CVE-2026-83803
Received Received - Intake

Sentry Unsafe Deserialization Leading to Code Execution

Publication date: 2026-09-22

Last updated on: 2026-09-22

Assigner: GitHub, Inc.

Description
Sentry is an error tracking and performance monitoring tool. From 23.11.0 until 26.7.0, Sentry instances with the relocation feature enabled unsafely deserialize a legacy database field while importing a user-supplied relocation archive. An authenticated user can craft an archive that causes arbitrary code execution in the import worker process. Self-hosted installations using the default configuration are not affected because the relocation feature is disabled by default. This issue is fixed in version 26.7.0.

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Meta Information

Published
2026-09-22
Last Modified
2026-09-22
Generated
2026-09-22
AI Q&A
2026-09-22
EPSS Evaluated
N/A
NVD
CVE-2026-83803
EUVD
EUVD-2026-84552

Affected Vendors & Products

Showing 3 associated CPEs
Vendor Product Version / Range
getsentry sentry From 23.11.0 (inc) to 26.7.0 (exc)
getsentry sentry 26.7.0
sentry sentry From 23.11.0 (inc) to 26.7.0 (inc)

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Exploitability

CWE
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KEV
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CWE ID Description
CWE-502 The product deserializes untrusted data without sufficiently ensuring that the resulting data will be valid.

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Executive Summary

This vulnerability in Sentry allows an authenticated user to execute arbitrary code by crafting a malicious relocation archive. It occurs because the software unsafely deserializes a legacy database field during import operations when the relocation feature is enabled. The issue is fixed in version 26.7.0.

Detection Guidance

To detect this vulnerability, check if your Sentry instance is running a vulnerable version (23.11.0 to 26.6.x) and if the relocation feature is enabled. Inspect configuration files for settings like relocation.enabled or daily limits. No specific commands are provided in the context.

Impact Analysis

An attacker could gain control of the import worker process, leading to potential data breaches, system compromise, or unauthorized access. Self-hosted instances are only affected if the relocation feature is manually enabled.

Compliance Impact

This vulnerability could lead to unauthorized data access or exfiltration, violating GDPR's data protection principles or HIPAA's security requirements. Organizations must patch or disable the feature to maintain compliance.

Mitigation Strategies

Immediately upgrade Sentry to version 26.7.0 or later. If upgrading is not possible, disable the relocation feature by setting relocation.enabled to False or set all daily limits (small, medium, large) to 0 in the configuration.

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