CVE-2026-5816

HIGHNVD 8.08.0—
EchelonGraph scoreMEDIUM confidence

Score 8.0 from GitHub Security Advisory (severity: HIGH) published 2026-04-22. NVD baseline CVSS 8.0; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
8.0
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 0%CVSS: 8.0Exploit: NoneExposed: 0

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

GitLab has remediated an issue in GitLab CE/EE affecting all versions from 18.10 before 18.10.4 and 18.11 before 18.11.1 that could have allowed an unauthenticated user to execute arbitrary JavaScript in a user's browser session due to improper path validation under certain conditions.

CVSS v3
8.0
EG Score
8.0(medium)
EPSS
32.7%
KEV
Not listed

Published

April 22, 2026

Last Modified

April 23, 2026

Advisory Details (2)

Auto-updated Jun 4, 2026
No patch confirmed yet.
generic

GitLab.org / GitLab · GitLab

https://gitlab.com/gitlab-org/gitlab/-/work_items/592816
generic

GitLab Patch Release: 18.11.1, 18.10.4, 18.9.6 | GitLab Docs

https://about.gitlab.com/releases/2026/04/22/patch-release-gitlab-18-11-1-released/

Vendor Advisories for CVE-2026-5816(1)

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

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 10× in last 7d / 61× 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 111 total refreshes for this CVE.

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

Frequently asked(5)

What is CVE-2026-5816?
CVE-2026-5816 is a high vulnerability published on April 22, 2026. GitLab has remediated an issue in GitLab CE/EE affecting all versions from 18.10 before 18.10.4 and 18.11 before 18.11.1 that could have allowed an unauthenticated user to execute arbitrary JavaScript in a user's browser session due to improper path validation under certain conditions.
When was CVE-2026-5816 disclosed?
CVE-2026-5816 was first published in the National Vulnerability Database on April 22, 2026, with the most recent update on April 23, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-5816 actively exploited?
CVE-2026-5816 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 32.7% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-5816?
CVE-2026-5816 has a CVSS v3 base score of 8.0 (NVD).
How do I remediate CVE-2026-5816?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-5816, 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.

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