CVE-2023-3635

Name: CVE-2023-3635
Creator: NVD / NIST
Published: 2023-07-12T19:15:08.983+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.5/10EPSS 1.08%

Last modified Jun 17, 2026

CVE-2023-3635 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. GzipSource does not handle an exception that might be raised when parsing a malformed gzip buffer. This may lead to denial of service of the Okio client when handling a crafted GZIP archive, by using the GzipSource class. . EPSS estimates a 1.08% chance of exploitation in the next 30 days.

Description

GzipSource does not handle an exception that might be raised when parsing a malformed gzip buffer. This may lead to denial of service of the Okio client when handling a crafted GZIP archive, by using the GzipSource class.

Metrics

CVSS 3.1

7.5/10

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

EPSS Probability

1.08%

60.8th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Squareup	Okio	>= 0.5.0, < 1.17.6
Squareup	Okio	>= 2.0.0, < 3.4.0

References

https://github.com/square/okio/commit/81bce1a30af244550b0324597720e4799281da7bPatch
https://research.jfrog.com/vulnerabilities/okio-gzip-source-unhandled-exception-dos-xray-523195/Exploit, Patch, Third Party Advisory
https://github.com/square/okio/commit/81bce1a30af244550b0324597720e4799281da7bPatch
https://research.jfrog.com/vulnerabilities/okio-gzip-source-unhandled-exception-dos-xray-523195/Exploit, Patch, Third Party Advisory

Timeline

Published: Jul 12, 2023
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2023-3635?

How severe is CVE-2023-3635?

CVE-2023-3635 has a CVSS score of 7.5/10 (HIGH severity). The EPSS model estimates a 1.08% probability of exploitation in the next 30 days.

How do I fix CVE-2023-3635?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2023-3635?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST