CVE-2024-27355: phpseclib guardrails needed on OID length

CVE-2024-27355 · Severity: low · CVSS 3.1 · Published 2026-05-08

phpseclib guardrails needed on OID length

Technologies: phpseclib/phpseclib (Packagist). Vendors: Packagist.

Quick answers

Is CVE-2024-27355 exploited in the wild?
No. Junglewise Threat Intelligence has no report of CVE-2024-27355 being exploited in the wild.
How severe is CVE-2024-27355?
Low severity, with a CVSS score of 3.1, published 8 May 2026.
Which products and versions are affected?
phpseclib/phpseclib (Packagist) ECOSYSTEM:introduced=2.0.0,fixed=2.0.47.
Is there a fix for CVE-2024-27355?
Yes. phpseclib/phpseclib (Packagist): upgrade to 2.0.47 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
Am I affected by CVE-2024-27355?
Check whether you run phpseclib/phpseclib (Packagist) at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

How to fix

  • phpseclib/phpseclib (Packagist): upgrade to 2.0.47 or later
    composer require phpseclib/phpseclib:^2.0.47

Affected products

  • phpseclib/phpseclib (Packagist) ECOSYSTEM:introduced=2.0.0,fixed=2.0.47

Identifiers

  • CVE-2024-27355
  • GHSA-f2qx-66wf-wvvx

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