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CVE-2026-48089 — Vulnerability in...

HIGH

DevGuard has improper authorization on public assets

Published June 11, 2026Updated July 15, 2026Source: osv

Summary

### Impact On a DevGuard API instance with one or more **public assets**, any authenticated user — including users from a different organization with no membership or role in the affected org/project — can create, update, reapply, and delete **VEX rules** on those public assets. The same flaw affects the other vulnerability-triage write endpoints exposed under a public asset, including: - VEX rule create / update / reapply / delete - Dependency-vuln event creation (accept / reject / mitigate decisions), batch event creation, vuln sync, and mitigation - License risk creation - External reference writes - Artifact creation and license refresh The attacker needs a valid account on the instance, but no membership in the victim organization, project, or asset is required. **Security impact** is primarily to **integrity** of the vulnerability picture of public assets: an attacker can mark CVEs as false-positive, silence vulnerabilities, attach misleading justifications, or delete legitimate triage rules — undermining the trustworthiness of every consumer of the affected asset's VEX/SBOM output. Because public assets are by definition consumed by third parties (downstream users, supply-chain consumers, the published vex.json/sbom.json), the blast radius extends to anyone relying on that data. Private assets are **not affected** by this advisory: the public-read exemption that enables the bypass does not apply to them, and access remains correctly gated by organization/project membership. The private setting is only relevant in DevGuard itself — there is no impact given when you have an open-source project on e.g. GitLab/GitHub and a private DevGuard asset connected. ### Patches Version `v1.4.2`contains a patch. Users should upgrade to the patched release as soon as it is available. ### Workarounds If developers cannot upgrade their applications immediately: - ** They should make affected assets non-public.** In the asset settings, switch visibility from public to private. This removes the public-read exemption in the access-control middleware and restores correct authorization on all write endpoints for that asset. Downstream consumers that previously relied on the public `vex.json` / `sbom.json` endpoints will need to be granted explicit access or must receive an exported file version until the patched release is deployed. ### Resources Fixed commit: https://github.com/l3montree-dev/devguard/commit/1be88ec1309a5dc0566e35a23bdc4ea3ecd11417 ### Credit DeevGuard thanks @philipflohr ([awesome-it.de](https://awesome-it.de/)) for finding and responsibly reporting this vulnerability!

Advisory Timeline

  • First published June 11, 2026 (123 days ago).
  • Last revised July 15, 2026 — 34 days after initial publication.

Remediation

Upgrade to the fixed version using your package manager.

Go
Update github.com/l3montree-dev/devguard to 1.4.2 or later
go get github.com/l3montree-dev/devguard@v1.4.2

After upgrading, run your dependency scanner again to confirm the vulnerability is resolved.

Affected Packages (1)

Affects 1 ecosystem: go (1).

PackageEcosystemAffectedFixed In
github.com/l3montree-dev/devguard
go
All versions1.4.2

Vulnerability Classification

Common Weakness Enumeration (CWE) identifiers for this vulnerability type.

  • CWE-285
    Improper AuthorizationMITRE
  • CWE-863
    Incorrect AuthorizationMITRE

CVSS Score Breakdown

What the CVSS (Common Vulnerability Scoring System) 9.2 score means for each attack dimension.

Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
—
Confidentiality
—
Integrity
—
Availability
—

CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:N/VI:H/VA:H/SC:N/SI:H/SA:N

Frequently Asked Questions

What is CVE-2026-48089?
DevGuard has improper authorization on public assets This vulnerability has been assigned a severity rating of HIGH (CVSS score: 9.2/10).
How do I check if my project is affected by CVE-2026-48089?
CVE-2026-48089 affects github.com/l3montree-dev/devguard. Use GeekWala's free vulnerability scanner to check your dependencies against CVE-2026-48089 and 200,000+ other known vulnerabilities.

Severity & Exploitability

CVSS Score
9.2

Exploitation is straightforward and causes maximum impact. Patch immediately.

Also Known As

GHSA-6p54-fw2f-q7gf
GO-2026-5183

Related CVEs

  • CVE-2026-42300
    CRITICAL

    DevGuard has an unauthenticated identity assertion via `X-Admin-Token` header

  • CVE-2026-107809
    HIGH

    Nginx-UI AuthRequired token cookie fallback enables CSRF against management APIs

  • CVE-2026-107813
    HIGH

    Nginx UI: Incomplete fix of CVE-2026-84315 - the api/cluster router was not - wrapped in RequireSecureSession, so those sensitive mutations run without OTP step-up

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