Vulnerability · Published Jul 24, 2026 · Assigned by GitHub_M
CVE-2026-48034HULUMI-H5 bypass via decoy sibling resources targeting a different bucket
High 8.5
In plain English
A high-severity improper access control in hulumi from kerberosmansour. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 39% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Severity (CVSS 4.0)8.5High
Exploit odds (30 days)0.4%top 60.8% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official 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 packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| npm | @hulumi/policies | 1.4.0 | GHSA-9vc9-4jv3-rf86 |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| kerberosmansour | hulumi | < 1.4.0 |
Weakness: CWE-284 · Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:H/VA:N/SC:H/SI:H/SA:L
References
- https://github.com/kerberosmansour/hulumi/security/advisories/GHSA-9vc9-4jv3-rf86 x_refsource_CONFIRM
- https://github.com/kerberosmansour/hulumi/pull/175 x_refsource_MISC
- https://github.com/kerberosmansour/hulumi/pull/178 x_refsource_MISC
- https://github.com/kerberosmansour/hulumi/releases/tag/v1.4.0 x_refsource_MISC