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Fencer Vulns
high 7.5

CVE-2026-5807 json

Vault Vulnerable to Denial-of-Service via Unauthenticated Root Token Generation/Rekey Operations

published 2026-04-17 6 mo ago modified 2026-10-26 13 d ago also BIT-vault-2026-5807 , EUVD-2026-23362 , GHSA-88v5-9hxc-f85r , GO-2026-5247

cvss
7.5
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.7%
EPSS 0.7% chance of exploitation in 30 days, percentile 54%
public exploits
0
none known

Summary

Vault is vulnerable to a denial-of-service condition where an unauthenticated attacker can repeatedly initiate or cancel root token generation or rekey operations, occupying the single in-progress operation slot. This prevents legitimate operators from completing these workflows. This vulnerability, CVE-2026-5807, is fixed in Vault Community Edition 2.0.0 and Vault Enterprise 2.0.0.

Patch / fix

  • bitnami vault 2.0.0
  • HashiCorp Vault 2.0.0
  • HashiCorp Vault Enterprise 2.0.0.
  • govulncheck-vulndb openSUSE Leap 16.0 0.0.20260723T184607-160000.1.1
  • openbao openSUSE Tumbleweed 2.5.3-1.1

opensuse advisories openSUSE-SU-2026:21483-1openSUSE-SU-2026:10594-1

  • openbao Alpine 3.24, Alpine 3.23 2.5.4-r0

alpine advisories ALPINE-CVE-2026-5807

Alpine secdb © Alpine Linux, from https://secdb.alpinelinux.org via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2026-5807 updated cvss 7.5

Vault: Vault: Denial of Service via unauthenticated root token generation or rekey operations

  • Red Hat Openshift Data Foundation 4 mcg-cli-rhel9, mcg-rhel8-operator, mcg-rhel9-operator, odf4/mcg-cli-rhel9, odf4/mcg-rhel8-operator, odf4/mcg-rhel9-operator
    affected: workaround, no fix available
  • Red Hat OpenShift Container Platform 4 openshift4/ose-installer-rhel9, openshift4/ose-baremetal-installer-rhel9
    not affected: vulnerable code not present
  • Red Hat Openshift Data Foundation 4 cephcsi-rhel8, cephcsi-rhel9, ocs4/cephcsi-rhel8, odf4/cephcsi-rhel8, odf4/cephcsi-rhel9
    not affected: vulnerable code not in execute path

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation
none
Automatable
yes
Technical impact
partial
Assessed
6 mo ago

Exploit prediction

0.72% chance of exploitation in the next 30 days, higher than 54% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CISA ADP 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
GitHub 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
OSV 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Affected packages

ecosystem package affected fixed in
go github.com/hashicorp/vault
<=1.21.4
all versions
 no fix listed
bitnami vault
>=0.10.0, <2.0.0
2.0.0

Affected products

  • HashiCorp Vault
  • HashiCorp Vault Enterprise
  • Red Hat Red Hat OpenShift Container Platform 4
  • Red Hat Red Hat Openshift Data Foundation 4

Classification

Weakness
  • CWE-770 Allocation of Resources Without Limits or Throttling

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

CPEs and fixed versions use Anchore's correction of NVD's data: Added CPE configurations because not yet analyzed by NVD.