VYPR
High severityNVD Advisory· Published Apr 24, 2023· Updated Feb 13, 2025

Laminas Diactoros vulnerable to HTTP Multiline Header Termination

CVE-2023-29530

Description

Laminas Diactoros provides PSR HTTP Message implementations. In versions 2.18.0 and prior, 2.19.0, 2.20.0, 2.21.0, 2.22.0, 2.23.0, 2.24.0, and 2.25.0, users who create HTTP requests or responses using laminas/laminas-diactoros, when providing a newline at the start or end of a header key or value, can cause an invalid message. This can lead to denial of service vectors or application errors. The problem has been patched in following versions 2.18.1, 2.19.1, 2.20.1, 2.21.1, 2.22.1, 2.23.1, 2.24.1, and 2.25.1. As a workaround, validate HTTP header keys and/or values, and if using user-supplied values, filter them to strip off leading or trailing newline characters before calling withHeader().

AI Insight

LLM-synthesized narrative grounded in this CVE's description and references.

Affected packages

Versions sourced from the GitHub Security Advisory.

PackageAffected versionsPatched versions
laminas/laminas-diactorosPackagist
< 2.18.12.18.1
laminas/laminas-diactorosPackagist
>= 2.19.0, < 2.19.12.19.1
laminas/laminas-diactorosPackagist
>= 2.20.0, < 2.20.12.20.1
laminas/laminas-diactorosPackagist
>= 2.21.0, < 2.21.12.21.1
laminas/laminas-diactorosPackagist
>= 2.22.0, < 2.22.12.22.1
laminas/laminas-diactorosPackagist
>= 2.23.0, < 2.23.12.23.1
laminas/laminas-diactorosPackagist
>= 2.24.0, < 2.24.22.24.2
laminas/laminas-diactorosPackagist
>= 2.25.0, < 2.25.22.25.2

Affected products

2

Patches

Vulnerability mechanics

Generated on May 9, 2026. Inputs: CWE entries + fix-commit diffs from this CVE's patches. Citations validated against bundle.

References

7

News mentions

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