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CVE-2023-49316

20
FAUCET Score

CVE-2023-49316 is a denial-of-service vulnerability affecting phpseclib versions prior to 3.0.34, specifically within the Math/BinaryField.php component. This vulnerability is rated as High severity (CVSS 7.5), indicating it can be exploited remotely with low complexity and without user interaction, leading to a complete denial of service. There is currently no evidence of active exploitation, publicly available exploit code, or significant community discussion surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
>= 3.0.0, < 3.0.34CPE matchmatch criteria
cpe:2.3:a:phpseclib:phpseclib:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

7.5HIGH

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 Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
3.6
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.78%
Probability of exploitation in next 30 days
EPSS Percentile
52.3%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0078 is in the 28th percentile among its peer group of 51,551 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (2)

composerpatch availablevia ghsa
Product: phpseclib/phpseclibFixed in: 3.0.34
github_advisorypatch availablevia nvd_reference
View patch

Vendor Advisories (2)

composerGHSA-2f25-pfq3-c7h8high

Phpseclib needs guardrails on large binaryfield integers

May 8, 2026
composerGHSA-jpr7-q523-hx25high

Duplicate Advisory: phpseclib vulnerable to denial of service

Nov 27, 2023

References

github.com / phpseclib/phpseclib/commit/964d78101a70305df33f442f5490f0adb3b7e77f
Patch
github.com / phpseclib/phpseclib/releases/tag/3.0.34
Release Notes