CVE-2026-115321 json
Bytebase before 3.16.0 Authorization Bypass via UpdateIssueComment
published 18d ago modified 17d ago also EUVD-2026-108123
- cvss
- 4.3
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.3%
- EPSS 0.3% chance of exploitation in 30 days, percentile 21%
- public exploits
- 0
- none known
Summary
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.
Patch / fix
- bytebase bytebase 3.16.0
- github.com/bytebase/bytebase@270e255 commit
- github.com/bytebase/bytebase#19552 pull request
- github.com/bytebase/bytebase/releases/tag/3.16.0 release
Is CVE-2026-115321 in your stack? Fencer shows which of your repositories are affected as soon as an advisory lands, and opens the fix as a pull request.
Check with FencerCISA SSVC
- Exploitation
- none
- Automatable
- no
- Technical impact
- partial
- Assessed
- 17d ago
Exploit prediction
0.28% chance of exploitation in the next 30 days, higher than 21% of all scored CVEs (FIRST EPSS, 2026-11-09).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 4.0 | 5.3 | CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N |
| CNA | 3.1 | 4.3 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N |
| CNA | 4.0 | 5.3 | CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X |
Affected products
- bytebase bytebase
Classification
- Weakness
-
- CWE-639 Authorization Bypass Through User-Controlled Key
References
-
github.com
/bytebase/bytebase/pull/19552
patch, issue-tracking
-
github.com
/bytebase/bytebase/commit/270e25529731b59988b58f4a4b3bda431c748bc9
patch
-
github.com
/bytebase/bytebase/issues/19369
issue-tracking
-
github.com
/bytebase/bytebase/releases/tag/3.16.0
release-notes
-
github.com
/bytebase/bytebase/blob/3.15.1/backend/api/v1/issue_service.go#L1116
technical-description
-
github.com
/bytebase/bytebase
product
-
vulncheck.com
/advisories/bytebase-before-3.16.0-authorization-bypass-via-updateissuecomment
third-party-advisory
Sources
- CVE List CVE-2026-115321
- NVD CVE-2026-115321
Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.
CPEs and fixed versions use Anchore's correction of NVD's data: Added CPE configurations because not yet analyzed by NVD.