CVE-2026-86544 json
knowns before 0.30.0 Authorization Bypass via Misclassified Code Actions
published 2mo ago modified last mo. also EUVD-2026-72562 , GHSA-w323-3wpx-f7g5
Unreviewed: the maintainers' own advisory
Published by the maintainers on their GitHub repository knowns-dev/knowns. GitHub has not reviewed it into the GitHub Advisory Database, so the affected packages and versions are the maintainers' word. Read the full advisory on GitHub.
- cvss
- 8.1
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.6%
- EPSS 0.6% chance of exploitation in 30 days, percentile 48%
- public exploits
- 0
- none known
Summary
knowns versions before 0.30.0 contain an authorization bypass vulnerability where mutating code actions are incorrectly classified as read-only operations. Attackers with read-restricted sessions can exploit code.replace to modify permission configurations and escalate privileges on subsequent calls.
Patch / fix
- npm knowns 0.30.0
- knowns-dev knowns 0.30.0
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Check with FencerCISA SSVC
- Exploitation
- none
- Automatable
- no
- Technical impact
- partial
- Assessed
- 2mo ago
Exploit prediction
0.59% chance of exploitation in the next 30 days, higher than 48% of all scored CVEs (FIRST EPSS, 2026-11-11).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 4.0 | 7.2 | CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:H/VA:H/SC:N/SI:N/SA:N |
| CNA | 3.1 | 8.1 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H |
| CNA | 4.0 | 7.2 | CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:H/VA:H/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 packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| npm | knowns | <=0.29.1 |
0.30.0 |
Affected products
- knowns-dev knowns
Classification
- Weakness
-
- CWE-863 Incorrect Authorization
References
-
github.com
/knowns-dev/knowns/commit/a2c98fc5c313463576c9348beeec6a74ddd7333b
patch
-
github.com
/knowns-dev/knowns/security/advisories/GHSA-w323-3wpx-f7g5
vendor-advisory, advisory
-
github.com
/knowns-dev/knowns/blob/v0.29.1/internal/permissions/registry.go#L99-L140
technical-description
-
github.com
/knowns-dev/knowns/blob/v0.29.1/internal/permissions/guard.go#L44-L60
technical-description
-
github.com
/knowns-dev/knowns/releases/tag/v0.30.0
release-notes
-
vulncheck.com
/advisories/knowns-before-0.30.0-authorization-bypass-via-misclassified-code-actions
third-party-advisory
Sources
- CVE List CVE-2026-86544
- NVD CVE-2026-86544
- Maintainer advisory GHSA-w323-3wpx-f7g5
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.
The maintainers of knowns-dev/knowns published their own advisory on GitHub. Reviewed sources take precedence over it.