CRLF Injection Affecting bandit package, versions <1.12.5
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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Test your applications- Snyk IDSNYK-HEX-BANDIT-19233340
- published23 Aug 2026
- disclosed21 Aug 2026
- creditUnknown
Introduced: 21 Aug 2026
NewCVE-2026-75484 (opens in a new tab)How to fix?
Upgrade bandit to version 1.12.5 or higher.
Overview
bandit is a HTTP server for Plug and WebSock apps.
Affected versions of this package are vulnerable to CRLF Injection via the read_headers function. An attacker can inject CR, LF, or NUL characters into HTTP/2 header field values by sending specially crafted HTTP/2 requests. This can result in unvalidated header values being passed to downstream applications, potentially leading to header smuggling or manipulation of application logic.