CVE-2026-75003

CRITICALNVD 9.89.8—
EchelonGraph scoreMEDIUM confidence

This critical-severity CVE scores 9.8 under NVD CVSS v3. EPSS exploit probability: 0.4%, top 67% of all CVEs by exploit prediction. 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%CVSS: 9.8Exploit: None knownExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

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
9.8(medium)
EG Risk
59(Track)
EG Risk 59/100SSVC: Track

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%
Exploitation0% × 40%
Automatability100% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
33%
KEV
Not listed

Published

August 17, 2026

Last Modified

September 10, 2026

Advisory Details (5)

Auto-updated Sep 17, 2026
Patch available. Sources: github_release, github_commit.
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 rangeFixed inDependents
roundcube1.6.1+dfsg-1 ... 1.6.5+dfsg-1~deb12u1 (18 versions)1.6.5+dfsg-1+deb12u11—
Debian:13(1)
PackageVulnerable rangeFixed inDependents
roundcube1.6.11+dfsg-1 ... 1.6.17+dfsg-1 (12 versions)1.6.18+dfsg-0+deb13u1—
Debian:14(1)
PackageVulnerable rangeFixed inDependents
roundcube1.6.11+dfsg-1 ... 1.6.17+dfsg-1 (7 versions)1.6.18+dfsg-1—

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 52× in last 7d / 123× 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 139 total refreshes for this CVE.

  1. 2026-09-19 05:45 UTCGHSA enrichment
  2. 2026-09-19 01:50 UTCGHSA enrichment
  3. 2026-09-18 21:56 UTCEG score recompute
  4. 2026-09-18 21:56 UTCGHSA enrichment
  5. 2026-09-18 19:28 UTCEPSS rescore
  6. 2026-09-18 17:29 UTCGHSA enrichment
  7. 2026-09-18 13:32 UTCGHSA enrichment
  8. 2026-09-18 09:38 UTCGHSA enrichment
  9. 2026-09-18 05:44 UTCGHSA enrichment
  10. 2026-09-18 01:50 UTCGHSA enrichment
  11. 2026-09-17 21:56 UTCEG score recompute
  12. 2026-09-17 21:56 UTCGHSA enrichment
  13. 2026-09-17 15:42 UTCGHSA enrichment
  14. 2026-09-17 11:45 UTCGHSA enrichment
  15. 2026-09-17 07:49 UTCGHSA enrichment
  16. 2026-09-17 03:44 UTCGHSA enrichment
  17. 2026-09-16 23:09 UTCGHSA enrichment
  18. 2026-09-16 15:17 UTCEG score recompute
  19. 2026-09-16 15:17 UTCGHSA enrichment
  20. 2026-09-16 14:08 UTCEPSS rescore
  21. 2026-09-16 10:15 UTCEG score recompute
  22. 2026-09-16 10:15 UTCGHSA enrichment
  23. 2026-09-16 05:15 UTCEPSS rescore
  24. 2026-09-16 04:55 UTCGHSA enrichment
  25. 2026-09-16 00:02 UTCGHSA enrichment
Show 75 more
  1. 2026-09-15 19:59 UTCGHSA enrichment
  2. 2026-09-15 15:54 UTCGHSA enrichment
  3. 2026-09-15 12:00 UTCGHSA enrichment
  4. 2026-09-15 08:07 UTCGHSA enrichment
  5. 2026-09-15 04:12 UTCEG score recompute
  6. 2026-09-15 04:12 UTCGHSA enrichment
  7. 2026-09-15 03:12 UTCEPSS rescore
  8. 2026-09-15 00:10 UTCGHSA enrichment
  9. 2026-09-14 19:55 UTCGHSA enrichment
  10. 2026-09-14 15:48 UTCGHSA enrichment
  11. 2026-09-14 11:54 UTCGHSA enrichment
  12. 2026-09-14 08:00 UTCGHSA enrichment
  13. 2026-09-14 04:06 UTCGHSA enrichment
  14. 2026-09-14 00:13 UTCGHSA enrichment
  15. 2026-09-13 20:19 UTCEG score recompute
  16. 2026-09-13 20:19 UTCGHSA enrichment
  17. 2026-09-13 16:25 UTCGHSA enrichment
  18. 2026-09-13 12:31 UTCGHSA enrichment
  19. 2026-09-13 08:37 UTCGHSA enrichment
  20. 2026-09-13 04:43 UTCGHSA enrichment
  21. 2026-09-13 00:49 UTCGHSA enrichment
  22. 2026-09-12 20:55 UTCGHSA enrichment
  23. 2026-09-12 17:01 UTCEG score recompute
  24. 2026-09-12 17:01 UTCGHSA enrichment
  25. 2026-09-12 15:02 UTCEPSS rescore
  26. 2026-09-12 13:08 UTCGHSA enrichment
  27. 2026-09-12 09:14 UTCGHSA enrichment
  28. 2026-09-12 05:20 UTCGHSA enrichment
  29. 2026-09-12 01:26 UTCGHSA enrichment
  30. 2026-09-11 21:32 UTCGHSA enrichment
  31. 2026-09-11 17:38 UTCEG score recompute
  32. 2026-09-11 17:38 UTCGHSA enrichment
  33. 2026-09-11 14:53 UTCEPSS rescore
  34. 2026-09-11 13:20 UTCEG score recompute
  35. 2026-09-11 13:20 UTCGHSA enrichment
  36. 2026-09-11 08:31 UTCGHSA enrichment
  37. 2026-09-11 04:37 UTCGHSA enrichment
  38. 2026-09-11 00:43 UTCGHSA enrichment
  39. 2026-09-10 19:22 UTCEG score recompute▲ 4.00
  40. 2026-09-10 19:22 UTCGHSA enrichment
  41. 2026-09-10 19:21 UTCNVD updateCVSS v3 → 9.8 · severity → CRITICAL
  42. 2026-09-10 09:35 UTCEPSS rescore
  43. 2026-09-10 07:49 UTCGHSA enrichment
  44. 2026-09-09 06:47 UTCEG score recompute
  45. 2026-09-09 06:47 UTCGHSA enrichment
  46. 2026-09-08 22:01 UTCEPSS rescore
  47. 2026-09-08 05:45 UTCEG score recompute
  48. 2026-09-08 05:45 UTCGHSA enrichment
  49. 2026-09-07 04:43 UTCEG score recompute
  50. 2026-09-07 04:43 UTCGHSA enrichment
  51. 2026-09-06 13:48 UTCEPSS rescore
  52. 2026-09-06 01:24 UTCEG score recompute
  53. 2026-09-06 01:24 UTCGHSA enrichment
  54. 2026-09-05 00:23 UTCEG score recompute
  55. 2026-09-05 00:23 UTCGHSA enrichment
  56. 2026-09-04 05:07 UTCEPSS rescore
  57. 2026-09-03 23:19 UTCGHSA enrichment
  58. 2026-09-02 22:14 UTCEG score recompute
  59. 2026-09-02 22:13 UTCGHSA enrichment
  60. 2026-09-02 14:12 UTCEPSS rescore
  61. 2026-09-01 21:10 UTCEG score recompute
  62. 2026-09-01 21:10 UTCGHSA enrichment
  63. 2026-09-01 13:54 UTCEPSS rescore
  64. 2026-09-01 04:40 UTCEPSS rescore
  65. 2026-09-01 04:40 UTCEPSS rescore
  66. 2026-08-31 20:58 UTCEG score recompute
  67. 2026-08-31 20:58 UTCGHSA enrichment
  68. 2026-08-30 19:18 UTCEPSS rescore
  69. 2026-08-30 19:17 UTCEPSS rescore
  70. 2026-08-30 17:19 UTCEG score recompute
  71. 2026-08-30 17:19 UTCGHSA enrichment
  72. 2026-08-30 01:22 UTCEPSS rescore
  73. 2026-08-29 16:18 UTCEG score recompute
  74. 2026-08-29 16:17 UTCGHSA enrichment
  75. 2026-08-28 21:42 UTCEPSS rescore

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 in the National Vulnerability Database 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% probability of exploitation in the next 30 days, which ranks it in the top 66.6% of all 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?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-75003, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

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