CVE-2026-27136

MEDIUMNVD 6.16.1
EchelonGraph scoreMEDIUM confidence

“—” beside the score: it is equal to NVD's CVSS score.

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, GitHub Security Advisory, NVD CVSS v3
6.1EG
EchelonGraph verdictMonitorRemediate within your standard update timelines (the SSVC decision on this page).
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0.2%CVSS: 6.1Exploit: None knownExposed services: Not assessed

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
6.1MEDIUMmedium confidence
EG Risk
28
EG Risk 28/100

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 (value × EchelonGraph’s weight)
Severity61% × 45%
The EG Score, 6.1 of 10.
Exploitation0.2% × 40%
FIRST EPSS: the 30-day exploitation probability when EchelonGraph scored this CVE.
Automatability0% × 15%
CISA's SSVC Automatable value: no (Vulnrichment).
SSVC (CISA's decision table, applied by EchelonGraph): Track at every mission impact level.
Exploitation none (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE.
Action: A fix is available. Apply it within your standard update timelines.
EPSS PROB
0.2%
EPSS %ILE
11th
KEV
Not listed

SSVC (CISA's decision table, applied by EchelonGraph)Track at every mission impact level.

A fix is available. Apply it within your standard update timelines.

Exploitation none (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE. Mission impact is CISA's Mission & Well-being decision point, and only you can judge it. CISA's table makes it high when Mission Prevalence is Essential — the vulnerable component "directly provides capabilities that constitute at least one MEF for at least one entity" (MEF: mission essential function) — or when Public Well-Being Impact is Irreversible: "multiple fatalities are likely", the cyber-physical system "is likely lost or destroyed", "extreme or serious externalities" are imposed on other parties, or social systems such as elections or the financial grid "are destabilized and potentially collapse". CISA's decision table

BOD 26-04 (CISA's remediation timeline, Table 1)60 days if the affected system is publicly exposed; Fix on system upgrade if it is not.

In CISA KEV no (CISA's KEV catalog) · Automatable no (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). Whether your system is publicly exposed is yours to answer. BOD 26-04 binds US Federal Civilian Executive Branch agencies; for anyone else it is CISA's published timeline, a reference rather than an obligation. The directive · how EchelonGraph applies it

Published

May 26, 2026

Last Modified

July 23, 2026

Advisory Details (4)

Auto-updated Jun 15, 2026
Patch available.
Web page

GO-2026-5030 - Go Packages

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

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

https://go.dev/issue/79575
Web page
https://go.dev/cl/781685

Vendor Advisories for CVE-2026-27136(20)

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

Patch Availability(30)

Vendor / EcosystemFix (by version range) / PatchReleasedSource
redhatmulticluster-engine/hypershift-addon-rhel9-operator:17869120062026-08-19redhat
redhatodf4/rook-ceph-rhel9-operator:17866295482026-08-19redhat
redhatrhacm2/rbac-query-proxy-rhel9:17869091362026-08-19redhat
redhatopenshift-logging/cluster-logging-rhel9-operator:17866583782026-08-18redhat
redhatodf4/rook-ceph-rhel9-operator:17867031432026-08-18redhat
redhatopenshift4/ose-insights-rhel9-operator:17865866632026-08-18redhat
redhatmta/mta-platform-addon-rhel9:17864814892026-08-18redhat
redhatcert-manager/jetstack-cert-manager-rhel9:17866138052026-08-13redhat
redhatcert-manager/cert-manager-istio-csr-rhel9:17866153352026-08-13redhat
redhatworkload-availability/machine-deletion-remediation-rhel9-operator:17852035082026-08-12redhat
redhatworkload-availability/node-maintenance-rhel9-operator:17852028472026-08-12redhat
redhatworkload-availability/storage-based-remediation-rhel9-operator:17852034742026-08-12redhat
redhatworkload-availability/fence-agents-remediation-rhel9-operator:17852030792026-08-12redhat
redhatworkload-availability/self-node-remediation-rhel9-operator:17852030362026-08-12redhat
redhatworkload-availability/node-healthcheck-rhel9-operator:17852027232026-08-12redhat
redhatcompliance/openshift-file-integrity-rhel8-operator:17864394492026-08-12redhat
redhatrh-lightspeed-runtimes/runtimes-inventory-rhel9-operator:17864837822026-08-12redhat
redhatopentelemetry-collector-0:0.152.1-1.el9_62026-08-11redhat
redhatopentelemetry-collector-0:0.152.1-1.el9_42026-08-11redhat
redhatopenshift4/ose-ibmcloud-machine-controllers-rhel9:17858843252026-08-11redhat
redhatopentelemetry-collector-0:0.152.1-1.el10_02026-08-11redhat
redhatopenshift-gitops-1/dex-rhel9:17852111822026-08-10redhat
redhatopenshift-gitops-1/dex-rhel8:17851485672026-08-10redhat
redhatoadp/oadp-velero-rhel9:17851808782026-08-06redhat
redhatsatellite/iop-vmaas-rhel9:17859233082026-08-06redhat
redhatgrafana-0:10.2.6-22.el9_62026-08-06redhat
redhatrhtas/rhtas-rhel9-operator:17854093082026-08-05redhat
redhatopenshift-logging/cluster-logging-rhel9-operator:17854188712026-08-05redhat
redhatmta/mta-cli-rhel9:17851716392026-08-04redhat
redhatmulticluster-engine/hypershift-addon-rhel9-operator:17847387582026-07-29redhat

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 rangeFix by version rangeDependents
golang-golang-x-net1:0.0+git20210119.5f4716e+dfsg-4 ... 1:0.7.0+dfsg-1 (40 versions)
  • every version on: no fix on record
—
Debian:12(1)
PackageVulnerable rangeFix by version rangeDependents
golang-golang-x-net1:0.10.0-1 ... 1:0.7.0+dfsg-1 (27 versions)
  • every version on: no fix on record
—
Debian:13(1)
PackageVulnerable rangeFix by version rangeDependents
golang-golang-x-net1:0.27.0-2 ... 1:0.58.0-1 (10 versions)
  • every version on: no fix on record
—
Debian:14(1)
PackageVulnerable rangeFix by version rangeDependents
golang-golang-x-net1:0.27.0-2 ... 1:0.53.0-2~bpo13+1 (6 versions)
  • every version up to 1:0.55.0-1: fixed in 1:0.55.0-1
—
Go(1)
PackageVulnerable rangeFix by version rangeDependents
golang.org/x/net—
  • every version up to 0.55.0: fixed in 0.55.0
—

Weakness Classification(1)

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

All Vendor Advisories

(25)

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 12× in last 7d / 27× in last 30d)

Each row is a time one of our pipelines fetched, updated or re-scored this CVE. 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. An arrow marks a change the record states ("CVSS v3 → 9.1"); EPSS and GHSA rows show the values recorded at that time, not what changed (EPSS values are rounded; hover one for the exact figures). Most recent first.

Showing the most recent 97 of 279 refreshes on record for this CVE.

A repeat, a row identical to one the same pipeline wrote less than 10 seconds earlier, is not a separate refresh and is not counted. 3 repeat rows among the latest 100 are merged into the row they repeat. The 182 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

  1. 2026-10-14 16:32 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  2. 2026-10-13 16:33 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  3. 2026-10-12 16:33 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  4. 2026-10-12 16:17 UTCEG score recompute
  5. 2026-10-11 20:00 UTCEG score recompute
  6. 2026-10-11 17:13 UTCEG score recompute
  7. 2026-10-11 14:44 UTCEG score recompute
  8. 2026-10-11 13:48 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  9. 2026-10-10 20:00 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  10. 2026-10-09 20:07 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  11. 2026-10-08 17:11 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  12. 2026-10-07 23:47 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  13. 2026-10-06 15:17 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  14. 2026-10-05 17:42 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  15. 2026-10-04 23:21 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  16. 2026-10-03 14:25 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  17. 2026-10-01 19:49 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  18. 2026-09-30 15:03 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  19. 2026-09-30 02:10 UTCOSV refresh
  20. 2026-09-28 13:51 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  21. 2026-09-26 15:58 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  22. 2026-09-26 00:26 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  23. 2026-09-20 20:15 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  24. 2026-09-18 19:27 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  25. 2026-09-17 19:30 UTCEPSS rescoreEPSS 0.2% · 13th percentile
Show 72 more
  1. 2026-09-16 14:08 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  2. 2026-09-16 05:15 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  3. 2026-09-13 16:47 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  4. 2026-09-12 15:01 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  5. 2026-09-11 03:23 UTCOSV refresh
  6. 2026-09-10 09:34 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  7. 2026-09-08 22:00 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  8. 2026-09-07 16:01 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  9. 2026-09-06 13:47 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  10. 2026-09-04 05:06 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  11. 2026-09-02 14:11 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  12. 2026-09-01 13:53 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  13. 2026-09-01 04:39 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  14. 2026-08-30 19:17 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  15. 2026-08-30 01:22 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  16. 2026-08-28 21:41 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  17. 2026-08-27 14:25 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  18. 2026-08-26 14:46 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  19. 2026-08-25 13:48 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  20. 2026-08-23 16:23 UTCEG score recompute
  21. 2026-08-23 16:23 UTCVendor advisory
  22. 2026-08-23 16:23 UTCGHSA enrichmentGHSA-m9x8-m34x-fj9q · GitHub CVSS 6.1
  23. 2026-08-23 00:19 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  24. 2026-08-21 23:49 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  25. 2026-08-21 21:30 UTCEG score recompute
  26. 2026-08-21 21:30 UTCVendor advisory
  27. 2026-08-21 21:30 UTCGHSA enrichmentGHSA-m9x8-m34x-fj9q · GitHub CVSS 6.1
  28. 2026-08-20 22:55 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  29. 2026-08-20 18:16 UTCEG score recompute
  30. 2026-08-20 18:16 UTCVendor advisory
  31. 2026-08-20 18:16 UTCGHSA enrichmentGHSA-m9x8-m34x-fj9q · GitHub CVSS 6.1
  32. 2026-08-19 17:03 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  33. 2026-08-18 13:48 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  34. 2026-08-17 13:47 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  35. 2026-08-17 09:35 UTCEG score recompute
  36. 2026-08-17 09:35 UTCVendor advisory
  37. 2026-08-17 09:35 UTCGHSA enrichmentGHSA-m9x8-m34x-fj9q · GitHub CVSS 6.1
  38. 2026-08-16 14:56 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  39. 2026-08-16 05:49 UTCEG score recompute
  40. 2026-08-16 05:49 UTCVendor advisory
  41. 2026-08-16 05:49 UTCGHSA enrichmentGHSA-m9x8-m34x-fj9q · GitHub CVSS 6.1
  42. 2026-08-16 02:14 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  43. 2026-08-15 03:48 UTCEG score recompute
  44. 2026-08-15 03:48 UTCVendor advisory
  45. 2026-08-15 03:48 UTCGHSA enrichmentGHSA-m9x8-m34x-fj9q · GitHub CVSS 6.1
  46. 2026-08-15 01:30 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  47. 2026-08-14 01:44 UTCEG score recompute
  48. 2026-08-14 01:44 UTCVendor advisory
  49. 2026-08-14 01:44 UTCGHSA enrichmentGHSA-m9x8-m34x-fj9q · GitHub CVSS 6.1
  50. 2026-08-13 22:00 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  51. 2026-08-12 13:50 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  52. 2026-08-12 11:45 UTCEG score recompute
  53. 2026-08-12 11:45 UTCVendor advisory
  54. 2026-08-12 11:45 UTCGHSA enrichmentGHSA-m9x8-m34x-fj9q · GitHub CVSS 6.1
  55. 2026-08-11 13:42 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  56. 2026-08-11 08:48 UTCEG score recompute
  57. 2026-08-11 08:48 UTCVendor advisory
  58. 2026-08-11 08:48 UTCGHSA enrichmentGHSA-m9x8-m34x-fj9q · GitHub CVSS 6.1
  59. 2026-08-11 00:00 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  60. 2026-08-10 06:46 UTCEG score recompute
  61. 2026-08-10 06:46 UTCVendor advisory
  62. 2026-08-10 06:46 UTCGHSA enrichmentGHSA-m9x8-m34x-fj9q · GitHub CVSS 6.1
  63. 2026-08-09 13:46 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  64. 2026-08-09 04:45 UTCEG score recompute
  65. 2026-08-09 04:45 UTCVendor advisory
  66. 2026-08-09 04:45 UTCGHSA enrichmentGHSA-m9x8-m34x-fj9q · GitHub CVSS 6.1
  67. 2026-08-08 16:37 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  68. 2026-08-08 02:44 UTCEG score recompute
  69. 2026-08-08 02:44 UTCVendor advisory
  70. 2026-08-08 02:44 UTCGHSA enrichmentGHSA-m9x8-m34x-fj9q · GitHub CVSS 6.1
  71. 2026-08-07 00:43 UTCEG score recompute
  72. 2026-08-07 00:43 UTCVendor advisory

Related CVEs(same product + same vendor + same CWE)

Frequently asked(5)

What is CVE-2026-27136?
CVE-2026-27136 is a medium-severity vulnerability; its CVE record was 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 the CVE record for CVE-2026-27136 published?
The CVE record for CVE-2026-27136 was published on May 26, 2026. That is the record's publication date; the vulnerability itself may have been made public earlier. EchelonGraph's copy of the record carries a last-modified date of July 23, 2026; the record at its source may have been updated since.
Is CVE-2026-27136 actively exploited?
CVE-2026-27136 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.2% probability of exploitation in the next 30 days (11th percentile of EPSS-scored CVEs).
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?
A fix for CVE-2026-27136 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-27136 are linked in the Vendor Advisories panel on this page.

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