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.
CVE-2026-75003
“—” beside the score: it is equal to NVD's CVSS score.
This critical-severity CVE scores 9.8 under NVD CVSS v3. EPSS exploit probability: 0.4% (34th percentile of EPSS-scored CVEs). GitHub Security Advisory CVSS 5.8 is lower than this score; a lower GitHub score revises it only when its advisory is newer than the CVE record's last change, and this advisory (published 2026-08-17) is not newer than that change (2026-09-10), so it does not.
Also known asEUVD-2026-60169 (ENISA EUVD) · GHSA-mh9g-rh94-w7mh (GitHub Security Advisories)Source: ENISA EUVD
- High severity, but no confirmed exploitation yet
A fix is available — apply it.
- CVSS v3
- 9.8
- EG Score
- 9.8CRITICALmedium confidence
- EG Risk
- 59EG Risk 59/100
EG Risk is EchelonGraph's 0–100 priority score. It fuses impact severity (EG Severity, the CVSS base score, never the KEV-floored or EPSS-lifted EG Score) with real-world exploitation and automatability, under weights EchelonGraph set by hand, so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner.
How it’s computed (value × EchelonGraph’s weight)Severity98% × 45%Impact severity (EG Severity): CVSS 9.8 of 10. Never the KEV-floored or EPSS-lifted EG Score.Exploitation0.6% × 40%FIRST EPSS: the 30-day exploitation probability when EchelonGraph scored this CVE.Automatability100% × 15%CISA's SSVC Automatable value: yes (Vulnrichment).SSVC (CISA's decision table, applied by EchelonGraph): Track at low or medium mission impact; Attend at high (mission-essential systems).Exploitation none (CISA Vulnrichment) · Automatable yes (CISA Vulnrichment) · Technical impact total (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE.Action: A fix is available. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high. - EPSS PROB
- 0.4%
- EPSS %ILE
- 34th
- KEV
- Not listed
What the EG score is made of (scorer v4.0: the three questions the 0–10 score mixes, published apart · methodology)
The EG score (9.8): severity, escalated by confirmed exploitation. This CVE's 9.8 is its impact severity (EG Severity), not escalated.
- EG Severity
- 9.8 CRITICALCVSS-B, impact only: no KEV listing, EPSS or EG-KEV tier raises it.NVD CVSS v3 · CVSS v3.0 or v3.1
- EG Likelihood
- 0.4% within 30 daysSource: FIRST EPSS. FIRST's exploitation probability, not an EchelonGraph model.
- Confirmed exploitation
- None on record (CISA KEV, EG-KEV Tier 1)Reported apart from the likelihood: an observed fact, not a probability.
- EG Priority
- SSVC Track at medium mission impactTrack at low or medium mission impact; Attend at high (mission-essential systems).CISA BOD 26-04: 3 days if the affected system is publicly exposed; 60 days if it is not.Each input and its source, and whom BOD 26-04 binds: the SSVC and BOD 26-04 blocks below.
SSVC (CISA's decision table, applied by EchelonGraph)Track at low or medium mission impact; Attend at high (mission-essential systems).
A fix is available. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high.
Exploitation none (CISA Vulnrichment) · Automatable yes (CISA Vulnrichment) · Technical impact total (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE. Mission impact is CISA's Mission & Well-being decision point, and only you can judge it. CISA's table makes it high when Mission Prevalence is Essential — the vulnerable component "directly provides capabilities that constitute at least one MEF for at least one entity" (MEF: mission essential function) — or when Public Well-Being Impact is Irreversible: "multiple fatalities are likely", the cyber-physical system "is likely lost or destroyed", "extreme or serious externalities" are imposed on other parties, or social systems such as elections or the financial grid "are destabilized and potentially collapse". CISA's decision table
BOD 26-04 (CISA's remediation timeline, Table 1)3 days if the affected system is publicly exposed; 60 days if it is not.
The score's inputs: In CISA KEV no (CISA's KEV catalog) · Automatable yes (CISA Vulnrichment) · Technical impact total (CISA Vulnrichment). Whether your system is publicly exposed is yours to answer. BOD 26-04 binds US Federal Civilian Executive Branch agencies; for anyone else it is CISA's published timeline, a reference rather than an obligation. The directive · how EchelonGraph applies it
Published
August 17, 2026
Last Modified
September 10, 2026
Advisory Details (5)
Auto-updated Oct 31, 2026Security updates 1.6.18 and 1.7.3 released
https://roundcube.net/news/2026/08/09/security-updates-1.6.18-and-1.7.3Roundcube Webmail 1.7.3
Patch available: roundcube/roundcubemail 1.7.3
https://github.com/roundcube/roundcubemail/releases/tag/1.7.3Roundcube Webmail 1.6.18
Patch available: roundcube/roundcubemail 1.6.18
https://github.com/roundcube/roundcubemail/releases/tag/1.6.18commit 440277c32e6d (roundcube/roundcubemail)
Fix landed in roundcube/roundcubemail commit 440277c32e6d — awaiting tagged release
https://github.com/roundcube/roundcubemail/commit/440277c32e6d84f3d116153af1cc8454361a8a56commit 1cebea034743 (roundcube/roundcubemail)
Fix landed in roundcube/roundcubemail commit 1cebea034743 — awaiting tagged release
https://github.com/roundcube/roundcubemail/commit/1cebea03474305d9f75a9a33d30880d290b5591bVendor Advisories for CVE-2026-75003(1)
These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.
Affected Packages
(3 across 3 ecosystems)
Debian:12(1)
| Package | Vulnerable range | Fix by version range | Dependents |
|---|---|---|---|
| roundcube | 1.6.1+dfsg-1 ... 1.6.5+dfsg-1~deb12u1 (18 versions) |
| — |
Debian:13(1)
| Package | Vulnerable range | Fix by version range | Dependents |
|---|---|---|---|
| roundcube | 1.6.11+dfsg-1 ... 1.6.17+dfsg-1 (12 versions) |
| — |
Debian:14(1)
| Package | Vulnerable range | Fix by version range | Dependents |
|---|---|---|---|
| roundcube | 1.6.11+dfsg-1 ... 1.6.17+dfsg-1 (7 versions) |
| — |
Weakness Classification(1)
MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.
Data Freshness Timeline
(refreshed 19× in last 7d / 94× in last 30d)
Each row is a time one of our pipelines fetched, updated or re-scored this CVE. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. An arrow marks a change the record states ("CVSS v3 → 9.1"); EPSS and GHSA rows show the values recorded at that time, not what changed (EPSS values are rounded; hover one for the exact figures). Most recent first.
Showing the most recent 100 of 318 refreshes on record for this CVE.
A repeat, a row identical to one the same pipeline wrote less than 10 seconds earlier, is not a separate refresh and is not counted. None are among the latest 100 rows. The 218 oldest rows on record are not shown and were not checked, so the counts can still include repeats.
- 2026-11-02 16:46 UTCEPSS rescoreEPSS 0.4% · 34th percentile
- 2026-11-02 15:10 UTCEG score recompute
- 2026-11-02 15:10 UTCGHSA enrichmentGHSA-mh9g-rh94-w7mh · GitHub severity MODERATE · GitHub CVSS 5.8
- 2026-11-01 16:35 UTCEPSS rescoreEPSS 0.6% · 47th percentile
- 2026-11-01 14:09 UTCEG score recompute
- 2026-11-01 14:09 UTCGHSA enrichmentGHSA-mh9g-rh94-w7mh · GitHub severity MODERATE · GitHub CVSS 5.8
- 2026-10-31 16:33 UTCEPSS rescoreEPSS 0.6% · 47th percentile
- 2026-10-31 13:06 UTCEG score recompute
- 2026-10-31 13:06 UTCGHSA enrichmentGHSA-mh9g-rh94-w7mh · GitHub CVSS 5.8
- 2026-10-30 16:35 UTCEPSS rescoreEPSS 0.6% · 47th percentile
- 2026-10-30 12:02 UTCEG score recompute
- 2026-10-30 12:02 UTCGHSA enrichmentGHSA-mh9g-rh94-w7mh · GitHub CVSS 5.8
- 2026-10-29 16:34 UTCEPSS rescoreEPSS 0.6% · 47th percentile
- 2026-10-29 11:01 UTCEG score recompute
- 2026-10-29 11:00 UTCGHSA enrichmentGHSA-mh9g-rh94-w7mh · GitHub CVSS 5.8
- 2026-10-28 16:33 UTCEPSS rescoreEPSS 0.6% · 47th percentile
- 2026-10-28 09:47 UTCEG score recompute
- 2026-10-28 09:47 UTCGHSA enrichmentGHSA-mh9g-rh94-w7mh · GitHub CVSS 5.8
- 2026-10-27 16:32 UTCEPSS rescoreEPSS 0.6% · 47th percentile
- 2026-10-27 07:55 UTCEG score recompute
- 2026-10-27 07:54 UTCGHSA enrichmentGHSA-mh9g-rh94-w7mh · GitHub CVSS 5.8
- 2026-10-26 16:32 UTCEPSS rescoreEPSS 0.6% · 47th percentile
- 2026-10-26 04:18 UTCEG score recompute
- 2026-10-26 04:17 UTCGHSA enrichmentGHSA-mh9g-rh94-w7mh · GitHub CVSS 5.8
- 2026-10-25 16:34 UTCEPSS rescoreEPSS 0.6% · 47th percentile
Show 75 moreShow fewer
- 2026-10-25 14:03 UTCEG score recompute
- 2026-10-25 03:13 UTCEG score recompute
- 2026-10-25 03:13 UTCGHSA enrichmentGHSA-mh9g-rh94-w7mh · GitHub CVSS 5.8
- 2026-10-24 16:33 UTCEPSS rescoreEPSS 0.6% · 46th percentile
- 2026-10-24 02:11 UTCEG score recompute
- 2026-10-24 02:11 UTCGHSA enrichmentGHSA-mh9g-rh94-w7mh · GitHub CVSS 5.8
- 2026-10-23 16:32 UTCEPSS rescoreEPSS 0.6% · 46th percentile
- 2026-10-23 01:08 UTCEG score recompute
- 2026-10-23 01:08 UTCGHSA enrichmentGHSA-mh9g-rh94-w7mh · GitHub CVSS 5.8
- 2026-10-22 16:35 UTCEPSS rescoreEPSS 0.6% · 46th percentile
- 2026-10-22 00:04 UTCEG score recompute
- 2026-10-22 00:03 UTCGHSA enrichmentGHSA-mh9g-rh94-w7mh · GitHub CVSS 5.8
- 2026-10-21 16:33 UTCEPSS rescoreEPSS 0.6% · 46th percentile
- 2026-10-20 23:00 UTCEG score recompute
- 2026-10-20 23:00 UTCGHSA enrichmentGHSA-mh9g-rh94-w7mh · GitHub CVSS 5.8
- 2026-10-20 16:33 UTCEPSS rescoreEPSS 0.6% · 46th percentile
- 2026-10-19 21:58 UTCEG score recompute
- 2026-10-19 21:58 UTCGHSA enrichmentGHSA-mh9g-rh94-w7mh · GitHub CVSS 5.8
- 2026-10-19 16:33 UTCEPSS rescoreEPSS 0.6% · 46th percentile
- 2026-10-18 20:47 UTCEG score recompute
- 2026-10-18 20:47 UTCGHSA enrichmentGHSA-mh9g-rh94-w7mh · GitHub CVSS 5.8
- 2026-10-18 16:32 UTCEPSS rescoreEPSS 0.6% · 46th percentile
- 2026-10-18 03:13 UTCEG score recompute
- 2026-10-17 19:28 UTCEG score recompute
- 2026-10-17 19:28 UTCGHSA enrichmentGHSA-mh9g-rh94-w7mh · GitHub CVSS 5.8
- 2026-10-17 16:35 UTCEPSS rescoreEPSS 0.6% · 46th percentile
- 2026-10-16 18:23 UTCEG score recompute
- 2026-10-16 18:23 UTCGHSA enrichmentGHSA-mh9g-rh94-w7mh · GitHub CVSS 5.8
- 2026-10-16 16:44 UTCEPSS rescoreEPSS 0.6% · 46th percentile
- 2026-10-15 16:32 UTCEPSS rescoreEPSS 0.6% · 46th percentile
- 2026-10-15 14:50 UTCEG score recompute
- 2026-10-15 14:50 UTCGHSA enrichmentGHSA-mh9g-rh94-w7mh · GitHub CVSS 5.8
- 2026-10-14 16:33 UTCEPSS rescoreEPSS 0.6% · 46th percentile
- 2026-10-14 09:19 UTCEG score recompute
- 2026-10-14 09:19 UTCGHSA enrichmentGHSA-mh9g-rh94-w7mh · GitHub CVSS 5.8
- 2026-10-13 16:35 UTCEPSS rescoreEPSS 0.6% · 46th percentile
- 2026-10-13 06:41 UTCEG score recompute
- 2026-10-13 06:40 UTCGHSA enrichmentGHSA-mh9g-rh94-w7mh · GitHub CVSS 5.8
- 2026-10-12 16:35 UTCEPSS rescoreEPSS 0.6% · 46th percentile
- 2026-10-12 15:39 UTCEG score recompute
- 2026-10-12 05:36 UTCGHSA enrichmentGHSA-mh9g-rh94-w7mh · GitHub CVSS 5.8
- 2026-10-11 19:25 UTCEG score recompute
- 2026-10-11 16:41 UTCEG score recompute
- 2026-10-11 14:00 UTCEG score recompute
- 2026-10-11 13:49 UTCEPSS rescoreEPSS 0.6% · 45th percentile
- 2026-10-10 20:00 UTCEPSS rescoreEPSS 0.6% · 45th percentile
- 2026-10-09 20:07 UTCEPSS rescoreEPSS 0.6% · 45th percentile
- 2026-10-08 17:13 UTCEPSS rescoreEPSS 0.6% · 45th percentile
- 2026-10-07 23:48 UTCEPSS rescoreEPSS 0.6% · 45th percentile
- 2026-10-07 11:27 UTCGHSA enrichmentGHSA-mh9g-rh94-w7mh · GitHub CVSS 5.8
- 2026-10-07 06:10 UTCGHSA enrichmentGHSA-mh9g-rh94-w7mh · GitHub CVSS 5.8
- 2026-10-07 02:16 UTCGHSA enrichmentGHSA-mh9g-rh94-w7mh · GitHub CVSS 5.8
- 2026-10-06 21:46 UTCGHSA enrichmentGHSA-mh9g-rh94-w7mh · GitHub CVSS 5.8
- 2026-10-06 17:10 UTCEG score recompute
- 2026-10-06 17:10 UTCGHSA enrichmentGHSA-mh9g-rh94-w7mh · GitHub CVSS 5.8
- 2026-10-06 15:18 UTCEPSS rescoreEPSS 0.6% · 45th percentile
- 2026-10-06 12:58 UTCGHSA enrichmentGHSA-mh9g-rh94-w7mh · GitHub CVSS 5.8
- 2026-10-06 09:03 UTCEG score recompute
- 2026-10-06 09:03 UTCGHSA enrichmentGHSA-mh9g-rh94-w7mh · GitHub CVSS 5.8
- 2026-10-05 17:43 UTCEPSS rescoreEPSS 0.6% · 45th percentile
- 2026-10-05 17:25 UTCGHSA enrichmentGHSA-mh9g-rh94-w7mh · GitHub CVSS 5.8
- 2026-10-05 11:54 UTCGHSA enrichmentGHSA-mh9g-rh94-w7mh · GitHub CVSS 5.8
- 2026-10-05 06:40 UTCGHSA enrichmentGHSA-mh9g-rh94-w7mh · GitHub CVSS 5.8
- 2026-10-05 01:57 UTCEG score recompute
- 2026-10-05 01:57 UTCGHSA enrichmentGHSA-mh9g-rh94-w7mh · GitHub CVSS 5.8
- 2026-10-04 23:22 UTCEPSS rescoreEPSS 0.6% · 45th percentile
- 2026-10-04 21:50 UTCGHSA enrichmentGHSA-mh9g-rh94-w7mh · GitHub CVSS 5.8
- 2026-10-04 16:24 UTCGHSA enrichmentGHSA-mh9g-rh94-w7mh · GitHub CVSS 5.8
- 2026-10-04 11:44 UTCGHSA enrichmentGHSA-mh9g-rh94-w7mh · GitHub CVSS 5.8
- 2026-10-04 07:07 UTCGHSA enrichmentGHSA-mh9g-rh94-w7mh · GitHub CVSS 5.8
- 2026-10-04 03:13 UTCGHSA enrichmentGHSA-mh9g-rh94-w7mh · GitHub CVSS 5.8
- 2026-10-03 17:50 UTCEG score recompute
- 2026-10-03 17:49 UTCGHSA enrichmentGHSA-mh9g-rh94-w7mh · GitHub CVSS 5.8
- 2026-10-03 14:26 UTCEPSS rescoreEPSS 0.6% · 45th percentile
- 2026-10-03 00:45 UTCGHSA enrichmentGHSA-mh9g-rh94-w7mh · GitHub CVSS 5.8
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Frequently asked(5)
What is CVE-2026-75003?
When was the CVE record for CVE-2026-75003 published?
Is CVE-2026-75003 actively exploited?
What is the CVSS score of CVE-2026-75003?
How do I remediate CVE-2026-75003?
Dependency Blast Radius
See which npm, PyPI, Go, and Maven packages are affected by CVE-2026-75003
Is Your Infrastructure Affected by CVE-2026-75003?
EchelonGraph automatically scans your cloud infrastructure and maps CVE exposure using blast radius analysis.