A denial-of-service vulnerability exists in github.com/sirupsen/logrus when using Entry.Writer() to log a single-line payload larger than 64KB without newline characters. Due to limitations in the internal bufio.Scanner, the read fails with "token too long" and the writer pipe is closed, leaving Writer() unusable and causing application unavailability (DoS). This affects versions < 1.8.3, 1.9.0, and 1.9.2. The issue is fixed in 1.8.3, 1.9.1, and 1.9.3+, where the input is chunked and the writer continues to function even if an error is logged.
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Affected Vendors & Products
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History
Fri, 05 Dec 2025 22:15:00 +0000
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| Weaknesses | CWE-400 | |
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cvssV3_1
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Fri, 05 Dec 2025 11:00:00 +0000
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| First Time appeared |
Logrus Project
Logrus Project logrus |
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| Vendors & Products |
Logrus Project
Logrus Project logrus |
Thu, 04 Dec 2025 18:30:00 +0000
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| Description | A denial-of-service vulnerability exists in github.com/sirupsen/logrus when using Entry.Writer() to log a single-line payload larger than 64KB without newline characters. Due to limitations in the internal bufio.Scanner, the read fails with "token too long" and the writer pipe is closed, leaving Writer() unusable and causing application unavailability (DoS). This affects versions < 1.8.3, 1.9.0, and 1.9.2. The issue is fixed in 1.8.3, 1.9.1, and 1.9.3+, where the input is chunked and the writer continues to function even if an error is logged. | |
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Status: PUBLISHED
Assigner: mitre
Published: 2025-12-04T00:00:00.000Z
Updated: 2025-12-05T21:52:59.784Z
Reserved: 2025-11-18T00:00:00.000Z
Link: CVE-2025-65637
Updated: 2025-12-05T21:52:53.941Z
Status : Received
Published: 2025-12-04T19:16:05.223
Modified: 2025-12-05T22:15:51.453
Link: CVE-2025-65637
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