---
id: CVE-2026-90448
title: >-
  A deployment mode intended to expose only read access to stored data proxies a
  set of application programming interface routes without restricting which
  request methods are allowed
summary: >-
  A deployment mode intended to expose only read access to stored data proxies a
  set of application programming interface routes without restricting which
  request methods are allowed. One such route accepts a request that creates or
  overwr…
severity: high
cvss: 7.1
cvssVector: 'CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N'
cwe:
  - CWE-862
vendor: CISA
product: Malcolm
affected:
  - Malcolm < v26.06.0
published: '2026-09-11'
updated: '2026-09-18'
sourceUpdated: '2026-09-18T19:39:09.490'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-90448'
references:
  - url: >-
      https://raw.githubusercontent.com/cisagov/CSAF/develop/csaf_files/OT/white/2026/icsa-26-254-01.json
    label: ics-cert@hq.dhs.gov
tags:
  - nvd
  - cve.org
epss: 0.00207
epssPercentile: 0.11128
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-09-14T16:12:33.273539Z'
cvssSource: cna
ingestedAt: '2026-09-14T11:11:19.875Z'
---

## Overview

A deployment mode intended to expose only read access to stored data proxies a set of application programming interface routes without restricting which request methods are allowed. One such route accepts a request that creates or overwrites a stored record, including an attacker-chosen identifier, using the application's own elevated backend credentials. This allows an authenticated user on a deployment intended to be read-only to forge or overwrite stored records that should not be modifiable in that deployment mode.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.