NIST deprecates RSA-2048 from 2030. Find every one of them before attackers do.
📦
📦 npm
Not in CISA KEV
HIGH severity

CVE-2026-25958 — @cubejs-backend/server-co…

HIGH

CVE-2026-25958 is a high-severity (CVSS 7.7) CWE-807 vulnerability in @cubejs-backend/server-core. A fix is available for @cubejs-backend/server-core — see the affected versions and patch details below.

Cube privilege escalation via a specially crafted request

Also known asGHSA-v226-32c7-x2v7
Published
Updated
Affected
3 pkgs
Patched
3 / 3
Exploits
None indexed
Exploitation data as of Nov 1, 2026 · OSV.dev, NVD, FIRST.org (EPSS)

Exploitation Status

No confirmed exploitation observed yet

  • CISA’s own triage has not observed active exploitation or public proof-of-concept code for this CVE as of its last assessment.

Exploitation and automatability from CISA’s SSVC triage for CVE-2026-25958.

EPSS Exploitation Probability

via FIRST.org ↗
0.4%probability of exploitation in next 30 days
Lower Risk-0.01%
Lower risk than most CVEs33th percentile — riskier than 33% of all scored CVEsHighest risk
0.00%0.30%0.60%0.90%0.0%0.4%May 26Aug 26Nov 26

Probability of exploitation in the next 30 days, from FIRST.org EPSS.

How urgent is this, really

Where this sits among everything scored

Real-World Exposure

3 pkgs affected

How broadly this vulnerability is actually deployed: weekly install volume shows current usage, and reverse-dependency count shows how many other packages break if it stays unpatched.

7other npm packages depend on this — each one inherits the vulnerability until it's patched upstream
@cubejs-backend/server-corenpm
84Kdownloads / week

Description

Impact

It is possible to make a specially crafted request with a valid API token that leads to privilege escalation.

Affected Versions:

≥= 0.27.19

Mitigation:

Upgrade to a patched version:

  • 1.5.13 and later (regular release)
  • 1.4.2 (active LTS release)
  • 1.0.14 (end-of-life LTS release)

References

The issue was reported by our Core engineer, Dmitrii Patsura (@ovr), in our internal Slack and was promptly patched in a recent update.

Affected Packages

3 total 3 fixed
EcosystemPackageVulnerable rangeFix
📦npm@cubejs-backend/server-core≥ 0.27.19&&< 1.0.141.0.14npm install @cubejs-backend/server-core@1.0.14
📦npm@cubejs-backend/server-core≥ 1.1.0&&< 1.4.21.4.2npm install @cubejs-backend/server-core@1.4.2
📦npm@cubejs-backend/server-core≥ 1.5.0&&< 1.5.131.5.13npm install @cubejs-backend/server-core@1.5.13

Affected Products

1 product · 3 configurations
Application
cube.jscube
≥ 1.5.0 && < 1.5.13
range

Detection & mitigation playbook

Open-source dependency

  1. Detect

    Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for @cubejs-backend/server-core, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.

  2. Fix

    Update @cubejs-backend/server-core to 1.0.14 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2026-25958 is resolved across your whole dependency graph.

  3. Workarounds

    Close the privilege gap rather than the entry point: audit which accounts, roles and service identities can reach the affected operation, drop the component to the least privilege it actually needs, and review file and directory permissions created by earlier installs — a default left in place is what makes this reachable.

Frequently Asked Questions

### **Impact** It is possible to make a specially crafted request with a valid API token that leads to privilege escalation. ### Affected Versions: `≥= 0.27.19` ### Mitigation: Upgrade to a patched version: - 1.5.13 and later (regular release) - 1.4.2 (active [LTS release](https://cube.dev/docs/product/administration/distribution#long-term-support)) - 1.0.14 (end-of-life LTS release) ### **References** The issue was reported by our Core engineer, Dmitrii Patsura (@ovr), in our internal Slack and was promptly patched in a recent update.
O3 Security · Impact-Aware SCA

Is CVE-2026-25958 in your dependencies?

Find it across npm, including transitive dependencies.

Scan my dependencies How O3 SCA works
CVE-2026-25958: @cubejs-backend/server — Fixed in 1.0.14