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
7.6%
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(18)

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 14× 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 146 total refreshes for this CVE.

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

Related CVEs(same vendor + same CWE)

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 7.6% 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.

Dependency Blast Radius

See which npm, PyPI, Go, and Maven packages are affected by CVE-2026-27136

Explore →

Is Your Infrastructure Affected by CVE-2026-27136?

EchelonGraph automatically scans your cloud infrastructure and maps CVE exposure using blast radius analysis.

Start Free Scan →Browse All CVEs