How severe is CVE-2019-11255?

CVE-2019-11255 has a CVSS score of 6.5/10, rated MEDIUM. Review your exposure and patch according to your risk tolerance.

Which packages are affected by CVE-2019-11255?

CVE-2019-11255 affects the following packages: github.com/kubernetes-csi/external-provisioner (Go), github.com/kubernetes-csi/external-provisioner (Go), github.com/kubernetes-csi/external-provisioner (Go), github.com/kubernetes-csi/external-provisioner (Go), github.com/kubernetes-csi/external-provisioner (Go), github.com/kubernetes-csi/external-snapshotter/v6 (Go), github.com/kubernetes-csi/external-snapshotter/v6 (Go), github.com/kubernetes-csi/external-snapshotter/v6 (Go), and 2 more. Ecosystems affected: Go.

How do I fix CVE-2019-11255?

Update github.com/kubernetes-csi/external-provisioner to 0.4.3 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2019-11255 is resolved across your whole dependency graph.

How do I detect CVE-2019-11255 in my Go dependencies?

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

How do I mitigate CVE-2019-11255 if there is no patch (or I can't update yet)?

If you can't upgrade right away: gate or disable the affected feature, validate untrusted input at the boundary, and avoid passing attacker-controlled data into the vulnerable path. O3's runtime protection blocks exploitation in production as an interim safeguard until the upgrade lands.

Is CVE-2019-11255 actively exploited in the wild?

No public exploit code has been indexed for CVE-2019-11255 yet. This does not mean the vulnerability cannot be exploited — absence of public exploits does not imply safety. Apply the recommended fix and use O3 Security to monitor your exposure.

What is the EPSS score for CVE-2019-11255?

CVE-2019-11255 has an EPSS (Exploit Prediction Scoring System) score of 2.0%, placing it in the 81th 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 CVE-2019-11255?

CVE-2019-11255 is classified as Improper Input Validation (CWE-20). This weakness type describe the underlying flaw category, which helps determine the potential impact and the right class of mitigation.

When was CVE-2019-11255 published, and has it been updated?

CVE-2019-11255 was published on December 5, 2019 and was last updated on October 24, 2026. Advisory data evolves as severity scores, affected ranges, and exploit intelligence are revised — always check the latest version of the advisory before acting.

🐹

🐹 Go

Not in CISA KEV

MEDIUM severity

CVE-2019-11255 — external-provisioner

MEDIUM

CVE-2019-11255 is a medium-severity (CVSS 6.5) Improper Input Validation vulnerability in github.com/kubernetes-csi/external-provisioner. A fix is available for github.com/kubernetes-csi/external-provisioner — see the affected versions and patch details below.

Kubernetes CSI Sidecar Containers Can Allow Unauthorized Data Access

Also known asGHSA-f4w6-3rh6-6q4q

Published

Dec 5, 2019

Updated

Oct 24, 2026

Affected

10 pkgs

Patched

6 / 10

Exploits

None indexed

Exploitation data as of Nov 1, 2026 · OSV.dev, NVD, FIRST.org (EPSS)

EPSS Exploitation Probability

via FIRST.org ↗

2.0%probability of exploitation in next 30 days

Lower Risk+0.05%

Lower risk than most CVEs81th percentile — riskier than 81% of all scored CVEsHighest risk

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

How urgent is this, really

Where this sits among everything scored

Real-World Exposure

10 pkgs affected

🐹github.com/kubernetes-csi/external-provisioner🐹github.com/kubernetes-csi/external-provisioner🐹github.com/kubernetes-csi/external-provisioner🐹github.com/kubernetes-csi/external-provisioner🐹github.com/kubernetes-csi/external-provisioner🐹github.com/kubernetes-csi/external-snapshotter/v6🐹github.com/kubernetes-csi/external-snapshotter/v6🐹github.com/kubernetes-csi/external-snapshotter/v6+2 more

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

Description

Improper input validation in Kubernetes CSI sidecar containers for external-provisioner (<v0.4.3, <v1.0.2, v1.1, <v1.2.2, <v1.3.1), external-snapshotter (<v0.4.2, <v1.0.2, v1.1, <1.2.2), and external-resizer (v0.1, v0.2) could result in unauthorized PersistentVolume data access or volume mutation during snapshot, restore from snapshot, cloning and resizing operations.

Affected Packages

10 total 6 fixed

Ecosystem	Package	Vulnerable range	Fix
🐹Go	`github.com/kubernetes-csi/external-provisioner`	all versions	0.4.3`go get github.com/kubernetes-csi/external-provisioner@v0.4.3`
🐹Go	`github.com/kubernetes-csi/external-provisioner`	≥ 1.0.0&&< 1.0.2	1.0.2`go get github.com/kubernetes-csi/external-provisioner@v1.0.2`
🐹Go	`github.com/kubernetes-csi/external-provisioner`	all versions	No fix
🐹Go	`github.com/kubernetes-csi/external-provisioner`	≥ 1.2.0&&< 1.2.2	1.2.2`go get github.com/kubernetes-csi/external-provisioner@v1.2.2`
🐹Go	`github.com/kubernetes-csi/external-provisioner`	≥ 1.3.0&&< 1.3.1	1.3.1`go get github.com/kubernetes-csi/external-provisioner@v1.3.1`
🐹Go	`github.com/kubernetes-csi/external-snapshotter/v6`	≥ 1.0.0&&< 1.0.2	1.0.2`go get github.com/kubernetes-csi/external-snapshotter/v6@v1.0.2`

Affected Products

4 products · 11 configurations

Application

external-provisionerkubernetes

≥ 1.1.0 && ≤ 1.2.1

1 version

1.3.0

Application

external-resizerkubernetes

≥ 0.1.0 && ≤ 0.2.0

range

Application

external-snapshotterkubernetes

≥ 1.1.0 && ≤ 1.2.1

range

Application

openshift container platformredhat

3 versions

3.114.14.2

Detection & mitigation playbook

Open-source dependency

Detect
Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for github.com/kubernetes-csi/external-provisioner, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.
Fix
Update github.com/kubernetes-csi/external-provisioner to 0.4.3 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2019-11255 is resolved across your whole dependency graph.
Workarounds
If you can't upgrade right away: gate or disable the affected feature, validate untrusted input at the boundary, and avoid passing attacker-controlled data into the vulnerable path. O3's runtime protection blocks exploitation in production as an interim safeguard until the upgrade lands.

Fixing This On Your OS

If you run this on a Linux distribution, patch through your package manager against the distro's own security advisory below — it tracks the exact backported fix for your release, which can ship on a different timeline (and sometimes a different severity) than the upstream project.

Red HatModerate

OpenShift Container Storage Interface (CSI) is a Technology Preview (TP) feature in OpenShift Container Platform before version 4.2. https://access.redhat.com/support/offerings/techpreview

Product	Fixed in	Advisory
Red Hat OpenShift Container Platform 3.11	`openshift-external-storage-0:0.0.2-10.gitd3c94f0.el7`	RHSA-2019:4054
Red Hat OpenShift Container Platform 4.1	`openshift-external-storage-0:0.0.2-11.gitd3c94f0.el7`	RHSA-2019:4225
Red Hat OpenShift Container Platform 4.2	`openshift-external-storage-0:0.0.2-11.gitd3c94f0.el7`	RHSA-2019:4096
Red Hat OpenShift Container Platform 4.2	`openshift4/ose-csi-external-provisioner-rhel7:v4.2.10-201912022352`	RHSA-2019:4099

Frequently Asked Questions

O3 Security · Impact-Aware SCA

Is CVE-2019-11255 in your dependencies?

Find it across Go, including transitive dependencies.

Scan my dependencies How O3 SCA works

CVSS Score

6.5/10CVSS v3 base

Vector breakdown

Attack Vector

Network

Attack Complexity

Low

Privileges Required

High

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

None

Raw vector

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

CWE Classification

CWE-20Improper Input Validation

Weaponization

No Nuclei template, Metasploit module or public proof-of-concept found.

OpenSSF Scorecard

Package health score

kubernetes

7.6/10

Code-Review10/10

Maintained10/10

Branch-ProtectionN/A

Assessed Oct 19, 2026

Timeline

Disclosed

Dec 5, 2019

Last updated

Oct 24, 2026

Identifiers

CVE-2019-11255

GHSA-f4w6-3rh6-6q4q

References

Advisoryaccess.redhat.com · RHSA 2019:4054 Advisoryaccess.redhat.com · RHSA 2019:4096 Advisoryaccess.redhat.com · RHSA 2019:4099 Advisoryaccess.redhat.com · RHSA 2019:4225 Advisorysecurity.netapp.com · ntap 20200810 0003 Advisorynvd.nist.gov · CVE 2019 11255 Reportgithub.com Webgroups.google.com · forum Webgroups.google.com · forum Websecurity.netapp.com · ntap 20200810 0003

Related vulnerabilities

This CVE is medium severity; 6 of 8 other CVEs with CWE-20 are rated as high or higher (top: critical).

GHSA-fmc8-p6q7-75ccGHSA-pjff-c2wc-f6jmCVE-2026-44265CVE-2026-119280CVE-2026-96631CVE-2026-119210CVE-2026-59978GHSA-c33x-vcv4-vg3gBrowse all CWE-20

Provenance

Sources

OSV.devNVDFIRST.org (EPSS)

Last verifiedOct 24, 2026

CVE-2019-11255 — external-provisioner

EPSS Exploitation Probability

How urgent is this, really

Where this sits among everything scored

Real-World Exposure

Description

Affected Packages

Affected Products

Detection & mitigation playbook

Detect

Fix

Workarounds

Fixing This On Your OS

Frequently Asked Questions

Is CVE-2019-11255 in your dependencies?