---
title: "CVE-2026-84372: Predis: Redis command injection and denial of service via CRLF smuggling in pipelined commands on aggregate connections"
url: https://erroneo.us/security/cve/CVE-2026-84372/
description: "CVE-2026-84372 (predis/predis (Composer (PHP))): Predis is a flexible and feature-complete Redis and Valkey client for PHP. From version 3.0.0-RC1 until…"
type: vulnerability-record
section: "Security Digest"
date_published: 2026-09-01
date_modified: 2026-09-08
publisher: erroneo.us
author: erroneo.us Security Desk
cve: "CVE-2026-84372"
kev: false
cvss: 9.8
epss: 0.00726
license: All rights reserved. Quote with attribution and a link.
---

# CVE-2026-84372: Predis: Redis command injection and denial of service via CRLF smuggling in pipelined commands on aggregate connections

**Signal:** Critical and remotely reachable. No known exploitation yet, but it is network-reachable without credentials. (Computed from CISA KEV, EPSS and CVSS; not an editorial verdict.)

## Should you act?

- Not in CISA KEV , but CISA’s SSVC assessment records a public proof-of-concept, so attack code exists.
- EPSS 0.7% , percentile 54: FIRST’s model estimates a 0.7% chance of exploitation activity in the next 30 days, higher than 54% of all scored CVEs (moderate). EPSS is a probability, not a verdict.
- Remotely reachable with no login and no user interaction. If the vulnerable service is exposed to the internet, prioritize it.
- Only applies if your dependency tree includes predis/predis (Composer (PHP)) >= 3.0.0-RC1, < 3.3.0, fixed in 3.3.0 . Check your lockfile, including transitive dependencies.

## What it is

Predis is a flexible and feature-complete Redis and Valkey client for PHP. From version 3.0.0-RC1 until version 3.3.0, pipeline handling on aggregate cluster and replication connections reparses an already serialized RESP buffer in AbstractAggregateConnection::write() by splitting it with explode("\r\n") instead of honoring RESP length prefixes. Attacker-controlled keys or values containing CRLF sequences can therefore be interpreted by Command::deserializeCommand() as additional commands. On cluster connections, ClusterStrategy::getFakeKey() can route injected keyless commands using the literal fake key value "key", permitting operations such as shard-wide cache deletion, targeted data modification, data reads, or node disruption. On replication connections, malformed reparsing can throw an uncaught exception and repeatedly terminate affected requests. Only pipeline() reaches this vulnerable path; transaction() and MULTI are not affected. This issue is fixed in version 3.3.0.

## Affected packages

- Composer (PHP) `predis/predis` >= 3.0.0-RC1, < 3.3.0 → fixed: 3.3.0

## Affected products (CVE record)

- predis predis: >= 3.0.0-RC1, < 3.3.0

## Severity

- GitHub_M CVSS 3.1: 9.8 `CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H`
- GitHub CVSS 3.1: 9.8 `CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H`

## Exploitation

- CISA KEV: not listed (no confirmed in-the-wild exploitation known to CISA).
- CISA SSVC assessment: exploitation poc , automatable yes , technical impact total .
- FIRST EPSS (model of 2026-10-21): 0.73% probability of exploitation activity in the next 30 days; percentile 54.

## Sources

- [GitHub Advisory GHSA-w6f5-v2h6-g786](https://github.com/advisories/GHSA-w6f5-v2h6-g786)
- [CVE.org record CVE-2026-84372](https://www.cve.org/CVERecord?id=CVE-2026-84372)
- [NVD entry CVE-2026-84372](https://nvd.nist.gov/vuln/detail/CVE-2026-84372)
- [github.com](https://github.com/predis/predis/security/advisories/GHSA-w6f5-v2h6-g786)
- [github.com](https://github.com/predis/predis/issues/1574)
- [github.com](https://github.com/predis/predis/pull/1586)
- [github.com](https://github.com/predis/predis/commit/053cb4b6ac7fb1f469ead96a78d059bc0458e408)
- [github.com](https://github.com/predis/predis/releases/tag/v3.3.0)

---
Source page: https://erroneo.us/security/cve/CVE-2026-84372/ · Security Digest: https://erroneo.us/security/ · More: https://erroneo.us/llms.txt