CVE-2026-90455 Dependency on vulnerable third-party component in Malcolm
A vulnerable HTTP library was reintroduced into Malcolm, though limited exploitability exists due to fixed trusted URLs and lack of attacker input processing.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-90455?
CVE-2026-90455 is a medium-severity vulnerability in CISA Malcolm, published on 11 Sep 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
A prior update that raised a bundled HTTP client library to a version remediating known vulnerabilities was later reverted, reintroducing the earlier, vulnerable version into a log-processing component. The only code path in that component using the library issues a request to a single fixed, trusted vendor URL at initialization and does not process attacker-controlled input through the library, limiting practical exploitability of the reintroduced version in this context.
Weakness: CWE-1395
Which versions are affected by CVE-2026-90455?
How do I fix CVE-2026-90455?
No fix has been published for CVE-2026-90455 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-90455 being exploited?
There is no known exploitation of CVE-2026-90455 in the wild and no public exploit code.
Sources
Also known as GHSA-wv2v-v3c6-8438.