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
7.5EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0.8%CVSS: 7.5Exploit: None knownExposed services: Not assessed

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
7.5HIGHmedium confidence
EG Risk
49
EG Risk 49/100

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
Severity75% × 45%
Exploitation1% × 40%
Automatability100% × 15%
EPSS PROB
0.8%
EPSS %ILE
54th
KEV
Not listed

Published

May 7, 2026

Last Modified

September 18, 2026

Advisory Details (4)

Auto-updated Jun 5, 2026
Patch available.
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 / EcosystemFix (by version range) / 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 rangeFix by version rangeDependents
golang-1.251.25.0-1 ... 1.25.9-1 (11 versions)
  • every version up to 1.25.10-1: fixed in 1.25.10-1
—
golang-1.261.26.0-1 ... 1.26~rc3-2 (9 versions)
  • every version up to 1.26.3-1: fixed in 1.26.3-1
—
Debian:11(1)
PackageVulnerable rangeFix by version rangeDependents
golang-1.151.15.15-1 ... 1.15.9-6 (10 versions)
  • every version on: no fix on record
—
Debian:12(1)
PackageVulnerable rangeFix by version rangeDependents
golang-1.191.19.10-1 ... 1.19.9-1 (12 versions)
  • every version on: no fix on record
—
Debian:13(1)
PackageVulnerable rangeFix by version rangeDependents
golang-1.241.24.12-1 ... 1.24.9-1 (10 versions)
  • every version on: no fix on record
—
Go(1)
PackageVulnerable rangeFix by version rangeDependents
stdlib—
  • every version up to 1.25.10: fixed in 1.25.10
  • 1.26.0-0 up to 1.26.3: fixed in 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 8× in last 7d / 56× 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 423 total refreshes for this CVE.

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

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

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 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 0.8% probability of exploitation in the next 30 days (54th percentile of EPSS-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?
A fix for CVE-2026-39820 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-39820 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

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