WS-2026-0233
Published:October 24, 2026
Updated:November 13, 2026
bun 1.3.14 - 1.4.3, @oven/bun-<platform> 1.3.14 - 1.4.3: The HTTP/3 (QPACK) header decoder in Bun.serve and the HTTP/3 fetch client does not enforce a limit on the decoded size or field count of a header set, so a small request referencing a large dynamic-table entry many times exhausts memory or stalls the process (GHSA-cf8x-9m69-3gg3)
Affected Packages
https://github.com/oven-sh/bun.git (GITHUB):
Affected version(s) >=bun-v1.3.14 <bun-v1.4.4Fix Suggestion:
Update to version bun-v1.4.4@oven/bun-linux-x64-musl (NPM):
Affected version(s) >=1.4.3-canary.20261010.1 <1.4.4 || >=1.3.14 <1.4.4Fix Suggestion:
Update to version 1.4.4bun (NPM):
Affected version(s) >=1.4.3-canary.20261010.1 <1.4.4 || >=1.3.14 <1.4.4Fix Suggestion:
Update to version 1.4.4@oven/bun-linux-x64 (NPM):
Affected version(s) >=1.4.3-canary.20261010.1 <1.4.4 || >=1.3.14 <1.4.4Fix Suggestion:
Update to version 1.4.4@oven/bun-darwin-aarch64 (NPM):
Affected version(s) >=1.4.3-canary.20261010.1 <1.4.4 || >=1.3.14 <1.4.4Fix Suggestion:
Update to version 1.4.4@oven/bun-linux-aarch64-android (NPM):
Affected version(s) >=1.4.3-canary.20261010.1 <1.4.4 || >=1.3.14 <1.4.4Fix Suggestion:
Update to version 1.4.4@oven/bun-linux-aarch64-musl (NPM):
Affected version(s) >=1.4.3-canary.20261010.1 <1.4.4 || >=1.3.14 <1.4.4Fix Suggestion:
Update to version 1.4.4@oven/bun-windows-aarch64 (NPM):
Affected version(s) >=1.4.3-canary.20261010.1 <1.4.4 || >=1.3.14 <1.4.4Fix Suggestion:
Update to version 1.4.4@oven/bun-linux-aarch64 (NPM):
Affected version(s) >=1.4.3-canary.20261010.1 <1.4.4 || >=1.3.14 <1.4.4Fix Suggestion:
Update to version 1.4.4@oven/bun-linux-x64-baseline (NPM):
Affected version(s) >=1.4.3-canary.20261010.1 <1.4.4 || >=1.3.14 <1.4.4Fix Suggestion:
Update to version 1.4.4@oven/bun-windows-x64-baseline (NPM):
Affected version(s) >=1.4.3-canary.20261010.1 <1.4.4 || >=1.3.14 <1.4.4Fix Suggestion:
Update to version 1.4.4@oven/bun-darwin-x64-baseline (NPM):
Affected version(s) >=1.4.3-canary.20261010.1 <1.4.4 || >=1.3.14 <1.4.4Fix Suggestion:
Update to version 1.4.4@oven/bun-freebsd-x64 (NPM):
Affected version(s) >=1.4.3-canary.20261010.1 <1.4.4 || >=1.3.14 <1.4.4Fix Suggestion:
Update to version 1.4.4@oven/bun-linux-x64-musl-baseline (NPM):
Affected version(s) >=1.4.3-canary.20261010.1 <1.4.4 || >=1.3.14 <1.4.4Fix Suggestion:
Update to version 1.4.4@oven/bun-linux-x64-android (NPM):
Affected version(s) >=1.4.3-canary.20261010.1 <1.4.4 || >=1.3.14 <1.4.4Fix Suggestion:
Update to version 1.4.4@oven/bun-darwin-x64 (NPM):
Affected version(s) >=1.4.3-canary.20261010.1 <1.4.4 || >=1.3.14 <1.4.4Fix Suggestion:
Update to version 1.4.4@oven/bun-freebsd-aarch64 (NPM):
Affected version(s) >=1.4.3-canary.20261010.1 <1.4.4 || >=1.3.14 <1.4.4Fix Suggestion:
Update to version 1.4.4@oven/bun-windows-x64 (NPM):
Affected version(s) >=1.4.3-canary.20261010.1 <1.4.4 || >=1.3.14 <1.4.4Fix Suggestion:
Update to version 1.4.4Related Resources (4)
Do you need more information?
Contact UsCVSS v4
Base Score:
8.7
Attack Vector
NETWORK
Attack Complexity
LOW
Attack Requirements
NONE
Privileges Required
NONE
User Interaction
NONE
Vulnerable System Confidentiality
NONE
Vulnerable System Integrity
NONE
Vulnerable System Availability
HIGH
Subsequent System Confidentiality
NONE
Subsequent System Integrity
NONE
Subsequent System Availability
NONE
CVSS v3
Base Score:
7.5
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
NONE
Availability
HIGH
Weakness Type (CWE)
Allocation of Resources Without Limits or Throttling