Description
Undici has an unbounded decompression chain in HTTP responses on Node.js Fetch API via Content-Encoding leads to resource exhaustion
Impact
The fetch() API supports chained HTTP encoding algorithms for response content according to RFC 9110 (e.g., Content-Encoding: gzip, br). This is also supported by the undici decompress interceptor.
However, the number of links in the decompression chain is unbounded and the default maxHeaderSize allows a malicious server to insert thousands compression steps leading to high CPU usage and excessive memory allocation.
Patches
Upgrade to 7.18.2 or 6.23.0.
Workarounds
It is possible to apply an undici interceptor and filter long Content-Encoding sequences manually.
References
Mitigation
Minimal update. May introduce new vulnerabilities or breaking changes.
|
 npm | | >=7.0.0 <7.18.2 || >=0 <6.23.0 | 7.18.2, 6.23.0 |
 debian 12 | | =5.15.0+dfsg1+~cs20.10.9.3-1 || =5.15.0+dfsg1+~cs20.10.9.3-1+deb12u1 || =5.15.0+dfsg1+~cs20.10.9.3-1+deb12u2 || =5.15.0+dfsg1+~cs20.10.9.3-1+deb12u3 || =5.15.0+dfsg1+~cs20.10.9.3-1+deb12u4 || =5.19.1+dfsg1+~cs20.10.9.5-1 || =5.19.1+dfsg1+~cs20.10.9.5-2 || =5.22.1+dfsg1+~cs20.10.10.2-1 || =5.26.3+dfsg1+~cs23.10.12-1 || =5.26.3+dfsg1+~cs23.10.12-2 || =5.26.3+dfsg1+~cs23.10.12-3 || =5.28.0+dfsg1+~cs23.11.12.3-1 || =5.28.0+dfsg1+~cs23.11.12.3-2 || =5.28.2+dfsg1+~cs23.11.12.3-1 || =5.28.2+dfsg1+~cs23.11.12.3-2 || =5.28.2+dfsg1+~cs23.11.12.3-3 || =5.28.2+dfsg1+~cs23.11.12.3-4 || =5.28.2+dfsg1+~cs23.11.12.3-5 || =5.28.2+dfsg1+~cs23.11.12.3-6 || =5.28.4+dfsg1+~cs23.12.11-1 || =5.28.4+dfsg1+~cs23.12.11-2 || =7.1.0+dfsg1+~cs24.12.10-1 || =7.15.0+dfsg+~cs3.2.0-1 || =7.15.0+dfsg+~cs3.2.0-3 || =7.16.0+dfsg+~cs3.2.0-1 || =7.16.0+dfsg+~cs3.2.0-2 || =7.18.2+dfsg+~cs3.2.0-1 || =7.2.3+dfsg1+~cs24.12.11-1 || =7.2.3+dfsg1+~cs24.12.11-2 || =7.24.5+dfsg+~cs3.2.0-1 || =7.24.6+dfsg+~cs3.2.0-1 || =7.24.6+dfsg+~cs3.2.0-2 || =7.3.0+dfsg1+~cs24.12.11-1 || =7.3.0+dfsg1+~cs24.12.11-2 | - |
debian 14 | | =7.15.0+dfsg+~cs3.2.0-1 || =7.15.0+dfsg+~cs3.2.0-3 || =7.16.0+dfsg+~cs3.2.0-1 || =7.16.0+dfsg+~cs3.2.0-2 || =7.3.0+dfsg1+~cs24.12.11-1 || =7.3.0+dfsg1+~cs24.12.11-2 || >=0 <7.18.2+dfsg+~cs3.2.0-1 | 7.18.2+dfsg+~cs3.2.0-1 |
debian 13 | | =7.15.0+dfsg+~cs3.2.0-1 || =7.15.0+dfsg+~cs3.2.0-3 || =7.16.0+dfsg+~cs3.2.0-1 || =7.16.0+dfsg+~cs3.2.0-2 || =7.18.2+dfsg+~cs3.2.0-1 || =7.24.5+dfsg+~cs3.2.0-1 || =7.24.6+dfsg+~cs3.2.0-1 || =7.24.6+dfsg+~cs3.2.0-2 || =7.3.0+dfsg1+~cs24.12.11-1 || =7.3.0+dfsg1+~cs24.12.11-2 | - |
 rpm rhel10 | | - | - |
rpm rhel10 | | - | - |
rpm rhel8 | | - | - |
rpm rhel9 | | - | - |
