Is phpseclib/phpseclib affected by CVE-2026-40194?

Packagist phpseclib/phpseclib is affected in >=0.1.1 =2.0.0 =3.0.0 <3.0.51.

Is CVE-2026-40194 being exploited?

Not on the CISA KEV list. EPSS exploit probability is 0.3%.

low

CVE-2026-40194

Q: Is CVE-2026-40194 being exploited?

Not on the CISA KEV list. EPSS exploit probability is 0.3%.

Packagist · phpseclib/phpseclib

Summary

phpseclib has a variable-time HMAC comparison in SSH2::get_binary_packet() using != instead of hash_equals()

Severity: low
EPSS: 0.3% (p25)
Also known as: GHSA-r854-jrxh-36qx
Published: 2026-04-10

References

Related advisories

CVE-2023-49316 — high · Packagist/phpseclib/phpseclib
CVE-2024-27355 — high · Packagist/phpseclib/phpseclib
CVE-2024-27354 — high · Packagist/phpseclib/phpseclib
CVE-2026-44167 — high · Packagist/phpseclib/phpseclib
CVE-2026-32935 — high · Packagist/phpseclib/phpseclib
CVE-2023-52892 — high · Packagist/phpseclib/phpseclib
GHSA-m557-wrgg-6rp4 — medium · Packagist/phpseclib/phpseclib

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Sources: CISA KEV (public domain), OSV.dev & GitHub Advisory Database (CC-BY-4.0), FIRST EPSS, NVD/CWE (public domain). Served live from the Stateward advisory database.