Nixpkgs security tracker
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CVE-2026-47736
7.5 HIGH
- CVSS version (CVSS): 3.1
- Attack Vector (AV): Network (N)
- Attack Complexity (AC): Low (L)
- Privileges Required (PR): None (N)
- User Interaction (UI): None (N)
- Scope (S): Unchanged (U)
- Confidentiality (C): None (N)
- Integrity (I): None (N)
- Availability (A): High (H)
- Modified Attack Vector (MAV): Network (N)
- Modified Attack Complexity (MAC): Low (L)
- Modified Privileges Required (MPR): None (N)
- Modified User Interaction (MUI): None (N)
- Modified Confidentiality (MC): None (N)
- Modified Scope (MS): Unchanged (U)
- Modified Integrity (MI): None (N)
- Modified Availability (MA): High (H)
Activity log
- Created suggestion
Puma PROXY Protocol v1 Parser Allows Remote Memory Exhaustion
Puma is a Ruby/Rack web server built for parallelism. From 5.5.0 until 7.2.1 and 8.0.2, when PROXY protocol v1 support is enabled, Puma reads incoming bytes into an internal buffer while waiting for CRLF to determine whether a PROXY v1 line is present, allowing an attacker that continuously sends bytes without CRLF to cause unbounded in-process memory growth and additional CPU cost from repeatedly scanning the growing buffer. This issue is fixed in versions 7.2.1 and 8.0.2.
References
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https://github.com/puma/puma/security/advisories/GHSA-qpgp-93vx-g8v8 x_refsource_CONFIRM
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https://github.com/puma/puma/releases/tag/v7.2.1 x_refsource_MISC
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https://github.com/puma/puma/releases/tag/v8.0.2 x_refsource_MISC
Affected products
puma
- ==>= 5.5.0, < 7.2.1
- ==>= 8.0.0, < 8.0.2