CVE-2026-48034: HULUMI-H5 bypass via decoy sibling resources targeting a different bucket

Severity: high (CVSS 8.5 v4.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.4% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-07-24 · updated 2026-10-24
Weakness: CWE-284

Description

Hulumi is an open-source toolkit that ships secure-by-default cloud and platform infrastructure components for Pulumi. Prior to version 1.4.0, there is a bypass via decoy sibling resources targeting a different bucket. This issue has been patched in version 1.4.0.

Affected products

kerberosmansour hulumi: before 1.4.0

References

https://github.com/kerberosmansour/hulumi/pull/175
https://github.com/kerberosmansour/hulumi/pull/178
https://github.com/kerberosmansour/hulumi/releases/tag/v1.4.0
https://github.com/kerberosmansour/hulumi/security/advisories/GHSA-9vc9-4jv3-rf86

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