CVE-2026-4525

HIGH
MEDIUM Priority: 0.04 BB Relevance: 68/100
Published: 2026-04-17 Modified: 2026-10-25 First seen: 2026-10-29 Status: active

Attack Surface

Network Low Complexity No Interaction Conf. Impact Integ. Impact

CVSS Vector Breakdown

AV: Network
AC: Low
PR: Low
UI: None
S: Unchanged
C: High
I: High
A: High

Description

If a Vault auth mount is configured to pass through the "Authorization" header, and the "Authorization" header is used to authenticate to Vault, Vault forwarded the Vault token to the auth plugin backend. Fixed in 2.0.0, 1.21.5, 1.20.10, and 1.19.16.

Weakness Classification (1)

Affected Software (2)

VendorProductVersion
hashicorp vault 0.11.2 – 1.19.16
hashicorp vault 0.11.2 – 2.0.0

Bug Bounty Relevance

68 / 100
✓ Network accessible
✓ Low complexity
✓ No user interaction

CVSS Score

8.8 / 10.0 v3.1
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

EPSS — Exploitation Probability

0.41%
Raw Score 0.004060
Percentile 34.8%
Date 2026-10-29

EPSS Trend

2026-10-29
0.00406
2026-10-28
0.00406

Intelligence Sources

nvd ref →