 Authentication bypass in Bytebase GitLab self-hosted login CVSS 4.0CRITICAL 9.3
See all 7 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences