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VulnerabilityPublished

CVE-2025-6011: HashiCorp Vault · Observable Discrepancy

Affects HashiCorp VaultSource CVE Database V5

0

Not known to be exploited · CVSS 3.7 Low : upgrade to 1.20.1 when convenient.

Data as of 26 Oct 2026, 17:16 UTC

CVSS 3.1 base score
3.7Low
How severe the flaw is on the 0–10 CVSS scale.
EPSS
0.3% chance of exploitation in 30 days – higher than 29% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Patch
Available – fixed in 1.20.1
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 1 Aug 2025

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponised: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq Mirage: no evidence on record.

    No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 26 Oct 2026.

What to do

Upgrade HashiCorp Vault to 1.20.1.

Affected software

ProductAffectedFixed in
HashiCorp VaultAffected
  • <1.20.1
Fixed in
  • 1.20.1

AI-suggested

Apply the official patches provided by HashiCorp: upgrade to Vault Community Edition 1.20.1 or Vault Enterprise 1.20.1, 1.19.7, 1.18.12, or 1.16.23. These versions contain fixes that eliminate the timing side channel vulnerability. No additional mitigation steps are indicated by the vendor advisory.

Description

CVE-2025-6011 is a timing side channel vulnerability in HashiCorp Vault's userpass authentication method that allows an attacker to distinguish between existing and non-existing usernames. This could enable username enumeration. The issue is fixed in Vault Community Edition 1.20.1 and Vault Enterprise versions 1.20.1, 1.19.7, 1.18.12, and 1.16.23. The vulnerability has a low severity score of 3.7 and does not impact confidentiality, integrity, or availability beyond username disclosure.

References

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