EXPOSURES › CVE-2026-27459
CVE-2026-27459
CRITICAL
DETAIL
SourceNVD · cve
Published2026-03-18
CVSS9.8
Referencehttps://nvd.nist.gov/vuln/detail/CVE-2026-27459 ↗
SHAME 35/100
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
▸ RECOMMENDED ACTION Critical severity — schedule patching of the affected products.
PLAYERS IMPLICATED
DESCRIPTION
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 too long are now rejected.
AFFECTED FEDRAMP PRODUCTS · 0
No correlated FedRAMP products.