CVE-2026-40264

ℹ️ low

Summary

OpenBao is an open source identity-based secrets management system. OpenBao's namespaces provide multi-tenant separation. Prior to version 2.5.3, a tenant who leaks token accessors can have their token revoked or renewed by a privileged administrator in another tenant. This is addressed in v2.5.3.

CVSS Score

2.7

Low

EPSS Score

0.0

Exploit Probability

Published Date

2026-04-21

First Seen: 2026-04-22

📊 Relative Risk Intelligence

This CVE is Lower Risk - more severe than 1.6% of all 328,009 vulnerabilities in our database.

#322,897

Below average severity

Severity Percentile

🎯 CISA SSVC Assessment Updated: Apr 21, 2026

🔍 Exploitation Status

None

No known exploits

⚙️ Automatable

Requires human interaction

💥 Technical Impact

Partial

Limited system impact

SSVC data provided by CISA

Last Modified 2026-04-24

Source NVD 🔗

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

CVSS Vector 4.0

CVSS:4.0/AV:N/AC:L/AT:P/PR:H/UI:P/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

CWE IDs (Weakness Types)

CWE-1259

📦 Affected Products 1

Vendor	Product	Status	Affected Versions
openbao	openbao	Affected	< 2.5.3

🔗 References 1

https://github.com/openbao/openbao/security/advisori...

Vendor Advisory

🔗 Related CVEs 6

CVE ID	Severity	CVSS	EPSS	Summary	Published
CVE-2026-42186	⚠️ high	7.5	0.0	OpenBao is an open source identity-based secrets management system. Prior to 2.5.3, when OpenBao's initial namespace del...	2026-05-14
CVE-2026-39388	ℹ️ low	3.1	0.0	OpenBao is an open source identity-based secrets management system. Prior to version 2.5.3, OpenBao's Certificate authen...	2026-04-21
CVE-2026-39396	ℹ️ low	3.1	0.0	OpenBao is an open source identity-based secrets management system. Prior to version 2.5.3, `ExtractPluginFromImage()` i...	2026-04-21
CVE-2026-39946	🔶 medium	4.9	0.0	OpenBao is an open source identity-based secrets management system. Prior to version 2.5.3, when OpenBao revoked privile...	2026-04-21
CVE-2026-33757	⛔ critical	9.6	0.0	OpenBao is an open source identity-based secrets management system. Prior to version 2.5.2, OpenBao does not prompt for ...	2026-03-27
CVE-2026-33758	🔶 medium	6.1	0.1	OpenBao is an open source identity-based secrets management system. Prior to version 2.5.2, OpenBao installations that h...	2026-03-27

These CVEs affect the same products