Vulnerability in phpseclib/phpseclib (CVE-2026-44167)
Summary
Vulnerability in phpseclib/phpseclib (CVE-2026-44167). Risk of unauthorized operations or information disclosure. Mitigation: upgrade to 1.0.29 or later.
Original description
The description as published by the source.
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.
Source: GitHub Security Advisories (Global) NVD GitHub Advisory
Auto-generated summary
Assembled by SecPulse from the source data (CVSS, CWE, affected versions) using templates — no AI involved. Check the original description and references below for exact details.
A vulnerability tracked as CVE-2026-44167 has been found in phpseclib/phpseclib.
Risk of unauthorized operations or information disclosure. CVSS score: 7.5/10.
What to do: upgrade phpseclib/phpseclib to 1.0.29 or later.
If unsure, ask your IT team or search "phpseclib/phpseclib CVE-2026-44167" on the vendor's site.
CVE-2026-44167 (phpseclib/phpseclib) — CWE-400 / CVSS v3 7.5
Attack vector: remote (network-reachable) / unauthenticated / no user interaction
Patched: 1.0.29 — apply immediately
Plan: 1) Audit SBOM/dependencies, 2) Stage→prod upgrade, 3) Add WAF/proxy monitoring on affected endpoints, 4) Hunt IOCs in logs.
Refs: see the GHSA / vendor advisory / patched release linked on this page.
A vulnerability (CWE-400) exists in phpseclib/phpseclib.
Check the vendor advisory for the affected versions of phpseclib/phpseclib.
Severity: High (CVSS 7.5/10). Risk of unauthorized operations or information disclosure.
Update to 1.0.29.
Until the patch is applied: disable the affected feature, apply WAF rules, or restrict access via network ACLs.
Search webserver/proxy logs for unusual request patterns matching this CVE's known IOCs. Run grep -r 'phpseclib/phpseclib' . against your dependency files (package-lock.json, requirements.txt, go.sum) to find affected services.
Response actions
Concrete steps and command examples for SOC/SRE teams to execute in order
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1Identify exposure identify
grep -r 'phpseclib/phpseclib' . | grep -v node_modulesリポジトリと本番環境の依存ファイル (package-lock.json / requirements.txt / go.sum / Gemfile.lock 等) で
phpseclib/phpseclibを grep し、稼働しているサービス・バージョンを把握する。 -
2Apply patch patch
Upgrade phpseclib/phpseclib to 1.0.29ステージング環境で 1.0.29 に上げて回帰テスト → 本番反映。回帰テストはアプリの主要ハッピーパスを含めること。
-
3Post-deployment verification verify
Confirm patched version is live in productionパッチ適用後、ステージングで PoC または同等の悪用パターンを再現して脆弱性が閉じたことを確認。本番ではアクセスログ・WAF でアラート再発が無いか継続監視。
Affected packages
Fix status by distribution
Fixed packages published by each distribution for this CVE
- Debian DEBIAN-CVE-2026-44167 php-phpseclib
- Ubuntu UBUNTU-CVE-2026-44167 php-phpseclib Fixed in: 2.0.1-1ubuntu0.1~esm1
References
- advisory github.com
- advisory nvd.nist.gov
- advisory github.com
- package github.com
- patch github.com
- web github.com