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Fencer Vulns
high 7.5

CVE-2026-44167 json

phpseclib: CVE-2024-27355 mitigation bypass — OID amplification DoS in ASN1::decodeOID()

published 2026-05-05 6 mo ago modified 2026-09-10 1 mo ago also EUVD-2026-29724 , GHSA-3qpq-r242-jqj7

cvss
7.5
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.2%
EPSS 0.2% chance of exploitation in 30 days, percentile 9%
public exploits
0
none known

Summary

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.

Patch / fix

  • packagist phpseclib/phpseclib 1.0.29, 2.0.54, 3.0.52
  • phpseclib phpseclib 1.0.29, 2.0.54, 3.0.52
  • phpseclib Debian 12 1.0.20-1+deb12u5
  • phpseclib Debian 13 1.0.23-6+deb13u3
  • php-phpseclib Debian 12 2.0.42-1+deb12u5
  • php-phpseclib Debian 13 2.0.48-3+deb13u3
  • php-phpseclib Debian 14 2.0.54-1
  • php-phpseclib3 Debian 12 3.0.19-1+deb12u6
  • php-phpseclib3 Debian 13 3.0.43-2+deb13u3
  • php-phpseclib3 Debian 14 3.0.52-1

debian advisories DEBIAN-CVE-2026-44167

  • php-phpseclib Ubuntu Pro 16.04 LTS 2.0.1-1ubuntu0.1~esm1
  • php-phpseclib Ubuntu Pro 18.04 LTS 2.0.9-1ubuntu0.1~esm3
  • php-phpseclib Ubuntu Pro 20.04 LTS 2.0.23-2ubuntu0.1~esm3
  • php-phpseclib Ubuntu Pro 22.04 LTS 2.0.36-1ubuntu0.1~esm3
  • php-phpseclib Ubuntu Pro 24.04 LTS 2.0.47-1ubuntu0.1~esm1
  • php-phpseclib Ubuntu Pro 26.04 LTS 2.0.51-1ubuntu0.1~esm1

ubuntu advisories UBUNTU-CVE-2026-44167

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2026-44167 updated cvss 7.5

phpseclib: phpseclib: Denial of Service via untrusted ASN.1 file loading

  • Red Hat All currently supported Red Hat products
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation
none
Automatable
yes
Technical impact
partial
Assessed
5 mo ago

Exploit prediction

0.20% chance of exploitation in the next 30 days, higher than 9% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
GitHub 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Affected packages

ecosystem package affected fixed in
packagist phpseclib/phpseclib
>=0.1.1, <1.0.29
>=2.0.0, <2.0.54
>=3.0.0, <3.0.52
1.0.29
2.0.54
3.0.52

Affected products

  • phpseclib phpseclib

Classification

Weakness
  • CWE-400 Uncontrolled Resource Consumption

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

CPEs and fixed versions use Anchore's correction of NVD's data: Added CPE configurations because not yet analyzed by NVD.