Predictive Vulnerability Intelligence.

Product

  • Product
  • Pricing
  • Documentation

Company

  • About
  • Partnerships
  • Blog
  • Support

Legal

  • Terms
  • Privacy
  • Data Licensing

© 2026 FAUCET Technologies LLC. All rights reserved.

CVE-2023-3635

24
FAUCET Score

CVE-2023-3635 describes a denial-of-service vulnerability in Square's Okio library, specifically within its GzipSource class. A remote attacker can trigger this by providing a malformed gzip buffer, causing the client application to crash. With a CVSS score of 7.5 (High), this vulnerability is easily exploitable over the network with low complexity, leading to a complete loss of availability for affected systems. While there are no known public exploits or active exploitation in the wild, the vulnerability has garnered some community discussion and media coverage, indicating awareness within the cybersecurity community.

Impacted Technologies

VendorProductVersion(s)CPE
>= 0.5.0, < 1.17.6CPE matchmatch criteria
cpe:2.3:a:squareup:okio:*:*:*:*:*:*:*:*
>= 2.0.0, < 3.4.0CPE matchmatch criteria
cpe:2.3:a:squareup:okio:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

5.9MEDIUM

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

Attack Vector
NETWORK
Attack Complexity
HIGH
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
Exploitability Score
2.2
Impact Score
3.6
CvssVersion
3.1

Exploit Intelligence

EPSS Score
1.25%
Probability of exploitation in next 30 days
EPSS Percentile
66.4%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0125 is in the 46th percentile among its peer group of 51,506 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.4 GitHub mentions.

Media Mentions

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (27)

github_advisorypatch availablevia nvd_reference
View patch
mavenpatch availablevia ghsa
Product: com.squareup.okio:okioFixed in: 3.4.0
mavenpatch availablevia ghsa
Product: com.squareup.okio:okioFixed in: 1.17.6
mavenpatch availablevia ghsa
Product: com.squareup.okio:okio-jvmFixed in: 3.4.0
redhatpatch availablevia redhat_api
Product: Red Hat OpenShift Dev Spaces 3 ContainersFixed in: devspaces/code-rhel8:3.16-20
View patch
redhatpatch availablevia redhat_api
Product: Red Hat OpenShift Dev Spaces 3 ContainersFixed in: devspaces/configbump-rhel8:3.16-4
View patch
redhatpatch availablevia redhat_api
Product: Red Hat OpenShift Dev Spaces 3 ContainersFixed in: devspaces/dashboard-rhel8:3.16-27
View patch
redhatpatch availablevia redhat_api
Product: Red Hat OpenShift Dev Spaces 3 ContainersFixed in: devspaces/devfileregistry-rhel8:3.16-67
View patch
redhatpatch availablevia redhat_api
Product: Red Hat OpenShift Dev Spaces 3 ContainersFixed in: devspaces/devspaces-operator-bundle:3.16-70
View patch
redhatpatch availablevia redhat_api
Product: Red Hat OpenShift Dev Spaces 3 ContainersFixed in: devspaces/devspaces-rhel8-operator:3.16-11
View patch
redhatpatch availablevia redhat_api
Product: Red Hat OpenShift Dev Spaces 3 ContainersFixed in: devspaces/imagepuller-rhel8:3.16-3
View patch
redhatpatch availablevia redhat_api
Product: Red Hat OpenShift Dev Spaces 3 ContainersFixed in: devspaces/machineexec-rhel8:3.16-6
View patch
redhatpatch availablevia redhat_api
Product: Red Hat OpenShift Dev Spaces 3 ContainersFixed in: devspaces/pluginregistry-rhel8:3.16-16
View patch
redhatpatch availablevia redhat_api
Product: Red Hat OpenShift Dev Spaces 3 ContainersFixed in: devspaces/server-rhel8:3.16-14
View patch
redhatpatch availablevia redhat_api
Product: Red Hat OpenShift Dev Spaces 3 ContainersFixed in: devspaces/traefik-rhel8:3.16-2
View patch
redhatpatch availablevia redhat_api
Product: Red Hat OpenShift Dev Spaces 3 ContainersFixed in: devspaces/udi-rhel8:3.16-6
View patch
redhatpatch availablevia redhat_api
Product: RHPAM 7.13.5 asyncFixed in: okio
View patch
redhatpatch availablevia redhat_api
Product: Red Hat OpenShift Dev Spaces 3 ContainersFixed in: devspaces/idea-rhel8:3.16-3
View patch
redhatpatch availablevia redhat_api
Product: Red Hat AMQ Streams 2.5.0
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Fuse 7.12.1Fixed in: okio
View patch
redhatpatch availablevia redhat_api
Product: Red Hat JBoss Enterprise Application Platform Expansion PackFixed in: okio
View patch
redhatvendor investigatingvia redhat_api
Product: Red Hat Data Grid 8Fixed in: okio
redhatvendor investigatingvia redhat_api
Product: Red Hat support for Spring BootFixed in: okio
redhatno patchvia redhat_api
Product: Red Hat build of Apicurio Registry 2Fixed in: okio
redhatno patchvia redhat_api
Product: streams for Apache KafkaFixed in: okio
redhatend of lifevia redhat_api
Product: Red Hat OpenShift Application RuntimesFixed in: okio
redhatend of lifevia redhat_api
Product: Red Hat Single Sign-On 7Fixed in: okio

Vendor Advisories (2)

mavenGHSA-w33c-445m-f8w7medium

Okio Signed to Unsigned Conversion Error vulnerability

Jul 12, 2023
redhatCVE-2023-3635Important

okio: GzipSource class improper exception handling

Jul 12, 2023

References

github.com / square/okio/commit/81bce1a30af244550b0324597720e4799281da7b
Patch
research.jfrog.com / vulnerabilities/okio-gzip-source-unhandled-exception-dos-xray-523195
ExploitPatchThird Party Advisory