CVE-2026-39820

HIGHNVD 7.57.5—
EchelonGraph scoreMEDIUM confidence

Score 7.5 from GitHub Security Advisory (severity: HIGH) published 2026-05-07. NVD baseline CVSS 7.5; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
Trending — 4 sources updated 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.

Well-crafted inputs reaching ParseAddress, ParseAddressList, and ParseDate were able to trigger excessive CPU exhaustion and memory allocations.

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
53%
KEV
Not listed

Published

May 7, 2026

Last Modified

August 25, 2026

Advisory Details (4)

Auto-updated Jun 5, 2026
No patch confirmed yet.
generic

GO-2026-4986 - Go Packages

https://pkg.go.dev/vuln/GO-2026-4986
generic
https://groups.google.com/g/golang-announce/c/qcCIEXso47M
generic

net/mail: ParseAddress: quadratic complexity in consumeComment · Issue #78566 · golang/go · GitHub

https://go.dev/issue/78566
generic
https://go.dev/cl/759940

Vendor Advisories for CVE-2026-39820(20)

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

Patch Availability(28)

Vendor / EcosystemFixed in / PatchReleasedSource
redhatopenshift4/ose-cli-rhel9:17864899102026-08-19redhat
redhatmicroshift-0:4.19.43-202608141837.p0.gcd3decf.assembly.4.19.43.el92026-08-19redhat
redhatose-aws-ecr-image-credential-provider-0:4.19.0-202608111604.p2.g425c1c5.assembly.stream.el92026-08-19redhat
redhatmulticluster-engine/hypershift-addon-rhel9-operator:17869120062026-08-19redhat
redhatopenshift4/ose-cli-rhel9:17864949002026-08-18redhat
redhatopenshift4/ose-hypershift-rhel9:17865730752026-08-18redhat
redhatopenshift-logging/logging-loki-rhel9:17866452482026-08-18redhat
redhatcert-manager/jetstack-cert-manager-rhel9:17866138052026-08-13redhat
redhatworkload-availability/node-maintenance-rhel9-operator:17852028472026-08-12redhat
redhatworkload-availability/machine-deletion-remediation-rhel9-operator:17852035082026-08-12redhat
redhatworkload-availability/fence-agents-remediation-rhel9-operator:17852030792026-08-12redhat
redhatworkload-availability/storage-based-remediation-rhel9-operator:17852034742026-08-12redhat
redhatworkload-availability/self-node-remediation-rhel9-operator:17852030362026-08-12redhat
redhatworkload-availability/node-healthcheck-rhel9-operator:17852027232026-08-12redhat
redhatoadp/oadp-velero-plugin-rhel9:17851773572026-08-06redhat
redhatopenshift-logging/logging-loki-rhel9:17854190672026-08-05redhat
redhatconforma-cli-stack-v1-4-1.4.32026-08-05redhat
redhatrhosdt/opentelemetry-rhel9-operator:17857045472026-08-04redhat
redhatmta/mta-cli-rhel9:17851716392026-08-04redhat
redhatopenshift-logging/logging-loki-rhel9:17847480102026-07-29redhat
redhatoadp/oadp-velero-rhel9:17840588222026-07-22redhat
redhatmta/mta-cli-rhel9:17842113782026-07-21redhat
redhatrhoai/odh-kueue-controller-rhel9:17835444612026-07-21redhat
redhatquay/quay-rhel8:17843539042026-07-21redhat
redhatquay/quay-rhel8:17843519662026-07-21redhat
redhatrhmtc/openshift-migration-controller-rhel8:17839533722026-07-20redhat
redhatquay/quay-rhel8:17837518652026-07-20redhat
redhatquay/quay-rhel9:17839558462026-07-16redhat

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 5 ecosystems)
Debian:14(2)
PackageVulnerable rangeFixed inDependents
golang-1.251.25.0-1 ... 1.25.9-1 (11 versions)1.25.10-1—
golang-1.261.26.0-1 ... 1.26~rc3-2 (9 versions)1.26.3-1—
Debian:11(1)
PackageVulnerable rangeFixed inDependents
golang-1.151.15.15-1 ... 1.15.9-6 (10 versions)——
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—1.26.3—

Weakness Classification(2)

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 28× in last 7d / 169× 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 305 total refreshes for this CVE.

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

Frequently asked(5)

What is CVE-2026-39820?
CVE-2026-39820 is a high vulnerability published on May 7, 2026. Well-crafted inputs reaching ParseAddress, ParseAddressList, and ParseDate were able to trigger excessive CPU exhaustion and memory allocations.
When was CVE-2026-39820 disclosed?
CVE-2026-39820 was first published in the National Vulnerability Database on May 7, 2026, with the most recent update on August 25, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-39820 actively exploited?
CVE-2026-39820 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 46.7% of all scored CVEs.
What is the CVSS score of CVE-2026-39820?
CVE-2026-39820 has a CVSS v3 base score of 7.5 (NVD).
How do I remediate CVE-2026-39820?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-39820, 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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