EUVD-2026-39982
GHSA-mh3f-459p-p84f
Severity by source
CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:P/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
Network-reachable but high complexity; PR:N per CVSS 4.0; C:L added to reflect VulDB Information Disclosure tag suggesting hash reversibility; I:L for integrity manipulation; no availability impact.
Primary rating from Vendor (VulDB).
CVSS VectorVendor: VulDB
CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:P/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
Lifecycle Timeline
3DescriptionCVE.org
A vulnerability was detected in skypilot-org skypilot up to 0.12.0. Impacted is the function username.encode of the file sky/users/server.py of the component User ID Handler. The manipulation results in use of weak hash. The attack may be performed from remote. This attack is characterized by high complexity. The exploitability is considered difficult. The exploit is now public and may be used. The vendor was contacted early about this disclosure.
AnalysisAI
Weak hash usage in SkyPilot's User ID Handler (versions up to 0.12.0) allows remote attackers with high-complexity access to manipulate user identity integrity by exploiting the username.encode function in sky/users/server.py. The vulnerability (CWE-328) results in a low-integrity impact on the vulnerable system, with no confidentiality or availability impact per the CVSS 4.0 vector, though the VulDB-assigned 'Information Disclosure' tag suggests the weak hash may additionally expose derivable username data. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | The attack requires high complexity (AC:H per CVSS 4.0), meaning specific preconditions or timing constraints must be met - the exact technical prerequisites are not enumerated in the available description beyond the requirement to target the `username.encode` function in the User ID Handler. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 4.0 score of 6.3 (AV:N/AC:H/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/E:P) reflects a moderate-severity issue constrained by high attack complexity (AC:H), which meaningfully reduces real-world exploitability. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | A remote attacker with the capability to interact with SkyPilot's user management interface could craft requests that exploit hash collisions or preimage weaknesses in the `username.encode` function to forge or predict valid user identifiers. If successful, the attacker could manipulate user identity resolution within the system, potentially causing requests to be attributed to a different user account and subverting access control or audit logging. … |
| Remediation | No vendor-released patched version has been independently confirmed from the available references at time of analysis. … Detailed patch versions, workarounds, and compensating controls in full report. |
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Same weakness CWE-328 – Use of Weak Hash
View allSame technique Information Disclosure
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External POC / Exploit Code
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