CVE-2026-27623
CVE-2026-27623 · Valkey has Pre-Authentication DOS from malformed RESP request
This page contains facts from public vulnerability sources. Check the original advisory before updating.
Valkey is a distributed key-value database. Starting in version 9.0.0 and prior to version 9.0.3, a malicious actor with network access to Valkey can cause the system to abort by triggering an assertion. When processing incoming requests, the Valkey system does not properly reset the networking state after processing an empty request. A malicious actor can then send a request that the server incorrectly identifies as breaking server side invariants, which results in the server shutting down. Version 9.0.3 fixes the issue. As an additional mitigation, properly isolate Valkey deployments so that only trusted users have access.
CVSS 7.5 · High · EPSS 0.7%
- Published
- Updated
Stack: database
Affected products and versions
valkey
- Versions
- >= 9.0.0, < 9.0.3: Affected
No fix published
Original sources
- https://github.com/valkey-io/valkey/security/advisories/GHSA-93p9-5vc7-8wgr
- https://access.redhat.com/security/cve/CVE-2026-27623
- https://bugzilla.redhat.com/show_bug.cgi?id=2442021
- https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-27623.json
- https://nvd.nist.gov/vuln/detail/CVE-2026-27623