CVE•Published 2026-03-30•Modified 2026-04-13•1 article on news•6 live references•NVD data
CVE-2026-32877Botan_project · Botan
Vulnerability data via NVD (ingested)
CVSS v3.1
8.2
HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H
EPSS percentile
—
Weaknesses (CWE)
Description
Botan is a C++ cryptography library. From version 2.3.0 to before version 3.11.0, during SM2 decryption, the code that checked the authentication code value (C3) failed to check that the encoded value was of the expected length prior to comparison. An invalid ciphertext can cause a heap over-read of up to 31 bytes, resulting in a crash or potentially other undefined behavior. This issue has been patched in version 3.11.0.
Timeline
Published 2026-03-30
Modified 2026-04-13
External references
Search for exposed instances
Shodan + Censys queries derived from NVD's CPE data. The vuln tag catches assets Shodan has explicitly linked to this CVE; the product / banner fingerprints find exposed instances even when the vuln tag was never applied (which is common).
Shodan · vuln tag0 hosts
vuln:CVE-2026-32877Hosts Shodan has explicitly fingerprinted as vulnerable.
Shodan · product
product:"Botan Project Botan"All exposed Botan Project Botan instances — cross-reference with the CVE's affected-version range.
Shodan · banner/body mention
http.html:"Botan"HTTP body or banner mentions "Botan" — catches deploys Shodan didn't identify as a product.
More intel sources (5)
Shodan report
vuln:CVE-2026-32877Country / ASN / product breakdown for the vuln query.
Censys
vulnerabilities.cve_id: CVE-2026-32877Censys host search filtered to this CVE id.
grep.app
CVE-2026-32877Public source-code mentions — fast PoC discovery.
GitHub code
CVE-2026-32877GitHub code search for direct mentions.
Google dork
"CVE-2026-32877" exploit -site:nvd.nist.govWrite-ups and news, NVD excluded.
Known PoCs on GitHub
No public proof-of-concept repositories found for CVE-2026-32877 on GitHub.