THREATOPS

THREAT OPS › Threat News › [NVD] CVE-2026-27459 (CRITICAL 9.8) — pyOpenSSL is a Python wrapper around the OpenSSL library. Starting in version 22.0.0 and prior to version 26.0.0, if a user provided callback to `set_cookie_generate_callback` returned a cookie value greater than 256 bytes, pyOpenSSL would overflow an OpenSSL provided buffer. Sta

[NVD] CVE-2026-27459 (CRITICAL 9.8) — pyOpenSSL is a Python wrapper around the OpenSSL library. Starting in version 22.0.0 and prior to version 26.0.0, if a user provided callback to `set_cookie_generate_callback` returned a cookie value greater than 256 bytes, pyOpenSSL would overflow an OpenSSL provided buffer. Sta

lownvdPublished 2026-03-18

CVE-2026-27459 CVSS: 9.8 CRITICAL Published: 2026-03-18T00:16:19.273

pyOpenSSL is a Python wrapper around the OpenSSL library. Starting in version 22.0.0 and prior to version 26.0.0, if a user provided callback to `set_cookie_generate_callback` returned a cookie value greater than 256 bytes, pyOpenSSL would overflow an OpenSSL provided buffer. Starting in version 26.0.0, cookie values that are to

Indicators of compromise

CVE-2026-27459cve

Original source: https://nvd.nist.gov/vuln/detail/CVE-2026-27459