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Vulnerability record · CVE-2016-1494 · published 13 January 2016

CVE-2016-1494: Python rsa improper input validation vulnerability

Python · Rsa

The verify function in the RSA package for Python (Python-RSA) before 3.3 allows attackers to spoof signatures with a small public exponent via crafted signature padding, aka a BERserk attack.

5.3 CVSS 3.0 Medium EPSS 7.1% · top 6.0% CWE-20 · Improper input validation
5.3CVSS 3.0 base score, v2 5.0
7.1%EPSS exploitation probability, 30 days
NoNot in CISA KEV
4Affected product versions listed by NVD
16References, 2 tagged exploit
17 Jun 2026Last modified by NVD

Description

The verify function in the RSA package for Python (Python-RSA) before 3.3 allows attackers to spoof signatures with a small public exponent via crafted signature padding, aka a BERserk attack.

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N

Affected products

4 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
http://lists.fedoraproject.org/pipermail/package-announce/2016-January/175897.html Third Party Advisory
http://lists.fedoraproject.org/pipermail/package-announce/2016-January/175942.html Third Party Advisory
http://lists.opensuse.org/opensuse-updates/2016-01/msg00032.html Mailing ListThird Party Advisory
http://www.openwall.com/lists/oss-security/2016/01/05/1 Mailing ListThird Party Advisory
http://www.openwall.com/lists/oss-security/2016/01/05/3 Mailing ListThird Party Advisory
http://www.securityfocus.com/bid/79829 Third Party AdvisoryVDB Entry
https://bitbucket.org/sybren/python-rsa/pull-requests/14/security-fix-bb06-attack-in-verify-by/diff PatchThird Party Advisory
https://blog.filippo.io/bleichenbacher-06-signature-forgery-in-python-rsa/ ExploitThird Party Advisory
http://lists.fedoraproject.org/pipermail/package-announce/2016-January/175897.html Third Party Advisory
http://lists.fedoraproject.org/pipermail/package-announce/2016-January/175942.html Third Party Advisory
http://lists.opensuse.org/opensuse-updates/2016-01/msg00032.html Mailing ListThird Party Advisory
http://www.openwall.com/lists/oss-security/2016/01/05/1 Mailing ListThird Party Advisory
http://www.openwall.com/lists/oss-security/2016/01/05/3 Mailing ListThird Party Advisory
http://www.securityfocus.com/bid/79829 Third Party AdvisoryVDB Entry
https://bitbucket.org/sybren/python-rsa/pull-requests/14/security-fix-bb06-attack-in-verify-by/diff PatchThird Party Advisory
https://blog.filippo.io/bleichenbacher-06-signature-forgery-in-python-rsa/ ExploitThird Party Advisory

Track CVE-2016-1494 inside VULONE

Watch it alongside the ransomware crews, C2 infrastructure and forum chatter that reference it, query it through the API and pull it into your SIEM over TAXII.

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Source: NIST National Vulnerability Database (record CVE-2016-1494), CISA KEV, FIRST EPSS (scores of 2026-09-28). This page is refreshed as NVD updates the record.