IO::Compress::Brotli Out-of-Bounds Write

IO::Compress::Brotli

IO::Compress::Brotli versions from 0.004001 before 0.023 for Perl bundle a brotli library with an out-of-bounds write in the decoder.

First seen: 23 Oct 2026
Last update: 23 Oct 2026, 22:29 UTC
Fixed in: 0.023
Identifiers: CVE-2026-115936
Source: news

Check this repository for exposure to one security incident from pwned.coffee. Report first, change nothing until I say so.

## IO::Compress::Brotli Out-of-Bounds Write
Severity: high. Patch status: patched.
Affected: IO::Compress::Brotli
Fixed in: 0.023
Ids: CVE-2026-115936

IO::Compress::Brotli versions from 0.004001 before 0.023 for Perl bundle a brotli library with an out-of-bounds write in the decoder.

## Steps
1. Search the repo, its CI and infra config for IO::Compress::Brotli. If present, report the version in use and whether it's affected.

## Report
A table: file, product or package, version in use, affected yes/no, exact fix. Then anything a human has to check outside the repo.

If you have the pwned.coffee MCP server (https://pwned.coffee/mcp), call lookup_cve("CVE-2026-115936") for the latest, and check_repo with this repo's lockfiles, Dockerfiles and workflows for a full receipt.
Sources: https://seclists.org/oss-sec/2026/q4/367
https://pwned.coffee/i/io-compress-brotli-out-of-bounds-write-cve-2026-115936

Sources

seclists.org: CVE-2026-115936: IO::Compress::Brotli versions from 0.004001 before 0.023 for Perl bundle a brotli library with an out-of-bounds write in the decoder

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