CRLF Injection Affecting predis/predis package, versions >=3.0.0-RC1, <3.3.0
Threat Intelligence
Snyk has a proof-of-concept or detailed explanation of how to exploit this vulnerability.
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-PHP-PREDISPREDIS-20158914
- published27 Sept 2026
- disclosed8 Sept 2026
- creditPiotr Hałas
Introduced: 8 Sep 2026
CVE-2026-84372 (opens in a new tab)How to fix?
Upgrade predis/predis to version 3.3.0 or higher.
Overview
Affected versions of this package are vulnerable to CRLF Injection in AbstractAggregateConnection::write() in src/Connection/AbstractAggregateConnection.php, which re-parses the already serialized pipeline buffer by splitting on \r\n and rebuilding chunks through Command::deserializeCommand() for routing, disregarding the $<len> bulk length prefixes that define where a RESP argument ends. An attacker can inject Redis commands of their choosing into the connection, reaching FLUSHDB, DEL, SET, and GET on cluster connections and an uncaught UnexpectedValueException on replication connections, by placing \r\n and a RESP encoded command inside any value that reaches a pipelined argument, such as a URL slug used as a cache key. This requires the application to call pipeline() on an aggregate connection, so single node connections and the transaction() path are unaffected.