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 — 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.

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
54%
KEV
Not listed

Published

May 7, 2026

Last Modified

September 18, 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(30)

Vendor / EcosystemFixed in / PatchReleasedSource
redhatosbuild-composer-0:75-10.el8_82026-09-17redhat
redhatopenshift-0:4.13.0-202608122150.p2.gbbc7c0c.assembly.stream.el82026-09-17redhat
redhatopentelemetry-collector-0:0.152.1-2.el9_42026-09-17redhat
redhatflightctl-0:1.1.4-1.el9em2026-09-16redhat
redhatopentelemetry-collector-0:0.152.1-2.el10_02026-09-16redhat
redhatopentelemetry-collector-0:0.152.1-2.el9_62026-09-16redhat
redhatgrafana-0:10.2.6-26.el10_02026-09-15redhat
redhatosbuild-composer-0:134.1-12.el10_02026-09-10redhat
redhatoadp/oadp-velero-rhel9:17888604612026-09-09redhat
redhatosbuild-composer-0:165.1-3.el10_2.22026-09-09redhat
redhatosbuild-composer-0:101.5-2.el8_102026-09-09redhat
redhatimage-builder-0:52.1-1.el9_8.22026-09-09redhat
redhatignition-0:2.21.0-7.el9_6.12026-09-08redhat
redhatopentelemetry-collector-0:0.152.1-2.el10_22026-09-08redhat
redhatimage-builder-0:52.1-1.el10_2.22026-09-08redhat
redhatopentelemetry-collector-0:0.152.1-2.el9_82026-09-08redhat
redhatignition-0:2.21.0-3.el10_0.42026-09-08redhat
redhatosbuild-composer-0:165.1-4.el9_8.12026-09-08redhat
redhatopenshift4/ose-installer:17867528862026-09-03redhat
redhatose-gcp-gcr-image-credential-provider-0:4.17.0-202608122146.p2.g8ce997d.assembly.stream.el82026-09-03redhat
redhatopenshift4/ose-cli-rhel9:17875494452026-09-03redhat
redhatgrafana-0:10.2.6-28.el10_2.52026-09-03redhat
redhatopenshift-0:4.12.0-202608131627.p2.g0e18cfc.assembly.stream.el82026-09-03redhat
redhatgrafana-0:10.2.6-23.el9_8.32026-09-02redhat
redhatosbuild-composer-0:76.1-9.el9_22026-09-02redhat
redhatgrafana-0:9.2.10-33.el8_102026-09-02redhat
redhatosbuild-composer-0:132.2-12.el9_62026-09-02redhat
redhatosbuild-composer-0:101.3-4.el9_4.62026-09-02redhat
redhatdevspaces/traefik-rhel9:17877567992026-09-01redhat
redhatgolang-0:1.26.5-1.el9_22026-08-31redhat

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 / 125× 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 408 total refreshes for this CVE.

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

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 September 18, 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 45.5% 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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