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CVE-2026-27623

28
FAUCET Score

CVE-2026-27623 describes a denial-of-service vulnerability in Valkey, a distributed key-value database, affecting versions 9.0.0 through 9.0.2. A remote unauthenticated attacker can trigger an assertion failure, causing the Valkey server to shut down, by sending a specially crafted sequence of requests that exploit improper network state resetting. This vulnerability has a CVSS score of 7.5 (High), indicating a high impact on availability with low attack complexity and no user interaction required. There is currently no public exploit code available, nor is it known to be actively exploited, with minimal community discussion and no media coverage.

Impacted Technologies

VendorProductVersion(s)CPE
>= 9.0.0, < 9.0.3CPE matchmatch criteria
cpe:2.3:a:lfprojects:valkey:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

7.5HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
3.6
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.35%
Probability of exploitation in next 30 days
EPSS Percentile
27.9%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0035 is in the 9th percentile among its peer group of 51,485 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Vendor Patches (2)

github_advisoryvendor investigatingvia nvd_reference
View patch
redhatno patchvia redhat_api
Product: Red Hat Enterprise Linux 10Fixed in: valkey

Vendor Advisories (2)

redhatCVE-2026-27623Important

Valkey: Valkey: Denial of Service via specially crafted network requests

Feb 23, 2026
microsoft2026-Feb/CVE-2026-27623Important

Valkey has Pre-Authentication DOS from malformed RESP request

Feb 10, 2026

References

access.redhat.com / security/cve/CVE-2026-27623
bugzilla.redhat.com / show_bug.cgi
security.access.redhat.com / data/csaf/v2/vex/2026/cve-2026-27623.json
github.com / valkey-io/valkey/security/advisories/GHSA-93p9-5vc7-8wgr
Vendor Advisory