CVE-2026-74999

MEDIUMPre-NVD 5.45.4—
EchelonGraph scoreMEDIUM confidence

Score 5.4 from GitHub Security Advisory published 2026-08-17. A secondary CVSS source baseline 5.4; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 3 sources updated this week
5.4EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0.3%CVSS: 5.4Exploit: 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, the "Add to address book" action was subject to stored XSS.

CVSS v3
5.4
EG Score
5.4MEDIUMmedium confidence
EG Risk
24
EG Risk 24/100CISA 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
Severity54% × 45%
Exploitation0% × 40%
Automatability0% × 15%
CISA SSVC: Track at every mission impact level.
Action: A fix is available. Apply it within your standard update timelines.
EPSS PROB
0.3%
EPSS %ILE
21st
KEV
Not listed

CISA SSVCTrack at every mission impact level.

A fix is available. Apply it within your standard update timelines.

Exploitation none (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact partial (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 8, 2026

Advisory Details (5)

Auto-updated Aug 17, 2026
Patch available. Sources: github_release, github_commit.
github_commit

commit 2d2a9604a820 (roundcube/roundcubemail)

Fix landed in roundcube/roundcubemail commit 2d2a9604a820 — awaiting tagged release

https://github.com/roundcube/roundcubemail/commit/2d2a9604a820ee279c9ffcfe856b9b93a93995a8
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_commit

commit 32f20c6bfd12 (roundcube/roundcubemail)

Fix landed in roundcube/roundcubemail commit 32f20c6bfd12 — awaiting tagged release

https://github.com/roundcube/roundcubemail/commit/32f20c6bfd12dff9cfb6880ae303e740f0804fe8
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
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

Vendor Advisories for CVE-2026-74999(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 14× in last 7d / 76× 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 134 total refreshes for this CVE.

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

Related CVEs(same product + same CWE)

Frequently asked(5)

What is CVE-2026-74999?
CVE-2026-74999 is a medium vulnerability published on August 17, 2026. In Roundcube Webmail before 1.6.18 and 1.7.x before 1.7.3, the "Add to address book" action was subject to stored XSS.
When was CVE-2026-74999 disclosed?
CVE-2026-74999 was first published on August 17, 2026, with the most recent update on September 8, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-74999 actively exploited?
CVE-2026-74999 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.3% probability of exploitation in the next 30 days (21st percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-74999?
CVE-2026-74999 has a CVSS base score of 5.4 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-74999?
A fix for CVE-2026-74999 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-74999 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

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