TI-2026-32147 Aliases CVE-2026-44167 GHSA-3qpq-r242-jqj7

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

LOW 38CWE-400Published 2026-05-12 · Updated 2026-05-14

Key facts

Attack vector: Network
Privileges required: None
User interaction: None
Attack complexity: Low
Impact type: Denial of service
Confidentiality · integrity · availability: None · None · High
Fix status: Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA and GitHub. Impact type from CWE-400.

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV

EPSS 0.00201 10th percentileScored 2026-11-07

Fix Fixed phpseclib (phpseclib): 3.0.52, 2.0.54, 1.0.29phpseclib/phpseclib (Packagist): 1.0.29, 2.0.54, 3.0.52

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: None
Automatable: Yes
Technical impact: Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
phpseclib	phpseclib	3.0.0 to before 3.0.52; 2.0.0 to before 2.0.54; 0.1.1 to before 1.0.29	3.0.52, 2.0.54, 1.0.29	Patch available	CNA
—	phpseclib/phpseclib (Packagist)	0.1.1 to before 1.0.29	1.0.29	Patch available	GHSA-3qpq-r242-jqj7
—	phpseclib/phpseclib (Packagist)	2.0.0 to before 2.0.54	2.0.54	Patch available	GHSA-3qpq-r242-jqj7
—	phpseclib/phpseclib (Packagist)	3.0.0 to before 3.0.52	3.0.52	Patch available	GHSA-3qpq-r242-jqj7

phpseclib Vendorphpseclib Affected 3.0.0 to before 3.0.52; 2.0.0 to before 2.0.54; 0.1.1 to before 1.0.29 Fixed in 3.0.52, 2.0.54, 1.0.29 Patch available CNA
phpseclib/phpseclib (Packagist) Vendor— Affected 0.1.1 to before 1.0.29 Fixed in 1.0.29 Patch available GHSA-3qpq-r242-jqj7
phpseclib/phpseclib (Packagist) Vendor— Affected 2.0.0 to before 2.0.54 Fixed in 2.0.54 Patch available GHSA-3qpq-r242-jqj7
phpseclib/phpseclib (Packagist) Vendor— Affected 3.0.0 to before 3.0.52 Fixed in 3.0.52 Patch available GHSA-3qpq-r242-jqj7

CPE names Threatist (inferred) · 1

Inferred from how NVD named this product before; not given by a source.

CPE	Versions	Role	Vendor
cpe:2.3:a:phpseclib:phpseclib::::::::	—	—	phpseclib

cpe:2.3:a:phpseclib:phpseclib:*:*:*:*:*:*:*:* Versions — — ·phpseclib

Remediation

Fix · CNA phpseclib (phpseclib) Fixed in 3.0.52, 2.0.54, 1.0.29
Fix · GHSA-3qpq-r242-jqj7 phpseclib/phpseclib (Packagist) Fixed in 1.0.29 Advisory →
Fix · GHSA-3qpq-r242-jqj7 phpseclib/phpseclib (Packagist) Fixed in 2.0.54 Advisory →
Fix · GHSA-3qpq-r242-jqj7 phpseclib/phpseclib (Packagist) Fixed in 3.0.52 Advisory →

Vendor assessments

Red Hat

Red Hat's page for this CVE →

Not affected: 1 product

Red Hat

Timeline

2026-10-02 Threatist record created from CVE-2026-44167
2026-10-03 Alias added: GHSA-3qpq-r242-jqj7

References

Advisory 1

https://nvd.nist.gov/vuln/detail/CVE-2026-44167

Other 3

TI-2026-40135 Server-side request forgery in phpseclib CVSS 3.1MEDIUM 5.8
TI-2026-57943 phpseclib — non-constant-time X25519 scalar multiplication permits full private-key recovery CVSS 3.1MEDIUM 6.3
TI-2026-29008 phpseclib has a variable-time HMAC comparison in SSH2::get_binary_packet() using != instead of hash_equals() CVSS 3.1LOW 3.7
TI-2023-29213 In phpseclib before 1.0.22, 2.x before 2.0.46, and 3.x before 3.0.33, some characters in… CVSS 3.1HIGH 7.5
TI-2024-18192 An issue was discovered in phpseclib 1.x before 1.0.23, 2.x before 2.0.47, and 3.x before… CVSS 3.1HIGH 7.5
TI-2024-18191 An issue was discovered in phpseclib 1.x before 1.0.23, 2.x before 2.0.47, and 3.x before… CVSS 3.1HIGH 7.5

See all 10 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences