Advisory details:
pypa / nova/PYSEC-2026-2685
| Advisory ID | pypa/nova/PYSEC-2026-2685 |
| Aliases |
CVE-2026-24708
GHSA-m4f3-qp2w-gwh6 PYSEC-2026-2685 |
| Summary | OpenStack Nova calls qemu-img without format restrictions for resize An issue was discovered in OpenStack Nova before 30.2.2, 31 before 31.2.1, and 32 before 32.1.1. By writing a malicious QCOW header to a root or ephemeral disk and then triggering a resize, a user may convince Nova's Flat image backend to call qemu-img without a format restriction, resulting in an unsafe image resize operation that could destroy data on the host system. Only compute nodes using the Flat image backend (usually configured with use_cow_images=False) are affected. |
| Status | Published |
| Exploitability | 0.5 |
| Weighted Severity | 7.4 |
| Risk | 3.7 |
| Affected and Fixed Packages | Package Details |
| Introduced and Fixed Package Commit Patches | Package Commit Patches Details |
| There are no known CWE. |
| System | Score | Found at |
|---|---|---|
| cvssv3.1 | 8.2 | https://github.com/pypa/advisory-database/blob/main/vulns/nova/PYSEC-2026-2685.yaml |
No exploits are available.
No EPSS data available for this advisory.
| Patch URL | |
|---|---|
| There are no known patches. | |
| Attack Vector (AV) | Attack Complexity (AC) | Privileges Required (PR) | User Interaction (UI) | Scope (S) | Confidentiality Impact (C) | Integrity Impact (I) | Availability Impact (A) |
|---|---|---|---|---|---|---|---|
network adjacent_network local physical |
low high |
none low high |
none required |
unchanged changed |
high low none |
high low none |
high low none |
Vector: SSVCv2/E:N/A:N/T:P/P:M/B:A/M:M/D:T/2026-02-19T19:07:53Z/
Decision: Track
Source URL: https://github.com/cisagov/vulnrichment/blob/develop/2026/24xxx/CVE-2026-24708.json
Source Advisory: vulnrichment/CVE-2026-24708
[{'Exploitation': 'none'},
{'Automatable': 'no'},
{'Technical Impact': 'partial'},
{'Mission Prevalence': 'minimal'},
{'Public Well-being Impact': 'material'},
{'Mission & Well-being': 'medium'}]