CVE-2026-27136

MEDIUMNVD 6.16.1—
EchelonGraph scoreMEDIUM confidence

Score 6.1 from GitHub Security Advisory published 2026-05-26. NVD baseline CVSS 6.1; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
6.1
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS: 0%CVSS: 6.1Exploit: NoneExposed: 0

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

Parsing arbitrary HTML which is then rendered using Render can result in an unexpected HTML tree. This can be leveraged to execute XSS attacks in applications that attempt to sanitize input HTML before rendering.

CVSS v3
6.1
EG Score
6.1(medium)
EPSS
7.5%
KEV
Not listed

Published

May 26, 2026

Last Modified

May 29, 2026

Advisory Details (4)

Auto-updated Jun 15, 2026
No patch confirmed yet.
generic

GO-2026-5030 - Go Packages

https://pkg.go.dev/vuln/GO-2026-5030
generic
https://groups.google.com/g/golang-announce/c/iI-mYSI0lu8
generic

x/net/html: duplicate attributes can cause XSS · Issue #79575 · golang/go · GitHub

https://go.dev/issue/79575
generic
https://go.dev/cl/781685

Vendor Advisories for CVE-2026-27136(7)

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

Affected Packages

(1 across 1 ecosystem)
Go(1)
PackageVulnerable rangeFixed inDependents
golang.org/x/net—0.55.0—

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 11× in last 7d / 69× 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 153 total refreshes for this CVE.

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

Frequently asked(5)

What is CVE-2026-27136?
CVE-2026-27136 is a medium vulnerability published on May 26, 2026. Parsing arbitrary HTML which is then rendered using Render can result in an unexpected HTML tree. This can be leveraged to execute XSS attacks in applications that attempt to sanitize input HTML before rendering.
When was CVE-2026-27136 disclosed?
CVE-2026-27136 was first published in the National Vulnerability Database on May 26, 2026, with the most recent update on May 29, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-27136 actively exploited?
CVE-2026-27136 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 7.5% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-27136?
CVE-2026-27136 has a CVSS v3 base score of 6.1 (NVD).
How do I remediate CVE-2026-27136?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-27136, 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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