[UPDATE] [medium] Keycloak (netty-codec-http): Vulnerability allows file manipulation
A remote, anonymous attacker can exploit a vulnerability in Keycloak to manipulate files.
CSIRTS triage
- What
- A remote, anonymous attacker can exploit a vulnerability in Keycloak to manipulate files.
- Who is affected
- Deployments of Keycloak are affected by this vulnerability.
- Urgency
- Remediation is important as it allows file manipulation by anonymous attackers, though exploitation is not currently reported.
- Action
- Update Keycloak to the latest version to mitigate the vulnerability.
AI-assisted analysis generated from the source advisory — verify against the original.
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Details
Original advisory: https://wid.cert-bund.de/portal/wid/securityadvisory?name=WID-SEC-2026-0212
Exploitation outlook
EPSS (FIRST.org) estimates each CVE’s probability of exploitation in the next 30 days — here is the CSIRTS.com read on those numbers.
- Low exploitation riskCVE-2025-677350.30% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 22% of all scored CVEs.
Referenced CVEs
| CVE | CSIRTS overview | External |
|---|---|---|
| CVE-2025-67735 | coverage & exploitation status | NVD · CVE.org |
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