CVE-2026-62242: codecentric advisory

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.

What it is

Spring Boot Admin Server before 4.1.2 contains a server-side request forgery vulnerability that allows unauthenticated attackers to register instances with attacker-controlled healthUrl and managementUrl parameters without validation against private IP ranges or metadata endpoints. Attackers can force the server to make HTTP requests to arbitrary internal addresses and retrieve response bodies via the actuator proxy to exfiltrate cloud credentials.

Description quoted from the CVE record (assigned by VulnCheck, published 2026-07-13).

Weakness: Server-Side Request Forgery (SSRF)

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 none, integrity none, availability none. CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:N/SC:H/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)

Also known as: EUVD-2026-43556, GHSA-j4h2-3wwr-928r

VEDAS cluster: VEDAS:CRYSTALSQUID

Exploit Observer links 5 pieces of public exploit code or detection modules that name this CVE or one of its aliases.

Exploit code and modules (5)

Code that names this CVE. A repository can be a working exploit, a scanner, a fake or malware; read it before running anything.

Vulnerability databases and vendor advisories (3)

Catalogue entries, not exploit evidence.

Vulnerability database or vendor advisory: https://euvd.enisa.europa.eu/enisa/EUVD-2026-43556
Vulnerability database or vendor advisory: https://github.com/advisories/GHSA-j4h2-3wwr-928r
Vulnerability database or vendor advisory: https://nvd.nist.gov/vuln/detail/CVE-2026-62242

2 more references returned by Exploit Observer did not name this CVE or an alias, so they are left out.

VEDAS data as of 2026-11-01T17:12 UTC; fetched 2026-11-02.

Live scores

EPSS: 0.004
low predicted chance of attack
VEDAS: 0.989
strong exploit evidence
On CISA KEV: Not listed
Detection rule: Nuclei · Suricata

Who is affected

Product	Affected	Not affected
codecentric spring-boot-admin	before 4.1.2	Not stated

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

How to fix it

Fixed versions stated in the CVE record: 4.1.2.

Vendor guidance:

spring-boot-admin 4.1.2 Release Notes (release-notes, patch)
Pull Request (issue-tracking, patch)
Patch Commit (patch)

How to detect it

Nuclei template (active check)

Spring Boot Admin - Server-Side Request Forgery via Instance Registration
Spring Boot Admin Server before 4.1.2 allows unauthenticated attackers to register monitored instances with attacker-controlled healthUrl and managementUrl values through POST /instances without validating them against private IP ranges or metadata endpoints. The server then issues HTTP requests to these URLs while polling instance status, enabling server-side request forgery against internal addresses.

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

The template sends 1 request (POST /instances); it confirms through an out-of-band callback (interactsh), so the scanner must be able to receive it; it decides using 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-2026-62242.yaml

Show the template (39 lines)

yaml

id: CVE-2026-62242

info:
  name: "Spring Boot Admin - Server-Side Request Forgery via Instance Registration"
  author: vedas-arpsyndicate
  severity: high
  description: |
    Spring Boot Admin Server before 4.1.2 allows unauthenticated attackers to register
    monitored instances with attacker-controlled healthUrl and managementUrl values through
    POST /instances without validating them against private IP ranges or metadata endpoints.
    The server then issues HTTP requests to these URLs while polling instance status,
    enabling server-side request forgery against internal addresses.
  reference:
    - https://www.exploit.observer/?keyword=CVE-2026-62242&match=exact
    - https://subdomain.center/?engine=ammonites&keyword=spring-boot-admin&match=exact
  classification:
    cvss-metrics: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:N/SC:H/SI:N/SA:N
    cvss-score: 6.9
    cve-id: CVE-2026-62242
    cwe-id: CWE-918
  metadata:
    verified: false
    max-request: 1
  tags: cve,cve2026,spring-boot-admin,spring,ssrf,oast

http:
  - raw:
      - |
        POST /instances HTTP/1.1
        Host: {{Hostname}}
        Content-Type: application/json

        {"name":"vedas","healthUrl":"http://{{interactsh-url}}/health","managementUrl":"http://{{interactsh-url}}/actuator","serviceUrl":"http://{{interactsh-url}}/"}
    matchers-condition: and
    matchers:
      - type: word
        part: interactsh_protocol
        words:
          - "http"

CVE-2026-62242.yaml on GitHub

Suricata rules (network detection)

1 rule that alert on traffic matching this exploit: VEDAS CVE-2026-62242 Spring Boot Admin - Server-Side Request Forgery. 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-2026-62242 Spring Boot Admin - Server-Side Request Forgery"; flow:established,to_server; http.method; content:"POST"; http.uri; content:"/instances"; nocase; fast_pattern; http.request_body; content:"healthUrl"; nocase; content:"://"; distance:0; classtype:web-application-attack; reference:cve,CVE-2026-62242; reference:url,https://www.exploit.observer/?keyword=CVE-2026-62242&match=exact; reference:url,https://subdomain.center/?engine=ammonites&keyword=spring-boot-admin&match=exact; sid:1072202; rev:1;)

CVE-2026-62242.rules on GitHub

References

Vendor advisories and patches

spring-boot-admin 4.1.2 Release Notes (release-notes, patch)
Pull Request (issue-tracking, patch)
Patch Commit (patch)

Exploits and technical analysis

Researcher Disclosure (technical-description, exploit, issue-tracking)
https://www.vulncheck.com/advisories/spring-boot-admin-server-ssrf-via-unauthenticated-instance-registration (third-party-advisory)

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.