What is the CVSS score of CVE-2024-27354?

CVE-2024-27354 has a CVSS 3.1 base score of 7.5 (High). CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H. EPSS exploitation probability: 0.2%.

Is there a public PoC exploit available for CVE-2024-27354?

Yes, a public proof-of-concept exploit is available for CVE-2024-27354. Prioritise patching immediately. EPSS: 0.2%.

Is there a patch available for CVE-2024-27354?

Yes, a patch is available for CVE-2024-27354. Update the affected software to the latest version immediately.

CVE-2024-27354

EUVD-2024-0936 HIGH

Uncontrolled Resource Consumption (CWE-400)

2026-05-06 https://github.com/phpseclib/phpseclib

GHSA-2528-jw5q-ww88

GHSA-hg35-mp25-qf6h

Denial Of Service

7.5

CVSS 3.1 · GitHub Advisory

Severity by source

GitHub Advisory PRIMARY

7.5 HIGH

AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Primary rating from GitHub Advisory · only source for this CVE.

CVSS VectorGitHub Advisory

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

None

Availability

High

Lifecycle Timeline

CVE Published

May 06, 2026 - 17:57 github-advisory

HIGH 7.5

DescriptionGitHub Advisory

Impact

Anyone trying to generate a prime and testing the primality of a number.

Patches

https://github.com/phpseclib/phpseclib/commit/ad5dbdf2129f5e0fb644637770b7f33de8ca8575

Workarounds

Using the GMP extension would probably help, assuming that one has its own guardrails.

Resources

https://github.com/phpseclib/phpseclib/commit/ad5dbdf2129f5e0fb644637770b7f33de8ca8575 https://www.usenix.org/system/files/conference/usenixsecurity25/sec25cycle1-prepub-599-shi-bing.pdf

AnalysisAI

Impact Anyone trying to generate a prime and testing the primality of a number. Rated high severity (CVSS 7.5), this vulnerability is remotely exploitable, no authentication required, low attack complexity. Public exploit code available.

Technical ContextAI

This vulnerability is classified as Uncontrolled Resource Consumption (CWE-400), which allows attackers to cause denial of service by exhausting system resources.

Impact Anyone trying to generate a prime and testing the primality of a number.

Patches https://github.com/phpseclib/phpseclib/commit/ad5dbdf2129f5e0fb644637770b7f33de8ca8575

Workarounds Using the GMP extension would probably help, assuming that one has its own guardrails.

Resources https://github.com/phpseclib/phpseclib/commit/ad5dbdf2129f5e0fb644637770b7f33de8ca8575 https://www.usenix.org/system/files/conference/usenixsecurity25/sec25cycle1-prepub-599-shi-bing.pdf

RemediationAI

A vendor patch is available. Apply the latest security update as soon as possible. Implement rate limiting, set resource quotas, validate input sizes, use timeouts.