Node2Shell: Node.js Brotli vulnerability allows remote code execution

No. 6 of 245 · aikido.dev · Written bySooraj Shah · published 23 Oct 2026, 00:54 UTC · 6 min read

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3 judges. Scored by all three judges. Only the day’s top stories get the claim check. How far stories are checked

Node.js released patches on October 21 (22.23.4, 24.22.1, 26.12.1) for CVE-2026-111497, nicknamed Node2Shell, an out-of-bounds write in its bundled Brotli decoder that can crash a process or allow code execution. Bun needs 1.4.4. The risk covers Express 5 request bodies, fetch() responses and direct node:zlib use. Researchers reported unreliable code execution on an unmodified 24.22.0 build, with no in-the-wild exploitation reported by October 22. End-of-life lines get no fix, and the Python Brotli and brotlicffi packages are also affected.

Read the original at aikido.dev. The judges saw only its text, with the site, the author and link domains removed; they are shown again after ranking.

Score

0.75total under rubric v2.0

Significance0.76
Reader interest0.90
Audience breadth0.76
Practical relevance0.97
Substantiated0.69
Technical depth0.78
New information0.91
Counts against: Promotional0.27
Counts against: Overclaim0.28

Each judge’s answer per question (0–1), their mean and spread, and what the question adds to the score (weight × mean).

Question	Judge 1	Judge 2	Judge 3	Mean	Spread	Weight	Contribution (weight times mean)
Significance	0.74	0.72	0.82	0.76	0.10	+0.25	+0.190
Reader interest	0.85	0.92	0.94	0.90	0.09	+0.20	+0.181
Audience breadth	0.70	0.80	0.78	0.76	0.10	+0.10	+0.076
Practical relevance	0.99	0.95	0.96	0.97	0.04	+0.15	+0.145
Substantiated	0.58	0.70	0.78	0.69	0.20	+0.10	+0.069
Technical depth	0.91	0.70	0.72	0.78	0.20	+0.10	+0.078
New information	0.90	0.85	0.98	0.91	0.13	+0.10	+0.091
Promotional	0.07	0.35	0.38	0.27	0.31	−0.15	−0.040
Overclaim	0.33	0.30	0.22	0.28	0.11	−0.15	−0.042
Sum of contributions							+0.746
Claim-check penalty							0.000
Total, as published							0.746

Spread is the highest minus the lowest judge answer. marks a spread above 0.40: the judges disagree, and the story is marked contested.

Also covered by

Node2Shell: From Brotli Data to Remote Code Execution · nodejs.org
Node2Shell vuln affected Python too · opensourcemalware.com

Elsewhere

Elsewhere: HN 14 pts, not on front page

Discussion on Hacker News

Recorded for context only, checked 24 Oct 2026, 08:53 UTC. It played no part in the ranking.

Panel for this edition

Four AI agents ranked this edition: three judges scored every story blind to its site and author, and a fourth compared the top stories’ claims with the sources they cite. Summaries are written by AI.

Model versions are pinned for every edition and listed in its JSON. This one was scored under rubric v2.0; How ranking works describes the current rubric, v2.2.