CVE-2026-85649

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-85649
StatePUBLISHED
AssignerCIRCL
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-09-04 13:20:11 UTC
Updated2026-09-04 18:18:05 UTC
Description(Holloway) Chew, Kean Ho's Actualizer v1.2.0 and earlier contains a fail-open password validation vulnerability in the Alpha user and root user password loops of Shell/debian-minbase-install.sh. The installer invokes mkpasswd to generate yescrypt password hashes but does not check the command's return value and unconditionally accepts the result. If mkpasswd fails to generate a yescrypt hash, for example because an incompatible mkpasswd implementation or an environment without yescrypt support is used, the resulting password hash variable can be empty and the build proceeds. The resulting image can therefore contain empty password fields for the root and alpha accounts, potentially permitting passwordless authentication depending on the authentication configuration.

Risk And Classification

Primary CVSS: v3.1 7.9 HIGH from 5a6e4751-2f3f-4070-9419-94fb35b644e8

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

EPSS: 0.002070000 probability, percentile 0.108330000 (date 2026-09-07)

Problem Types: CWE-252 | CWE-636 | CWE-636 CWE-636: Not Failing Securely (Failing Open) | CWE-252 CWE-252: Unchecked Return Value

VersionSourceTypeScoreSeverityVector
3.15a6e4751-2f3f-4070-9419-94fb35b644e8Secondary7.9HIGHCVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:N
3.1CNACVSS7.9HIGHCVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:N

CVSS v3.1 Breakdown

Attack Vector
Local
Attack Complexity
Low
Privileges Required
High
User Interaction
None
Scope
Changed
Confidentiality
High
Integrity
High
Availability
None

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

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Chewkeanho Software-actualizer affected 1.2.0 semver Not specified

References

ReferenceSourceLinkTags
doi.org/10.5281/zenodo.22169659 5a6e4751-2f3f-4070-9419-94fb35b644e8 doi.org
github.com/ChewKeanHo/software-actualizer/blob/v1.2.0/Shell/debian-minba... 5a6e4751-2f3f-4070-9419-94fb35b644e8 github.com
github.com/ChewKeanHo/software-actualizer/commit/50a0932ac705635d9af6295... 5a6e4751-2f3f-4070-9419-94fb35b644e8 github.com
github.com/ChewKeanHo/software-actualizer/releases/tag/v1.2.1 5a6e4751-2f3f-4070-9419-94fb35b644e8 github.com
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

Vendor Comments And Credit

Discovery Credit

CNA: Alice Xiang Yu Xuan (湘渝萱) (en)

CNA: (Holloway) Chew, Kean Ho (en)

Additional Advisory Data

Solutions

CNA: Upgrade to Actualizer v1.2.1 or later. The fixed version validates that the generated password hash has the expected yescrypt prefix and performs a pre-flight check for yescrypt support before building.

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