CVE-2026-90448
mediumpriority · track · 0OT risk · elevatedEPSS 0.002 · 8 %ileUSEPSS · scored 2026-10-27
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.
remediations
Vendor fix, mitigation, or workaround guidance, as published by each source.
A vendor fix is available.
- FixedMalcolmcisa_csaf_ot
The latest version of Malcolm (September 2026 or later) fixes these vulnerabilities. Affected users are encouraged to update their instance of Malcolm to the latest version.
cvss
Technical severity, 0–10. One row per scoring source.
base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · medium–high · 4.9–7.1
ssvc
A stakeholder decision — act, attend, or track — from exploitation and impact.
weaknesses
The CWE weakness classes this flaw belongs to.
affected products (1)
Products and version ranges known to be affected.
advisories (1)
Vendor and ecosystem advisories describing this.
- ICSA-26-254-01CISA Malcolm2026-09-11icsa · cisa_csaf_otUS
CISA recommends users take defensive measures to minimize the risk of exploitation of these vulnerabilities.
sources
Which sources assert this record, and when.
references (2) nvd
External citations — patches, advisories, analysis.
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