Reference page — cumulative record through Monday, October 19, 2026 UTC. Reference pages update as the archive grows; only dated daily editions are immutable pages of record.

CVE-2018-0735

CVE-2018-0735MEDIUM

OpenSSL OpenSSL — Timing attack against ECDSA signature generation

  AV  AC  PR  UI  S  C  I  A   CVSS    EPSS   %ile   KEV
   N   H   N   N  U  H  N  N    5.9   .0472   91.7     —

AFFECTED
  Product  Versions                                           Fixed
  OpenSSL  Fixed in OpenSSL 1.1.0j (Affected 1.1.0-1.1.0i) –  —

TIMELINE
  Nov 30  Reserved by openssl
  Oct 29  Published (CNA: openssl)
  Oct 8   ENRICHED — CVE-2018-0735 (OpenSSL). Received CVSS 5.9 and CPE data from NVD.

CWE-327 · CNA: openssl · CVSS v3.1 · 15 references · NVD status: Modified

Description

The OpenSSL ECDSA signature algorithm has been shown to be vulnerable to a timing side channel attack. An attacker could use variations in the signing algorithm to recover the private key. Fixed in OpenSSL 1.1.0j (Affected 1.1.0-1.1.0i). Fixed in OpenSSL 1.1.1a (Affected 1.1.1).

Lifecycle

Complete event history — 3 events, chronological
Date	Event	Detail
November 30, 2017	Reserved	Reserved by openssl
October 29, 2018	Published	Published (CNA: openssl)
October 8, 2026	ENRICHED	ENRICHED — CVE-2018-0735 (OpenSSL). Received CVSS 5.9 and CPE data from NVD.

Affected

Affected products and packages — 1 row
Vendor	Product / Package	Ecosystem	Version introduced	Fixed
OpenSSL	OpenSSL	—	Fixed in OpenSSL 1.1.0j (Affected 1.1.0-1.1.0i)	—

Weaknesses

CWE-327

References (15)

http://www.securityfocus.com/bid/105750 [Third Party Advisory, VDB Entry]
http://www.securitytracker.com/id/1041986 [Third Party Advisory, VDB Entry]
https://access.redhat.com/errata/RHSA-2019:3700 [Third Party Advisory]
https://git.openssl.org/gitweb/?p=openssl.git%3Ba=commitdiff%3Bh=56fb454d281a023b3f950d969693553d3f3ceea1
https://git.openssl.org/gitweb/?p=openssl.git%3Ba=commitdiff%3Bh=b1d6d55ece1c26fa2829e2b819b038d7b6d692b4
https://lists.debian.org/debian-lts-announce/2018/11/msg00024.html [Mailing List, Third Party Advisory]
https://nodejs.org/en/blog/vulnerability/november-2018-security-releases/ [Third Party Advisory]
https://security.netapp.com/advisory/ntap-20181105-0002/ [Third Party Advisory]
https://usn.ubuntu.com/3840-1/ [Third Party Advisory]
https://www.debian.org/security/2018/dsa-4348 [Third Party Advisory]
https://www.openssl.org/news/secadv/20181029.txt [Vendor Advisory]
https://www.oracle.com/security-alerts/cpujan2020.html [Third Party Advisory]
https://www.oracle.com/technetwork/security-advisory/cpuapr2019-5072813.html [Patch, Third Party Advisory]
https://www.oracle.com/technetwork/security-advisory/cpujan2019-5072801.html [Patch, Third Party Advisory]
https://www.oracle.com/technetwork/security-advisory/cpujul2019-5072835.html [Patch, Third Party Advisory]

Authoritative record: CVE-2018-0735 at cve.org

Vendors: openssl

Weaknesses: CWE-327

About this page

This is a reference page, not a dated page of record. It assembles the complete lifecycle of CVE-2018-0735 from the CVE Program record, NVD enrichment, the CISA KEV catalog, EPSS, and OSV advisories. The box score's numbers (CVSS, EPSS, KEV status) are current as of Monday, October 19, 2026 UTC and are re-derived as the archive grows; only dated daily editions are immutable pages of record. The authoritative source for this identifier is cve.org.