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CVE-2023-3635

Okio GzipSource unhandled exception Denial of Service

HIGH
7.5
CVSS Score
Published: July 12, 2023 at 06:34 PM UTC
Updated: June 17, 2026 at 06:14 AM UTC
1 product affected across 1 vendorOkio

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Severity
HIGH7.5
Exploit prediction
EPSS 1%
SSVC
No known exploit

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Okio· Squareup
95%
0.5.0 ≤ v < 1.17.62.0.0 ≤ v < 3.4.0
Affected range stops below 1.17.6, so it looks safe — our inference, not a vendor statement
Affected range stops below 3.4.0, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

References (2)

Patch
Source: [email protected]
https://github.com/square/okio/commit/81bce1a30af244550b0324597720e4799281da7b
ExploitPatchThird Party Advisory
Source: [email protected]
https://research.jfrog.com/vulnerabilities/okio-gzip-source-unhandled-exception-dos-xray-523195/

SSVC — Action Prioritization

SSVCNo known exploitNot automatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

7.5HIGH[email protected]
Attack Vector
NETWORK
Complexity
LOW
Privileges
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
NONE
Availability
HIGH
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-195CWE-681

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