Reference page — cumulative record through Sunday, October 4, 2026 UTC. Reference pages update as the archive grows; only dated daily editions are immutable pages of record.

CVE-2026-75003

CVE-2026-75003CRITICAL

Roundcube Webmail — In Roundcube Webmail before 1.6.18 and 1.7.x before 1.7.3, an unclosed url() in a FuncIRI attribute of an SVG image could evade the remot…

  AV  AC  PR  UI  S  C  I  A   CVSS    EPSS   %ile   KEV
   N   L   N   N  U  H  H  H    9.8   .0058   45.6     —

AFFECTED
  Product  Versions  Fixed
  Webmail  1.6.0 –   —

TIMELINE
  Aug 17  Reserved by mitre
  Aug 17  Published (CNA: mitre)
  Sep 10  RESCORED — CVE-2026-75003 (Roundcube Webmail). CVSS 5.8 → 9.8 (NVD).

CWE-669 · CNA: mitre · CVSS v3.1 · 5 references · NVD status: Analyzed

Description

In Roundcube Webmail before 1.6.18 and 1.7.x before 1.7.3, an unclosed url() in a FuncIRI attribute of an SVG image could evade the remote image blocking, which may lead to information disclosure or privilege escalation.

Lifecycle

Complete event history — 3 events, chronological
Date	Event	Detail
August 17, 2026	Reserved	Reserved by mitre
August 17, 2026	Published	Published (CNA: mitre)
September 10, 2026	RESCORED	RESCORED — CVE-2026-75003 (Roundcube Webmail). CVSS 5.8 → 9.8 (NVD).

Affected

Affected products and packages — 1 row
Vendor	Product / Package	Ecosystem	Version introduced	Fixed
Roundcube	Webmail	—	1.6.0	—

Weaknesses

CWE-669

References (5)

https://github.com/roundcube/roundcubemail/commit/1cebea03474305d9f75a9a33d30880d290b5591b [Patch]
https://github.com/roundcube/roundcubemail/commit/440277c32e6d84f3d116153af1cc8454361a8a56 [Patch]
https://github.com/roundcube/roundcubemail/releases/tag/1.6.18 [Release Notes]
https://github.com/roundcube/roundcubemail/releases/tag/1.7.3 [Release Notes]
https://roundcube.net/news/2026/08/09/security-updates-1.6.18-and-1.7.3 [Vendor Advisory]

Authoritative record: CVE-2026-75003 at cve.org

Vendors: roundcube

Weaknesses: CWE-669

About this page

This is a reference page, not a dated page of record. It assembles the complete lifecycle of CVE-2026-75003 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 Sunday, October 4, 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.