Skip to main content
HIGH

CVE-2026-63639

CVSS v3

8.8

HIGH

EPSS Score

1.2 %

exploit probability, as of 2026-10-19

CISA KEV

No

known exploited

Exploitation

—

SSVC status

Get an alert for each new CVE published for valkey.

Set up CVE WatchFree account · no credit card

Affected and fixed versions

Packages from OSV.dev and products from the vendors' CSAF advisories.

version not verifiedVersions not verified: read as OSV.dev and the vendors publish them, not checked against each vendor's release list.

Packages

  • valkeyBitnamiall versions · fixed in 7.2.14
  • valkeyAlmaLinux:10all versions · fixed in 8.0.11-1.el10_2and 1 other package
  • valkeyAlmaLinux:9all versions · fixed in 8.0.10-1.el9_8and 1 other package

Vendor advisories

  • CVE-2026-63639 Red Hat Product Security55 products fixed

    valkey: Valkey: Remote code execution via use-after-free in stream deserialization

  • RHSA-2026:68601 Red Hat Product Security17 products fixed

    Red Hat Security Advisory: valkey security update

  • RHSA-2026:64807 Red Hat Product Security17 products fixed

    Red Hat Security Advisory: valkey security, bug fix, and enhancement update

  • RHSA-2026:64796 Red Hat Product Security17 products fixed

    Red Hat Security Advisory: valkey security, bug fix, and enhancement update

  • RHSA-2026:61884 Red Hat Product Security13 products fixed

    Red Hat Security Advisory: Red Hat Hardened Images RPMs bug fix and enhancement update

Full record on NVD

Description

Valkey is a distributed key-value database. Prior to 7.2.14, 8.0.10, 8.1.9, 9.0.5, and 9.1.1, Valkey's RESTORE command accepts a malformed RDB stream payload that assigns one Pending Entry List NACK to multiple consumers during stream consumer-group deserialization, causing a use-after-free when one consumer is deleted while another still references the shared NACK and potentially allowing remote code execution. This issue is fixed in versions 7.2.14, 8.0.10, 8.1.9, 9.0.5, and 9.1.1.

Technical details

CVSS v3 Vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Published
2026-08-18
Last Modified
2026-08-19

Frequently asked questions

What is CVE-2026-63639?

Valkey is a distributed key-value database. Prior to 7.2.14, 8.0.10, 8.1.9, 9.0.5, and 9.1.1, Valkey's RESTORE command accepts a malformed RDB stream payload that assigns one Pending Entry List NACK to multiple consumers during stream consumer-group deserialization, causing a use-after-free when one consumer is deleted while another still references the shared NACK and potentially allowing remote code execution. This issue is fixed in versions 7.2.14, 8.0.10, 8.1.9, 9.0.5, and 9.1.1.

Is CVE-2026-63639 actively exploited?

Active exploitation of CVE-2026-63639 has not been confirmed. Its EPSS score was 1.2% on 2026-10-19, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2026-63639?

CVE-2026-63639 has a CVSS v3 base score of 8.8 (HIGH severity), with vector string CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.

Running valkey? Hear about its next vulnerability

CVE Watch matches each new CVE to the vendors and products you list (vendor and product, not the version) and puts it in your alerts with its KEV and EPSS status.

Get alerts for this productCISA KEV additions, October 2026Search CVEs

Already have an account? Open CVE WatchNo credit card required · No monthly cap on website lookups · 250 API requests/month

Go further

Related vulnerabilities

Same product first, then the same vendor advisory and the same publication week.

Back to CVE Database