VU#212479: Sentry Seer vulnerability allows attacker-controlled input to be executed in a privileged environment
A vulnerability in Sentry Seer allows attacker-controlled input submitted via a public telemetry endpoint to be executed in a privileged coding-agent environment. This occurs when Seer is configured to automatically hand off issues to a coding agent for remediation. Malicious event data can propagate through Seer's analysis pipeline and cause the coding agent to execute attacker-controlled code before any human review. No vendor patch is currently available.
AI Analysis
Technical Summary
Sentry is a software error-monitoring platform that includes Seer, an automated debugging assistant. When Seer is enabled to automatically pass issues to an integrated coding agent, attacker-generated exception events submitted through Sentry's public DSN can traverse trust boundaries. These malicious events influence Seer's root-cause analysis, which is embedded in prompts to the coding agent. The coding agent then downloads and executes attacker-controlled packages within its privileged environment, leading to arbitrary code execution. This vulnerability is tracked as CVE-2026-90999. No official patch or vendor advisory has been provided yet.
Potential Impact
Successful exploitation allows arbitrary code execution within the coding-agent environment that processes the affected repository, potentially compromising the integrity of the source code and connected repositories. This could lead to unauthorized access and manipulation of code before any human review occurs.
Mitigation Recommendations
No official vendor patch or fix is currently available. Recommended mitigations include disabling automated remediation flows that hand off issues to the coding agent, restricting coding-agent package installations, or disabling Seer handoff functionality until a fix is released. Additionally, filtering and sanitizing telemetry content before Seer analysis may reduce the risk of exploitation.
VU#212479: Sentry Seer vulnerability allows attacker-controlled input to be executed in a privileged environment
Description
A vulnerability in Sentry Seer allows attacker-controlled input submitted via a public telemetry endpoint to be executed in a privileged coding-agent environment. This occurs when Seer is configured to automatically hand off issues to a coding agent for remediation. Malicious event data can propagate through Seer's analysis pipeline and cause the coding agent to execute attacker-controlled code before any human review. No vendor patch is currently available.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
Sentry is a software error-monitoring platform that includes Seer, an automated debugging assistant. When Seer is enabled to automatically pass issues to an integrated coding agent, attacker-generated exception events submitted through Sentry's public DSN can traverse trust boundaries. These malicious events influence Seer's root-cause analysis, which is embedded in prompts to the coding agent. The coding agent then downloads and executes attacker-controlled packages within its privileged environment, leading to arbitrary code execution. This vulnerability is tracked as CVE-2026-90999. No official patch or vendor advisory has been provided yet.
Potential Impact
Successful exploitation allows arbitrary code execution within the coding-agent environment that processes the affected repository, potentially compromising the integrity of the source code and connected repositories. This could lead to unauthorized access and manipulation of code before any human review occurs.
Mitigation Recommendations
No official vendor patch or fix is currently available. Recommended mitigations include disabling automated remediation flows that hand off issues to the coding agent, restricting coding-agent package installations, or disabling Seer handoff functionality until a fix is released. Additionally, filtering and sanitizing telemetry content before Seer analysis may reduce the risk of exploitation.
Technical Details
- Classification
- {"confidence":0.88,"severitySource":"heuristic","classifier":"rss-v2"}
- Article Source
- {"url":"https://kb.cert.org/vuls/id/212479","fetched":true,"fetchedAt":"2026-09-16T15:26:39.103Z","wordCount":580}
Threat ID: 6aaab52f55bf5e2cf5ca5ab8
Added to database: 09/16/2026, 15:26:39 UTC
Last enriched: 09/16/2026, 15:26:42 UTC
Last updated: 09/17/2026, 04:18:23 UTC
Views: 12
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