VULNpocalypse

CVE-2026-58658: GPUStack Unauthenticated Information Disclosure via Worker Endpoints

Advisory generated from the CVE record, CISA, Exploit Observer and VEDAS: what it is, whether it is exploited, who is affected, and how to fix and detect it.

Generated by VEDAS. Scores as of 2026-11-04 15:41 UTC. Rebuilt every few hours from cve-scores, CISA KEV and vedas-signatures. How this works and its limits.

What it is

GPUStack through 2.2.1, fixed in commit 4e20551, contains an unauthenticated information disclosure vulnerability that allows unauthenticated attackers to access sensitive inference logs and modify worker configuration by exploiting unprotected /serveLogs and /debug endpoints on the worker port. Attackers can enumerate model instance IDs to stream serving logs containing prompts and completions, change log levels, and read memory profiling data without any authentication.

Description quoted from the CVE record (assigned by VulnCheck, published 2026-07-15).

Weakness: Missing Authentication for Critical Function

How it can be exploited

Exploitable over the network with low attack complexity with no special attack requirements needing no privileges and no user interaction. Impact: confidentiality high, integrity low, availability none. CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:L/VA:N/SC:N/SI:N/SA:N

CISA assessment (SSVC): CISA assesses that a public proof of concept exists. Automatable: yes. Technical impact: partial.

Public exploit evidence (Exploit Observer)

Exploit Observer found 5 code repositories naming this CVE.

Code repositories that name a CVE are often scanners, copies or fakes, and some are malware. Read the code before running anything.

See all 8 references on Exploit Observer

Live scores

EPSS
0.005
low predicted chance of attack
VEDAS
0.990
strong exploit evidence
On CISA KEV
Not listed
Detection rule
Nuclei · Suricata

Who is affected

ProductAffectedNot affected
gpustackup to and including 2.2.14e20551b5aaf is not affected

Version ranges exactly as the CVE record states them. “Before X” means X is the first fixed version.

How to fix it

Vendor guidance:

How to detect it

Nuclei template (active check)

GPUStack - Unauthenticated Worker Log Disclosure

GPUStack through 2.2.1 exposes unprotected log and debug endpoints on the worker port (default 10150, bound to 0.0.0.0). An unauthenticated attacker can reach the worker serveLogOptions and serveLogs endpoints to enumerate model instance restarts and stream serving logs containing prompts and completions, and can change log levels via the debug endpoints. This template confirms the flaw non-destructively by reading the unauthenticated serveLogOptions endpoint on the worker.

Name and description quoted from the template, written by VEDAS.

The template sends 1 request (GET /serveLogOptions/1); it decides using status, word matchers. Severity in the template: high. Marked as not yet verified against a live vulnerable target.

Run it against a host you own or are authorised to test:

bash
nuclei -u https://your-host -t CVE-2026-58658.yaml
Show the template (45 lines)
yaml
id: CVE-2026-58658

info:
  name: "GPUStack - Unauthenticated Worker Log Disclosure"
  author: vedas-arpsyndicate
  severity: high
  description: |
    GPUStack through 2.2.1 exposes unprotected log and debug endpoints on the worker port
    (default 10150, bound to 0.0.0.0). An unauthenticated attacker can reach the worker
    serveLogOptions and serveLogs endpoints to enumerate model instance restarts and stream
    serving logs containing prompts and completions, and can change log levels via the debug
    endpoints. This template confirms the flaw non-destructively by reading the unauthenticated
    serveLogOptions endpoint on the worker.
  reference:
    - https://www.exploit.observer/?keyword=CVE-2026-58658&match=exact
    - https://subdomain.center/?engine=ammonites&keyword=gpustack&match=exact
  classification:
    cvss-metrics: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:L/VA:N/SC:N/SI:N/SA:N
    cvss-score: 8.7
    cve-id: CVE-2026-58658
    cwe-id: CWE-306
  metadata:
    verified: false
    max-request: 1
  tags: cve,cve2026,gpustack,missing-auth,unauth

http:
  - method: GET
    path:
      - "{{BaseURL}}/serveLogOptions/1"
    headers:
      Accept: application/json
    matchers-condition: and
    matchers:
      - type: word
        part: body
        words:
          - '"restarts"'
      - type: word
        part: header
        words:
          - "application/json"
      - type: status
        status:
          - 200

CVE-2026-58658.yaml on GitHub

Suricata rules (network detection)

1 rule that alert on traffic matching this exploit: VEDAS CVE-2026-58658 GPUStack - Unauthenticated Worker Log Disclosure Attempt. Add them to your Suricata rule set and reload.

Show the rules
suricata
alert http $EXTERNAL_NET any -> $HTTP_SERVERS $HTTP_PORTS (msg:"VEDAS CVE-2026-58658 GPUStack - Unauthenticated Worker Log Disclosure Attempt"; flow:established,to_server; http.method; content:"GET"; http.uri; content:"/serveLog"; fast_pattern; nocase; classtype:web-application-attack; reference:cve,CVE-2026-58658; reference:url,https://www.exploit.observer/?keyword=CVE-2026-58658&match=exact; reference:url,https://subdomain.center/?engine=ammonites&keyword=gpustack&match=exact; sid:1081606; rev:1;)

CVE-2026-58658.rules on GitHub

References

Vendor advisories and patches

Exploit code

Technical analysis and advisories

Other databases

Where this comes from

This advisory is generated automatically by VEDAS from: CVE.org record, cve-scores (EPSS and VEDAS), Exploit Observer, vedas-signatures. Text in quotes is reproduced from the source; everything else is a fixed template filled with source fields. Nothing here is written by a language model. Check the vendor advisory before acting, and read how VEDAS and Exploit Observer work, and their limits.

Supporting partners

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