PT-2026-29124 · Botan · Botan

Harutokimura · Published 2026-03-30 · Updated 2026-03-31 · CVE-2026-32877

Positive Technologies (AI Summary)

CVSS v2.0

8.5

High

Base vector

AV:N/AC:L/Au:N/C:P/I:N/A:C

Name of the Vulnerable Software and Affected Versions Botan versions 2.3.0 through 3.10.9

Description Botan is a C++ cryptography library. During SM2 decryption, the code that checks the authentication code value (C3) does not verify the encoded value's length before comparison. This can lead to a heap over-read of up to 31 bytes from an invalid ciphertext, potentially causing a crash or undefined behavior.

Recommendations Update to version 3.11.0 or later.

Exploit

Fix

Out of bounds Read

Weakness Enumeration

CWE-125

Related Identifiers

BDU:2026-07567

CVE-2026-32877

GHSA-7JJ6-4R42-W9H6

Affected Products

Botan

References · 14

• 🔥 https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/32xxx/CVE-2026-32877.json · Exploit
• https://github.com/randombit/botan/security/advisories/GHSA-7jj6-4r42-w9h6 · Vendor Advisory
• https://ubuntu.com/security/CVE-2026-32877 · Vendor Advisory
• https://bdu.fstec.ru/vul/2026-07567 · Security Note
• https://osv.dev/vulnerability/DEBIAN-CVE-2026-32877 · Vendor Advisory
• https://security-tracker.debian.org/tracker/CVE-2026-32877 · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2026-32877 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-32877 · Security Note
• https://cve.org/CVERecord?id=CVE-2026-32877 · Security Note
• https://osv.dev/vulnerability/UBUNTU-CVE-2026-32877 · Vendor Advisory
• https://cybersecurity-help.cz/vdb/vulns/125381 · Note
• https://twitter.com/CVEnew/status/2038916079867859224 · Twitter Post
• https://twitter.com/cyberbivash/status/2038733904190832990 · Twitter Post
• https://twitter.com/TheHackerWire/status/2038743059618492597 · Twitter Post