CVE-2026-8496

MEDIUMNVD 6.16.1—
EchelonGraph scoreMEDIUM confidence

Score 6.1 from GitHub Security Advisory published 2026-05-13. NVD baseline CVSS 6.1; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
6.1EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 6.1Exploit: None knownExposed: 0

A fix is available — apply it.

A cross-site scripting (XSS) vulnerability exists in Alinto SOGo, version 5.12.7. A maliciously crafted ICS calendar invitation files allows arbitrary JavaScript execution within the authenticated SOGo webmail session. The issue occurs because SVG content embedded in the description field of an ICS file, with an onrepeat event handler, is insufficiently sanitized before being rendered in the webmail interface. A remote attacker can execute JavaScript in the victim's browser when the malicious calendar invite is viewed. Successful exploitation may allow mailbox access, email and contact theft, session hijacking, and other actions allowed by an authenticated user.

CVSS v3
6.1
EG Score
6.1(medium)
EG Risk
28(Track)
EG Risk 28/100SSVC: 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
Severity61% × 45%
Exploitation0% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
36%
KEV
Not listed

Published

May 13, 2026

Last Modified

August 6, 2026

Advisory Details (3)

Auto-updated Jun 16, 2026
Patch available. Sources: github_commit, github_release.
generic

SOGo v5.12.8 released

https://www.sogo.nu/news/2026/sogo-v5128-released.html
github_release Patch Available

SOGo v5.12.8

Patch available: Alinto/sogo SOGo-5.12.8

https://github.com/Alinto/sogo/releases/tag/SOGo-5.12.8
github_commit Patch Available

commit 67ce01ec2a1a (Alinto/sogo)

Patch available: Alinto/sogo SOGo-5.12.8 (contains commit 67ce01ec2a1a)

https://github.com/Alinto/sogo/commit/67ce01ec2a1a7854d8e9f615dd65afb949043e86

Vendor Advisories for CVE-2026-8496(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Patch Availability(1)

Vendor / EcosystemFixed in / PatchReleasedSource
ubuntusogo-common (2.2.17a-1.1ubuntu0.1~esm1) @ xenial2026-08-23ubuntu

Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.

Affected Packages

(4 across 4 ecosystems)
Debian:11(1)
PackageVulnerable rangeFixed inDependents
sogo5.0.1-4 ... 5.9.1-1 (48 versions)——
Debian:12(1)
PackageVulnerable rangeFixed inDependents
sogo5.8.0-1, 5.8.0-2+deb12u1, 5.8.0-2+deb12u25.8.0-2+deb12u3—
Debian:13(1)
PackageVulnerable rangeFixed inDependents
sogo5.12.1-3, 5.12.1-3+deb13u15.12.1-3+deb13u2—
Debian:14(1)
PackageVulnerable rangeFixed inDependents
sogo5.12.1-3 ... 5.12.7-1 (8 versions)5.12.8-1—

All Vendor Advisories

(1)

Every vendor that published an advisory referencing this CVE — pulled from our cve_vendor_advisories aggregation. Click any row for the vendor's original advisory page.

Data Freshness Timeline

(refreshed 6× in last 7d / 40× 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 203 total refreshes for this CVE.

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

Frequently asked(5)

What is CVE-2026-8496?
CVE-2026-8496 is a medium vulnerability published on May 13, 2026. A cross-site scripting (XSS) vulnerability exists in Alinto SOGo, version 5.12.7. A maliciously crafted ICS calendar invitation files allows arbitrary JavaScript execution within the authenticated SOGo webmail session. The issue occurs because SVG content embedded in the description field of an ICS…
When was CVE-2026-8496 disclosed?
CVE-2026-8496 was first published in the National Vulnerability Database on May 13, 2026, with the most recent update on August 6, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-8496 actively exploited?
CVE-2026-8496 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 63.6% of all scored CVEs.
What is the CVSS score of CVE-2026-8496?
CVE-2026-8496 has a CVSS v3 base score of 6.1 (NVD).
How do I remediate CVE-2026-8496?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-8496, 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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