CVE-2026-75003

CRITICALNVD 9.89.8—
EchelonGraph scoreMEDIUM confidence

This critical-severity CVE scores 9.8 under NVD CVSS v3. EPSS exploit probability: 0.6% (45th percentile of EPSS-scored CVEs). GitHub Security Advisory enrichment pending alignment with NVD CVSS.

Triggered by: NVD CVSS baseline
Sources: epss, ghsa, nvd
Trending — 3 sources updated this week
9.8EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0.6%CVSS: 9.8Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

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.

CVSS v3
9.8
EG Score
9.8CRITICALmedium confidence
EG Risk
59
EG Risk 59/100CISA SSVC

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity98% × 45%
Exploitation1% × 40%
Automatability100% × 15%
CISA SSVC: Track at low or medium mission impact; Attend at high (mission-essential systems).
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
0.6%
EPSS %ILE
45th
KEV
Not listed

CISA SSVCTrack 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). Mission impact is CISA's Mission & Well-being decision point, and only you can judge it: high means the affected system is essential to your organisation's mission, or its compromise could cause irreversible harm to people. CISA's decision table

Published

August 17, 2026

Last Modified

September 10, 2026

Advisory Details (5)

Auto-updated Oct 1, 2026
Patch available. Sources: github_commit, github_release.
generic

Security updates 1.6.18 and 1.7.3 released

https://roundcube.net/news/2026/08/09/security-updates-1.6.18-and-1.7.3
github_release Patch Available

Roundcube Webmail 1.7.3

Patch available: roundcube/roundcubemail 1.7.3

https://github.com/roundcube/roundcubemail/releases/tag/1.7.3
github_release Patch Available

Roundcube Webmail 1.6.18

Patch available: roundcube/roundcubemail 1.6.18

https://github.com/roundcube/roundcubemail/releases/tag/1.6.18
github_commit

commit 440277c32e6d (roundcube/roundcubemail)

Fix landed in roundcube/roundcubemail commit 440277c32e6d — awaiting tagged release

https://github.com/roundcube/roundcubemail/commit/440277c32e6d84f3d116153af1cc8454361a8a56
github_commit

commit 1cebea034743 (roundcube/roundcubemail)

Fix landed in roundcube/roundcubemail commit 1cebea034743 — awaiting tagged release

https://github.com/roundcube/roundcubemail/commit/1cebea03474305d9f75a9a33d30880d290b5591b

Vendor 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)
PackageVulnerable rangeFix by version rangeDependents
roundcube1.6.1+dfsg-1 ... 1.6.5+dfsg-1~deb12u1 (18 versions)
  • every version up to 1.6.5+dfsg-1+deb12u11: fixed in 1.6.5+dfsg-1+deb12u11
—
Debian:13(1)
PackageVulnerable rangeFix by version rangeDependents
roundcube1.6.11+dfsg-1 ... 1.6.17+dfsg-1 (12 versions)
  • every version up to 1.6.18+dfsg-0+deb13u1: fixed in 1.6.18+dfsg-0+deb13u1
—
Debian:14(1)
PackageVulnerable rangeFix by version rangeDependents
roundcube1.6.11+dfsg-1 ... 1.6.17+dfsg-1 (7 versions)
  • every version up to 1.6.18+dfsg-1: fixed in 1.6.18+dfsg-1
—

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 35× in last 7d / 170× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. 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. Most recent first.

Showing the most recent 100 of 231 total refreshes for this CVE.

  1. 2026-10-05 06:40 UTCGHSA enrichment
  2. 2026-10-05 01:57 UTCEG score recompute
  3. 2026-10-05 01:57 UTCGHSA enrichment
  4. 2026-10-04 23:22 UTCEPSS rescore
  5. 2026-10-04 21:50 UTCGHSA enrichment
  6. 2026-10-04 16:24 UTCGHSA enrichment
  7. 2026-10-04 11:44 UTCGHSA enrichment
  8. 2026-10-04 07:07 UTCGHSA enrichment
  9. 2026-10-04 03:13 UTCGHSA enrichment
  10. 2026-10-03 17:50 UTCEG score recompute
  11. 2026-10-03 17:49 UTCGHSA enrichment
  12. 2026-10-03 14:26 UTCEPSS rescore
  13. 2026-10-03 00:45 UTCGHSA enrichment
  14. 2026-10-02 19:40 UTCEG score recompute
  15. 2026-10-02 19:40 UTCGHSA enrichment
  16. 2026-10-02 15:46 UTCGHSA enrichment
  17. 2026-10-02 06:58 UTCGHSA enrichment
  18. 2026-10-02 01:35 UTCEG score recompute
  19. 2026-10-02 01:35 UTCGHSA enrichment
  20. 2026-10-01 19:50 UTCEPSS rescore
  21. 2026-10-01 13:40 UTCGHSA enrichment
  22. 2026-10-01 09:45 UTCGHSA enrichment
  23. 2026-10-01 05:48 UTCGHSA enrichment
  24. 2026-10-01 01:30 UTCGHSA enrichment
  25. 2026-09-30 20:52 UTCEG score recompute
Show 75 more
  1. 2026-09-30 20:52 UTCGHSA enrichment
  2. 2026-09-30 10:03 UTCEG score recompute
  3. 2026-09-30 10:03 UTCGHSA enrichment
  4. 2026-09-29 15:24 UTCEPSS rescore
  5. 2026-09-29 06:18 UTCGHSA enrichment
  6. 2026-09-29 02:25 UTCGHSA enrichment
  7. 2026-09-28 21:59 UTCEG score recompute
  8. 2026-09-28 21:59 UTCGHSA enrichment
  9. 2026-09-28 13:52 UTCEPSS rescore
  10. 2026-09-28 13:46 UTCGHSA enrichment
  11. 2026-09-28 09:49 UTCGHSA enrichment
  12. 2026-09-28 05:55 UTCGHSA enrichment
  13. 2026-09-28 02:01 UTCGHSA enrichment
  14. 2026-09-27 21:43 UTCGHSA enrichment
  15. 2026-09-27 16:29 UTCEG score recompute
  16. 2026-09-27 16:29 UTCGHSA enrichment
  17. 2026-09-27 13:48 UTCEPSS rescore
  18. 2026-09-27 12:23 UTCGHSA enrichment
  19. 2026-09-27 08:17 UTCEG score recompute
  20. 2026-09-27 08:17 UTCGHSA enrichment
  21. 2026-09-26 15:59 UTCEPSS rescore
  22. 2026-09-26 00:28 UTCEPSS rescore
  23. 2026-09-25 09:57 UTCGHSA enrichment
  24. 2026-09-25 06:03 UTCGHSA enrichment
  25. 2026-09-25 02:09 UTCGHSA enrichment
  26. 2026-09-24 16:14 UTCEG score recompute
  27. 2026-09-24 16:14 UTCGHSA enrichment
  28. 2026-09-24 14:04 UTCEPSS rescore
  29. 2026-09-24 12:03 UTCGHSA enrichment
  30. 2026-09-24 08:09 UTCGHSA enrichment
  31. 2026-09-24 04:16 UTCGHSA enrichment
  32. 2026-09-24 00:21 UTCGHSA enrichment
  33. 2026-09-23 20:28 UTCEG score recompute
  34. 2026-09-23 20:28 UTCGHSA enrichment
  35. 2026-09-23 17:54 UTCEPSS rescore
  36. 2026-09-23 16:26 UTCGHSA enrichment
  37. 2026-09-23 12:25 UTCGHSA enrichment
  38. 2026-09-23 08:23 UTCGHSA enrichment
  39. 2026-09-23 04:29 UTCGHSA enrichment
  40. 2026-09-23 00:35 UTCGHSA enrichment
  41. 2026-09-22 20:41 UTCEG score recompute
  42. 2026-09-22 20:41 UTCGHSA enrichment
  43. 2026-09-22 16:01 UTCEPSS rescore
  44. 2026-09-22 14:14 UTCGHSA enrichment
  45. 2026-09-22 10:19 UTCGHSA enrichment
  46. 2026-09-22 06:26 UTCGHSA enrichment
  47. 2026-09-22 02:28 UTCGHSA enrichment
  48. 2026-09-21 22:34 UTCEG score recompute
  49. 2026-09-21 22:34 UTCGHSA enrichment
  50. 2026-09-21 21:09 UTCEPSS rescore
  51. 2026-09-21 18:40 UTCGHSA enrichment
  52. 2026-09-21 14:33 UTCGHSA enrichment
  53. 2026-09-21 10:29 UTCGHSA enrichment
  54. 2026-09-21 06:35 UTCGHSA enrichment
  55. 2026-09-21 02:42 UTCGHSA enrichment
  56. 2026-09-20 22:35 UTCEG score recompute
  57. 2026-09-20 22:35 UTCGHSA enrichment
  58. 2026-09-20 20:16 UTCEPSS rescore
  59. 2026-09-20 18:40 UTCGHSA enrichment
  60. 2026-09-20 14:15 UTCGHSA enrichment
  61. 2026-09-20 09:46 UTCGHSA enrichment
  62. 2026-09-20 02:49 UTCGHSA enrichment
  63. 2026-09-19 22:53 UTCGHSA enrichment
  64. 2026-09-19 18:49 UTCEG score recompute
  65. 2026-09-19 18:48 UTCGHSA enrichment
  66. 2026-09-19 14:53 UTCGHSA enrichment
  67. 2026-09-19 10:59 UTCGHSA enrichment
  68. 2026-09-19 05:45 UTCGHSA enrichment
  69. 2026-09-19 01:50 UTCGHSA enrichment
  70. 2026-09-18 21:56 UTCEG score recompute
  71. 2026-09-18 21:56 UTCGHSA enrichment
  72. 2026-09-18 19:28 UTCEPSS rescore
  73. 2026-09-18 17:29 UTCGHSA enrichment
  74. 2026-09-18 13:32 UTCGHSA enrichment
  75. 2026-09-18 09:38 UTCGHSA enrichment

Related CVEs(same product + same CWE)

Frequently asked(5)

What is CVE-2026-75003?
CVE-2026-75003 is a critical vulnerability published on August 17, 2026. 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.
When was CVE-2026-75003 disclosed?
CVE-2026-75003 was first published on August 17, 2026, with the most recent update on September 10, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-75003 actively exploited?
CVE-2026-75003 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.6% probability of exploitation in the next 30 days (45th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-75003?
CVE-2026-75003 has a CVSS v3 base score of 9.8 (NVD).
How do I remediate CVE-2026-75003?
A fix for CVE-2026-75003 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-75003 are linked in the Vendor Advisories panel on this page.

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