How severe is GHSA-2w87-5qcj-j6gx?

No CVSS score has been assigned to GHSA-2w87-5qcj-j6gx yet. Review the advisory details and affected package list to assess your exposure.

Which packages are affected by GHSA-2w87-5qcj-j6gx?

GHSA-2w87-5qcj-j6gx affects the following packages: nova (PyPI). Ecosystems affected: PyPI.

How do I fix GHSA-2w87-5qcj-j6gx?

Update nova to 12.0.0a0 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms GHSA-2w87-5qcj-j6gx is resolved across your whole dependency graph.

How do I detect GHSA-2w87-5qcj-j6gx in my PyPI dependencies?

Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for nova, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.

How do I mitigate GHSA-2w87-5qcj-j6gx if there is no patch (or I can't update yet)?

Cap what an attacker can consume: apply request size, rate and timeout limits in front of the affected component, and run it with memory and CPU limits so exhaustion degrades one worker rather than the whole service.

Is GHSA-2w87-5qcj-j6gx actively exploited in the wild?

Yes. There are 1 known exploit references for GHSA-2w87-5qcj-j6gx, including 1 in-the-wild exploitation observed on GitHub and other sources. Treat this as actively exploitable and prioritize patching immediately. All exploit code should only be run in an isolated sandbox environment for research or authorized testing — never against production systems without explicit written authorization.

What is the EPSS score for GHSA-2w87-5qcj-j6gx?

GHSA-2w87-5qcj-j6gx has an EPSS (Exploit Prediction Scoring System) score of 0.4%, placing it in the 39th percentile of all CVEs. EPSS is maintained by FIRST.org and estimates the probability that a vulnerability will be exploited in the wild within the next 30 days. This score indicates relatively lower exploitation probability, though the CVSS severity should still guide your patching priority.

What type of vulnerability is GHSA-2w87-5qcj-j6gx?

GHSA-2w87-5qcj-j6gx is classified as CWE-399 (CWE-399). This weakness type describe the underlying flaw category, which helps determine the potential impact and the right class of mitigation.

When was GHSA-2w87-5qcj-j6gx published, and has it been updated?

GHSA-2w87-5qcj-j6gx was published on May 17, 2022 and was last updated on July 7, 2026. Advisory data evolves as severity scores, affected ranges, and exploit intelligence are revised — always check the latest version of the advisory before acting.

🐍 PyPI

Not in CISA KEV

OpenStack Compute (Nova) Denial of service due to improper validation of virtual size of QCOW2 imageGHSA-2w87-5qcj-j6gx

Fix: openstack/nova@135faa7

GHSA-2w87-5qcj-j6gx is a CWE-399 vulnerability in nova. 1 public exploit or proof-of-concept reference is indexed, so weaponization risk is real. A fix is available for nova — see the affected versions and patch details below.

Also known asCVE-2013-4469PYSEC-2026-860

Published

May 17, 2022

Updated

Jul 7, 2026

Affected

1 pkg

Patched

1 / 1

Exploits

1 known

Exploitation data as of Nov 9, 2026 · OSV.dev, NVD, FIRST.org (EPSS)

EPSS Exploitation Probability

via FIRST.org ↗

0.4%probability of exploitation in next 30 days

Lower Risk0.00%

Lower risk than most CVEs39th percentile — riskier than 39% of all scored CVEsHighest risk

Probability of exploitation in the next 30 days, from FIRST.org EPSS.

Real-World Exposure

1 pkg affected

🐍nova

Real-time download stats are indexed for npm and PyPI packages. This vulnerability affects PyPI packages — download data is not available via public APIs for these ecosystems.

Description

OpenStack Compute (Nova) Folsom, Grizzly, and Havana, when use_cow_images is set to False, does not verify the virtual size of a QCOW2 image, which allows local users to cause a denial of service (host file system disk consumption) by transferring an image with a large virtual size that does not contain a large amount of data from Glance. NOTE: this issue is due to an incomplete fix for CVE-2013-2096.

Affected Packages

1 total 1 fixed

Ecosystem	Package	Vulnerable range	Fix
🐍PyPI	`nova`	all versions	12.0.0a0`pip install --upgrade 'nova==12.0.0a0'`

Affected Products

3 products · 3 configurations

Application

folsomopenstack

all

Application

grizzlyopenstack

all

Application

havanaopenstack

all

Exploits & PoCs

Research use only. For defensive security, authorized penetration testing, and academic research only. Never execute exploit code against systems without explicit written authorization.

OpenStack Compute (Nova) Folsom, Grizzly, and Havana, when use_cow_image…

bugs.launchpad.netNVDJun 2014

Detection & mitigation playbook

Open-source dependency

Detect
Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for nova, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.
Fix
Update nova to 12.0.0a0 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms GHSA-2w87-5qcj-j6gx is resolved across your whole dependency graph.
Workarounds
Cap what an attacker can consume: apply request size, rate and timeout limits in front of the affected component, and run it with memory and CPU limits so exhaustion degrades one worker rather than the whole service.