Critical 9.8Published Sep 16, 2016

CVE-2016-6303Integer overflow in the MDC2_Update function in crypto/mdc2/mdc2dgst.c in OpenSSL before 1.1.0 allows remote attackers to cause a denial of service (out-of-bounds write and application crash) or poss…

Updated under an hour ago (Nov 2, 2026, 12:10 AM ET)

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It affects nodejs node.js and 1 other product. Add what you run to find out whether that includes you.

No exploitation reported and no EPSS estimate yet.

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Integer overflow in the MDC2_Update function in crypto/mdc2/mdc2dgst.c in OpenSSL before 1.1.0 allows remote attackers to cause a denial of service (out-of-bounds write and application crash) or possibly have unspecified other impact via unknown vectors.

CVSS: 9.8 CRITICAL (v3.1, NVD)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Weakness (CWE): CWE-787
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: Not given
NVD analysis: Modified
Record last updated: Jun 16, 2026
First seen by InfoSec Signals: Nov 1, 2026

Affected products

Affected products

nodejs node.js nodejs:node.js	before 0.12.16; from 4.0.0 before 4.6.0; from 6.0.0 before 6.6.0	NVD
openssl openssl openssl:openssl	1.0.1; 1.0.1a; 1.0.1b; 1.0.1c; 1.0.1d; 1.0.1e; 1.0.1f; 1.0.1g; and 22 more ranges	NVD

References

References

http://kb.juniper.net/InfoCenter/index?page=content&id=JSA10759	third-party-advisory
http://www-01.ibm.com/support/docview.wss?uid=swg21995039	third-party-advisory
http://www.oracle.com/technetwork/security-advisory/cpuapr2018-3678067.html	patch, third-party-advisory
http://www.oracle.com/technetwork/security-advisory/cpujan2018-3236628.html	patch, third-party-advisory
http://www.oracle.com/technetwork/security-advisory/cpujul2017-3236622.html	patch, third-party-advisory
http://www.oracle.com/technetwork/security-advisory/cpuoct2016-2881722.html	patch, third-party-advisory
http://www.oracle.com/technetwork/security-advisory/cpuoct2017-3236626.html	patch, third-party-advisory
http://www.securityfocus.com/bid/92984	third-party-advisory, vdb-entry
http://www.securitytracker.com/id/1036885	third-party-advisory, vdb-entry
https://bto.bluecoat.com/security-advisory/sa132	third-party-advisory
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The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.