Improper Handling of Highly Compressed Data (Data Amplification) Affecting dfir-unfurl package, versions [, 20260405)
Threat Intelligence
Snyk has a proof-of-concept or detailed explanation of how to exploit this vulnerability.
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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- published30 Jan 2026
- disclosed29 Jan 2026
- creditMobasi AI Team
Introduced: 29 Jan 2026
CVE-2026-40036 (opens in a new tab)How to fix?
Upgrade dfir-unfurl to version 20260405 or higher.
Overview
dfir-unfurl is an Unfurl takes a URL and expands ("unfurls") it into a directed graph
Affected versions of this package are vulnerable to Improper Handling of Highly Compressed Data (Data Amplification) via the zlib.decompress function in the compressed data parsing process. An attacker can exhaust system memory and cause the service to crash by submitting a specially crafted, highly compressed payload that expands to a very large size upon decompression.