7.5

CVE-2026-44167: phpseclib Uncontrolled Resource Consumption

CVSS: 7.5v3.1HighDeferred
AliasesUBUNTU-CVE-2026-44167DEBIAN-CVE-2026-44167CGA-6xc3-32vh-73xx
Published 12-05-2026Last modified 14-05-2026
Open JSON

Vulnerability summary

CVE-2026-44167 is a high (CVSS 7.5) Uncontrolled Resource Consumption vulnerability in phpseclib. EPSS estimates a 0.34% chance of exploitation in the next 30 days, higher than 25.8% of scored vulnerabilities.

Overall risk
30/100
0100
Medium · default modelHow is this calculated?
CVSS score
7.5/10
010
High · v3.1 (CVE.org)
EPSS score
0.34%
0%100%
Low · +0.14 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 1 · Related 2
USN-8830-1CGA-C3F5-5Q37-CMQ9

Timeline

  1. 12-05-2026
    PublishedVulnerability first disclosed.
  2. 14-05-2026
    Last modifiedVulnerability information updated.

Description

phpseclib is a PHP secure communications library. Prior to 1.0.29, 2.0.54, and 3.0.52, anyone loading untrusted ASN1 files (eg. X509 certificates, RSA PKCS8 private or public keys, etc). This is a bypass of CVE-2024-27355. This vulnerability is fixed in 1.0.29, 2.0.54, and 3.0.52.

CVSS metrics

6 scores · 6 sources · 1 version

EPSS trend

Probability

0.34%

Chance of exploitation in the next 30 days

Percentile

26%

Versus all other CVEs

30-day change

+0.14 pp

From 0.20% on 21-09-2026

21-09-202621-10-2026
EPSS score
0.34%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Debian3 products
  • php-phpseclib< 2.0.42-1+deb12u5 | < 2.0.48-3+deb13u3 | < 2.0.54-1
  • php-phpseclib3< 3.0.19-1+deb12u6 | < 3.0.43-2+deb13u3 | < 3.0.52-1
  • phpseclib< 1.0.20-1+deb12u5 | < 1.0.23-6+deb13u3
Ubuntu3 products
  • php-phpseclib< 2.0.1-1ubuntu0.1~esm1 | < 2.0.9-1ubuntu0.1~esm3 | < 2.0.23-2ubuntu0.1~esm3 | < 2.0.36-1ubuntu0.1~esm3 | < 2.0.47-1ubuntu0.1~esm1 | All versions (No fix recorded) | < 2.0.51-1ubuntu0.1~esm1
  • php-phpseclib3All versions (No fix recorded)
  • phpseclibAll versions (No fix recorded)
Chainguard2 products
  • nextcloud-server-31All versions (No fix recorded)
  • nextcloud-server-33< 33.0.3-r1
Phpseclib1 product
  • phpseclib≥ 3.0.0, < 3.0.52 | ≥ 2.0.0, < 2.0.54 | ≥ 0.1.1, < 1.0.29
Wolfi1 product
  • nextcloud-server-33< 33.0.3-r1

5 vendors · 10 products

References

8 links