CVE-2026-56859

HIGHPre-NVD 7.57.5—
EchelonGraph scoreMEDIUM confidence

Score 7.5 from GitHub Security Advisory (severity: HIGH) published 2026-08-14. CISA-ADP (Vulnrichment) CVSS v3.1 baseline 7.5; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: cisa-adp, epss, ghsa
Trending — Patch released this week
7.5EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 1%CVSS: 7.5Exploit: None knownExposed: 0

A fix is available — apply it.

Previously, DecodeElement would reset the depth counter causing it to never fire; this could lead to stack exhaustion.

CVSS v3
7.5
EG Score
7.5(medium)
EG Risk
49(Track)
EG Risk 49/100SSVC: 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
Severity75% × 45%
Exploitation1% × 40%
Automatability100% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
1%
EPSS %ILE
46%
KEV
Not listed

Published

August 13, 2026

Last Modified

September 3, 2026

Advisory Details (4)

Auto-updated Aug 14, 2026
No patch confirmed yet.
generic

GO-2026-6088 - Go Packages

https://pkg.go.dev/vuln/GO-2026-6088
generic
https://groups.google.com/g/golang-announce/c/94pEornpRlI
generic
https://go.dev/cl/803320
generic

encoding/xml: (*Decoder).DecodeElement bypasses recursion-depth guard · Issue #80481 · golang/go · GitHub

https://go.dev/issue/80481

Vendor Advisories for CVE-2026-56859(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 / EcosystemFixed in / PatchReleasedSource
redhatosbuild-composer-0:75-10.el8_82026-09-17redhat
redhatopentelemetry-collector-0:0.152.1-2.el9_42026-09-17redhat
redhatcryostat/cryostat-storage-rhel9:4.2.0-222026-09-16redhat
redhatflightctl-0:1.1.4-1.el9em2026-09-16redhat
redhatflightctl-0:1.2.1-1.el92026-09-16redhat
redhatopentelemetry-collector-0:0.152.1-2.el9_62026-09-16redhat
redhatopentelemetry-collector-0:0.152.1-2.el10_02026-09-16redhat
redhatose-crio-credential-provider-0:4.21.0-202609021357.p2.g83d4961.assembly.stream.el102026-09-15redhat
redhatopenshift-0:4.22.0-202609021800.p2.g19365a0.assembly.stream.el82026-09-15redhat
redhatgrafana-0:10.2.6-26.el10_02026-09-15redhat
redhatopenshift-0:4.20.0-202609041738.p2.g4012064.assembly.stream.el82026-09-15redhat
redhatgrafana-0:10.2.6-23.el9_62026-09-15redhat
redhatdelve-0:1.26.1-1.el9_2.12026-09-14redhat
redhatgit-lfs-0:3.2.0-2.el9_2.102026-09-14redhat
redhatrhc-worker-playbook-0:0.2.10-2.el10_22026-09-14redhat
redhatdelve-0:1.26.1-1.el9_6.12026-09-14redhat
redhatdelve-0:1.26.1-1.el9_4.12026-09-14redhat
redhatopenshift-logging/eventrouter-rhel9:17883757962026-09-10redhat
redhatosbuild-composer-0:134.1-12.el10_02026-09-10redhat
redhatquay/quay-rhel8:17885943762026-09-10redhat
redhatosbuild-composer-0:101.5-2.el8_102026-09-09redhat
redhatosbuild-composer-0:165.1-3.el10_2.22026-09-09redhat
redhatignition-0:2.17.0-2.el9_4.22026-09-09redhat
redhatimage-builder-0:52.1-1.el9_8.22026-09-09redhat
redhatquay/quay-rhel8:17885618412026-09-09redhat
redhatoadp/oadp-velero-rhel9:17888604612026-09-09redhat
redhatdelve-0:1.26.1-2.el10_02026-09-09redhat
redhatopentelemetry-collector-0:0.152.1-2.el9_82026-09-08redhat
redhatopentelemetry-collector-0:0.152.1-2.el10_22026-09-08redhat
redhatimage-builder-0:52.1-1.el10_2.22026-09-08redhat

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

(6 across 4 ecosystems)
Debian:14(3)
PackageVulnerable rangeFixed inDependents
golang-1.251.25.0-1 ... 1.25.9-1 (20 versions)——
golang-1.261.26.0-1 ... 1.26~rc3-2 (16 versions)1.26.6-1—
golang-1.271.27~rc1-1, 1.27~rc2-11.27~rc3-1—
Debian:12(1)
PackageVulnerable rangeFixed inDependents
golang-1.191.19.10-1 ... 1.19.9-1 (12 versions)——
Debian:13(1)
PackageVulnerable rangeFixed inDependents
golang-1.241.24.12-1 ... 1.24.9-1 (10 versions)——
Go(1)
PackageVulnerable rangeFixed inDependents
stdlib—1.27.0-rc.3—

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 41× in last 7d / 172× 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 209 total refreshes for this CVE.

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

Related CVEs(same vendor + same CWE)

Frequently asked(5)

What is CVE-2026-56859?
CVE-2026-56859 is a high vulnerability published on August 13, 2026. Previously, DecodeElement would reset the depth counter causing it to never fire; this could lead to stack exhaustion.
When was CVE-2026-56859 disclosed?
CVE-2026-56859 was first published in the National Vulnerability Database on August 13, 2026, with the most recent update on September 3, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-56859 actively exploited?
CVE-2026-56859 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 1% probability of exploitation in the next 30 days, which ranks it in the top 54.2% of all scored CVEs.
What is the CVSS score of CVE-2026-56859?
CVE-2026-56859 has a CVSS v3.1 base score of 7.5 (CISA-ADP / Vulnrichment enrichment; NVD's own analysis pending).
How do I remediate CVE-2026-56859?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-56859, 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-2026-56859

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