CVE•Published 2026-09-03•Modified 2026-09-09•0 articles on news•6 live references•NVD data
CVE-2026-53720
Vulnerability data via NVD (ingested)
CVSS v3.1
—
EPSS percentile
3
Exploit Prediction Scoring System · top 97% of all CVEs
Weaknesses (CWE)
Description
pymonocypher uses cython to wrap the Monocypher C library. Prior to version 4.0.2.8, the argon2i_32 implementation does not check the nb_blocks size. If the caller does not provide a sufficiently large buffer based on the API contract, then argon2i_32 will write past the end of the buffer and possibly corrupt the heap. This issue has been patched in version 4.0.2.8.
Timeline
Published 2026-09-03
Modified 2026-09-09
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).
More intel sources (5)
Shodan report
vuln:CVE-2026-53720Country / ASN / product breakdown for the vuln query.
Censys
vulnerabilities.cve_id: CVE-2026-53720Censys host search filtered to this CVE id.
grep.app
CVE-2026-53720Public source-code mentions — fast PoC discovery.
GitHub code
CVE-2026-53720GitHub code search for direct mentions.
Google dork
"CVE-2026-53720" exploit -site:nvd.nist.govWrite-ups and news, NVD excluded.
Known PoCs on GitHub
No public proof-of-concept repositories found for CVE-2026-53720 on GitHub.
We haven't classified any articles referencing CVE-2026-53720 yet. The external references above still apply.