CVE-2026-42502

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
6.1EG
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.

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)
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
13%
KEV
Not listed

Published

May 26, 2026

Last Modified

July 23, 2026

Advisory Details (4)

Auto-updated Jun 16, 2026
No patch confirmed yet.
generic

GO-2026-5027 - Go Packages

https://pkg.go.dev/vuln/GO-2026-5027
generic
https://groups.google.com/g/golang-announce/c/iI-mYSI0lu8
generic

x/net/html: incorrect handling of HTML elements in foreign content · Issue #79572 · golang/go · GitHub

https://go.dev/issue/79572
generic
https://go.dev/cl/781701

Vendor Advisories for CVE-2026-42502(20)

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

Patch Availability(16)

Vendor / EcosystemFixed in / PatchReleasedSource
redhatmulticluster-engine/hypershift-addon-rhel9-operator:17869120062026-08-19redhat
redhatrhacm2/multicluster-observability-rhel9-operator:17869084272026-08-19redhat
redhatopenshift-logging/cluster-logging-rhel9-operator:17866583782026-08-18redhat
redhatcert-manager/jetstack-cert-manager-rhel9:17866138052026-08-13redhat
redhatcert-manager/cert-manager-istio-csr-rhel9:17866153352026-08-13redhat
redhatrh-lightspeed-runtimes/runtimes-inventory-rhel9-operator:17864837822026-08-12redhat
redhatcompliance/openshift-file-integrity-rhel8-operator:17864394492026-08-12redhat
redhatrhacm2/multicluster-observability-rhel9-operator:17865478352026-08-12redhat
redhatsatellite/iop-vmaas-rhel9:17859233082026-08-06redhat
redhatoadp/oadp-velero-rhel9:17840588222026-07-22redhat
redhatodf4/rook-ceph-rhel9-operator:17829342842026-07-09redhat
redhatadvanced-cluster-security/rhacs-scanner-slim-rhel8:17828917892026-07-08redhat
redhatadvanced-cluster-security/rhacs-scanner-v4-rhel9:17833525892026-07-07redhat
redhatadvanced-cluster-security/rhacs-scanner-slim-rhel8:17828918122026-07-07redhat
redhatadvanced-cluster-security/rhacs-scanner-v4-rhel8:17816864462026-06-17redhat
redhatadvanced-cluster-security/rhacs-scanner-v4-rhel8:17816864582026-06-17redhat

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

(5 across 5 ecosystems)
Debian:11(1)
PackageVulnerable rangeFixed inDependents
golang-golang-x-net1:0.0+git20210119.5f4716e+dfsg-4 ... 1:0.7.0+dfsg-1 (40 versions)——
Debian:12(1)
PackageVulnerable rangeFixed inDependents
golang-golang-x-net1:0.10.0-1 ... 1:0.7.0+dfsg-1 (27 versions)——
Debian:13(1)
PackageVulnerable rangeFixed inDependents
golang-golang-x-net1:0.27.0-2 ... 1:0.58.0-1 (10 versions)——
Debian:14(1)
PackageVulnerable rangeFixed inDependents
golang-golang-x-net1:0.27.0-2 ... 1:0.53.0-2~bpo13+1 (6 versions)1:0.55.0-1—
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.

All Vendor Advisories

(17)

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 / 34× 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 234 total refreshes for this CVE.

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

Frequently asked(5)

What is CVE-2026-42502?
CVE-2026-42502 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-2026-42502 disclosed?
CVE-2026-42502 was first published in the National Vulnerability Database on May 26, 2026, with the most recent update on July 23, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-42502 actively exploited?
CVE-2026-42502 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 86.8% of all scored CVEs.
What is the CVSS score of CVE-2026-42502?
CVE-2026-42502 has a CVSS v3 base score of 6.1 (NVD).
How do I remediate CVE-2026-42502?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-42502, 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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