CVE-2026-115321: bytebase bytebase

Bytebase before 3.16.0 Authorization Bypass via UpdateIssueComment

CVSS 5.3 MediumEPSS 0.0028 · 21st percentile

Published by the CVE Program (CNA: VulnCheck) at 22 Oct 2026, 10:57 UTC. agentprime has not analysed this yet, so whether it affects any app is not known. This CVE names a vendor and product rather than a package, so the lockfile check doesn’t match it.

Affected products, as the CNA wrote them
Vendor	Product	Versions
bytebase	bytebase pkg:golang/github.com/bytebase/bytebase	affected before 3.16.0 semver unaffected 3.16.0 semver Other versions: unaffected

Identifiers

CVE-2026-115321

CNA

VulnCheck

Weakness (CWE)

CWE-639

Not analysed yet

We haven’t published our own analysis of this CVE. If a person reviews it, this page will say what’s affected and what has to be true for it to matter.

Severity and exploitation

Score	Rating	CVSS	Vector	Source
5.3	Medium	4.0	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 (VulnCheck)Used for this record
4.3	Medium	3.1	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N	CNA (VulnCheck)

CISA KEV Not listed.
EPSS 0.0028, the 21st percentile, on 10 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

This record came from the full history of the CVE Program, published 22 Oct 2026. New records show when each source confirmed them.

Sources

References from the CNA

github.com/bytebase/bytebase/issues/19369 issue-tracking
github.com/bytebase/bytebase/pull/19552 patchissue-tracking
github.com/bytebase/bytebase/commit/270e25529731b59988b58f4a4b3bda431c748bc9 patch
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
www.vulncheck.com/advisories/bytebase-before-3.16.0-authorization-bypass-via-updateissuecomment third-party-advisory

Facts on this page come from the CVE List as the CNA published them, with CVSS from the sources named above, CISA KEV and FIRST EPSS. Vendors, products and versions are shown as the CNA wrote them. We don’t reproduce the CVE’s description.