CVE-2026-90896: MarcosCamara01 Ecommerce 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

Missing Authentication for Critical Function (CWE-306) in the checkout session lookup handler (src/app/api/stripe/checkout_sessions/route.ts), exposed at GET /api/stripe/checkout_sessions, in MarcosCamara01 Ecommerce Template before commit 91e273c allows a remote, unauthenticated attacker holding a valid Stripe Checkout Session id (cs_...) to retrieve the full session object, including the buyer’s name, email, phone, billing address, amount paid and internal userId, because the GET handler calls stripe.checkout.sessions.retrieve() and returns the result without checking for an authenticated session or session ownership. Sibling endpoints such as POST /api/stripe/payment already enforced authentication via auth.api.getSession(); this endpoint had no access control whatsoever. The session_id is exposed in the buyer’s own browser URL after payment (success_url = /result?session_id={CHECKOUT_SESSION_ID}), so it leaks through Referer headers, analytics tools, server access logs and shared-machine browser history, resulting in disclosure of the buyer’s personal data to an unauthenticated actor.

Description quoted from the CVE record (assigned by Secur0, published 2026-09-14).

Weakness: CWE-306 Missing Authentication for Critical Function

How it can be exploited

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

CISA assessment (SSVC): CISA has no evidence of exploitation. Automatable: no. Technical impact: partial.

Public exploit evidence (Exploit Observer)

Also known as: EUVD-2026-78142, GHSA-qfqr-55gf-4v3j

VEDAS cluster: VEDAS:DEPRECATE

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-2026-78142
Vulnerability database or vendor advisory: https://github.com/advisories/GHSA-qfqr-55gf-4v3j
Vulnerability database or vendor advisory: https://nvd.nist.gov/vuln/detail/CVE-2026-90896

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: 0.007
low predicted chance of attack
VEDAS: 0.986
strong exploit evidence
On CISA KEV: Not listed
Detection rule: Nuclei · Suricata

Who is affected

Product	Affected	Not affected
MarcosCamara01 Ecommerce Template	before 91e273c	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: 91e273c.

Vendor guidance:

https://github.com/MarcosCamara01/ecommerce-template/commit/91e273c69d976a3d205179e66e01fc399bfdd08b (patch)

How to detect it

Nuclei template (active check)

MarcosCamara01 Ecommerce Template - Unauthenticated Stripe Checkout Session Disclosure
MarcosCamara01 Ecommerce Template before commit 91e273c exposes GET /api/stripe/checkout_sessions, whose handler calls stripe.checkout.sessions.retrieve() with a caller-supplied session_id and returns the result with no access control, while sibling endpoints enforce auth via auth.api.getSession(). A remote unauthenticated attacker holding a valid Checkout Session id can retrieve the buyer’s name, email, phone, billing address, amount paid and internal userId. The endpoint reaching Stripe for an arbitrary (even non-existent) session id without an auth gate confirms the exposure.

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

The template sends 1 request (GET /api/stripe/checkout_sessions?session_id=cs_test_{{randstr}}); it decides using dsl 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-2026-90896.yaml

Show the template (38 lines)

yaml

id: CVE-2026-90896

info:
  name: "MarcosCamara01 Ecommerce Template - Unauthenticated Stripe Checkout Session Disclosure"
  author: vedas-arpsyndicate
  severity: high
  description: |
    MarcosCamara01 Ecommerce Template before commit 91e273c exposes GET
    /api/stripe/checkout_sessions, whose handler calls stripe.checkout.sessions.retrieve()
    with a caller-supplied session_id and returns the result with no access control, while
    sibling endpoints enforce auth via auth.api.getSession(). A remote unauthenticated
    attacker holding a valid Checkout Session id can retrieve the buyer's name, email, phone,
    billing address, amount paid and internal userId. The endpoint reaching Stripe for an
    arbitrary (even non-existent) session id without an auth gate confirms the exposure.
  reference:
    - https://www.exploit.observer/?keyword=CVE-2026-90896&match=exact
    - https://subdomain.center/?engine=ammonites&keyword=ecommerce-template&match=exact
  classification:
    cvss-metrics: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
    cvss-score: 8.2
    cve-id: CVE-2026-90896
    cwe-id: CWE-306
  metadata:
    verified: false
  tags: cve,cve2026,ecommerce-template,stripe,exposure
http:
  - raw:
      - |
        GET /api/stripe/checkout_sessions?session_id=cs_test_{{randstr}} HTTP/1.1
        Host: {{Hostname}}
        Accept: application/json

    matchers:
      - type: dsl
        dsl:
          - 'status_code != 401 && status_code != 403 && status_code != 404'
          - 'contains(body, "No such checkout.session") || contains(body, "resource_missing")'
        condition: and

CVE-2026-90896.yaml on GitHub

Suricata rules (network detection)

1 rule that alert on traffic matching this exploit: VEDAS CVE-2026-90896 Ecommerce Template - Unauthenticated Stripe Checkout Session Access Attempt. Add them to your Suricata rule set and reload.

Show the rules

suricata

alert http $EXTERNAL_NET any -> $HOME_NET any (msg:"VEDAS CVE-2026-90896 Ecommerce Template - Unauthenticated Stripe Checkout Session Access Attempt"; flow:established,to_server; http.method; content:"GET"; http.uri; content:"/api/stripe/checkout_sessions"; nocase; fast_pattern; content:"session_id"; nocase; classtype:web-application-attack; reference:cve,CVE-2026-90896; reference:url,https://www.exploit.observer/?keyword=CVE-2026-90896&match=exact; reference:url,https://subdomain.center/?engine=ammonites&keyword=ecommerce-template&match=exact; sid:1081408; rev:1;)

CVE-2026-90896.rules on GitHub

References

Vendor advisories and patches

https://github.com/MarcosCamara01/ecommerce-template/commit/91e273c69d976a3d205179e66e01fc399bfdd08b (patch)

Exploits and technical analysis

https://secur0.com/en/cna/cve-list/cve-2026-90896-missing-authentication-ecommerce-template-checkout-session-pii (third-party-advisory, technical-description)

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.