CVE-2026-118765 Botan - Weak Cryptography

Botan 3.7.0 to 3.13.0 contains a weak random number generator seeding caused by calling AutoSeeded_RNG::clear() followed by randomize with an empty buffer while unseeded, letting attackers predict RNG output, exploit requires unseeded RNG state.

CVSS base score 7.3 /10
High
CISA KEV
Not listed
Public exploit
None known
Authentication
Required
EPSS
0.14% chance of exploitation in 30 days
View the NVD record ↗

Details

Type
Weak Cryptography
Impact
Information Disclosure
CVSS vector
CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Published
29 October 2026
Updated
31 October 2026
Weakness
CWE-335

Vendor fix

Update to version 3.13.0 or later.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

References

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