CVE-2026-42499

HIGHPre-NVD 7.57.5—
EchelonGraph scoreMEDIUM confidence

Score 7.5 from GitHub Security Advisory (severity: HIGH) published 2026-05-07. 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 — 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.

Pathological inputs could cause DoS through consumePhrase when parsing an email address according to RFC 5322.

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

August 25, 2026

Advisory Details (4)

Auto-updated Jun 6, 2026
No patch confirmed yet.
generic

GO-2026-4977 - Go Packages

https://pkg.go.dev/vuln/GO-2026-4977
generic
https://groups.google.com/g/golang-announce/c/qcCIEXso47M
generic

net/mail: quadratic string concatenation in consumePhrase · Issue #78987 · golang/go · GitHub

https://go.dev/issue/78987
generic
https://go.dev/cl/771520

Vendor Advisories for CVE-2026-42499(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
redhatmulticluster-engine/hypershift-addon-rhel9-operator:17869120062026-08-19redhat
redhatose-aws-ecr-image-credential-provider-0:4.19.0-202608111604.p2.g425c1c5.assembly.stream.el92026-08-19redhat
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-healthcheck-rhel9-operator:17852027232026-08-12redhat
redhatworkload-availability/self-node-remediation-rhel9-operator:17852030362026-08-12redhat
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
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
redhatmta/mta-cli-rhel9:17851716392026-08-04redhat
redhatopenshift-logging/logging-loki-rhel9:17847480102026-07-29redhat
redhatoadp/oadp-velero-rhel9:17840588222026-07-22redhat
redhatrhoai/odh-kueue-controller-rhel9:17835444612026-07-21redhat
redhatquay/quay-rhel8:17843539042026-07-21redhat
redhatquay/quay-rhel8:17843519662026-07-21redhat
redhatmta/mta-cli-rhel9:17842113782026-07-21redhat
redhatrhmtc/openshift-migration-controller-rhel8:17839533722026-07-20redhat
redhatquay/quay-rhel8:17837518652026-07-20redhat
redhatquay/quay-rhel8:17837504472026-07-16redhat
redhatquay/quay-rhel9:17839558462026-07-16redhat
redhatquay/quay-rhel8:17841258382026-07-15redhat

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(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 28× 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 297 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 12:40 UTCVendor advisory
  6. 2026-08-18 12:40 UTCGHSA enrichment
  7. 2026-08-18 12:19 UTCEG score recompute
  8. 2026-08-18 12:19 UTCVendor advisory
  9. 2026-08-18 12:18 UTCGHSA enrichment
  10. 2026-08-17 13:47 UTCEPSS rescore
  11. 2026-08-17 12:26 UTCVendor advisory
  12. 2026-08-17 12:26 UTCGHSA enrichment
  13. 2026-08-17 12:12 UTCEG score recompute
  14. 2026-08-17 12:12 UTCVendor advisory
  15. 2026-08-17 12:12 UTCGHSA enrichment
  16. 2026-08-16 14:56 UTCEPSS rescore
  17. 2026-08-16 04:42 UTCEG score recompute
  18. 2026-08-16 04:42 UTCVendor advisory
  19. 2026-08-16 04:42 UTCGHSA enrichment
  20. 2026-08-16 02:14 UTCEPSS rescore
  21. 2026-08-15 01:30 UTCEPSS rescore
  22. 2026-08-15 00:20 UTCVendor advisory
  23. 2026-08-15 00:20 UTCGHSA enrichment
  24. 2026-08-14 13:27 UTCVendor advisory
  25. 2026-08-14 13:27 UTCGHSA enrichment
  26. 2026-08-14 12:29 UTCVendor advisory
  27. 2026-08-14 12:29 UTCGHSA enrichment
  28. 2026-08-14 03:18 UTCEG score recompute
  29. 2026-08-14 03:18 UTCVendor advisory
  30. 2026-08-14 03:17 UTCGHSA enrichment
  31. 2026-08-13 22:00 UTCEPSS rescore
  32. 2026-08-13 13:38 UTCVendor advisory
  33. 2026-08-13 13:38 UTCGHSA enrichment
  34. 2026-08-13 12:28 UTCVendor advisory
  35. 2026-08-13 12:28 UTCGHSA enrichment
  36. 2026-08-13 10:48 UTCVendor advisory
  37. 2026-08-13 10:48 UTCGHSA enrichment
  38. 2026-08-12 23:30 UTCEG score recompute
  39. 2026-08-12 23:30 UTCVendor advisory
  40. 2026-08-12 23:30 UTCGHSA enrichment
  41. 2026-08-12 13:51 UTCEPSS rescore
  42. 2026-08-12 12:38 UTCVendor advisory
  43. 2026-08-12 12:38 UTCGHSA enrichment
  44. 2026-08-12 12:12 UTCVendor advisory
  45. 2026-08-12 12:12 UTCGHSA enrichment
  46. 2026-08-12 00:29 UTCEG score recompute
  47. 2026-08-12 00:29 UTCVendor advisory
  48. 2026-08-12 00:29 UTCGHSA enrichment
  49. 2026-08-11 13:43 UTCEPSS rescore
  50. 2026-08-11 13:23 UTCVendor advisory
  51. 2026-08-11 13:23 UTCGHSA enrichment
  52. 2026-08-11 12:24 UTCVendor advisory
  53. 2026-08-11 12:24 UTCGHSA enrichment
  54. 2026-08-11 01:24 UTCEG score recompute
  55. 2026-08-11 01:24 UTCVendor advisory
  56. 2026-08-11 01:24 UTCGHSA enrichment
  57. 2026-08-11 00:00 UTCEPSS rescore
  58. 2026-08-10 13:21 UTCVendor advisory
  59. 2026-08-10 13:21 UTCGHSA enrichment
  60. 2026-08-10 12:26 UTCVendor advisory
  61. 2026-08-10 12:26 UTCGHSA enrichment
  62. 2026-08-10 11:45 UTCVendor advisory
  63. 2026-08-10 11:45 UTCGHSA enrichment
  64. 2026-08-10 00:13 UTCEG score recompute
  65. 2026-08-10 00:13 UTCVendor advisory
  66. 2026-08-10 00:13 UTCGHSA enrichment
  67. 2026-08-09 13:46 UTCEPSS rescore
  68. 2026-08-09 13:20 UTCVendor advisory
  69. 2026-08-09 13:20 UTCGHSA enrichment
  70. 2026-08-09 02:28 UTCEG score recompute
  71. 2026-08-09 02:28 UTCVendor advisory
  72. 2026-08-09 02:28 UTCGHSA enrichment
  73. 2026-08-08 16:37 UTCEPSS rescore
  74. 2026-08-08 10:25 UTCVendor advisory
  75. 2026-08-08 10:25 UTCGHSA enrichment

Frequently asked(5)

What is CVE-2026-42499?
CVE-2026-42499 is a high vulnerability published on May 7, 2026. Pathological inputs could cause DoS through consumePhrase when parsing an email address according to RFC 5322.
When was CVE-2026-42499 disclosed?
CVE-2026-42499 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-2026-42499 actively exploited?
CVE-2026-42499 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 46.2% of all scored CVEs.
What is the CVSS score of CVE-2026-42499?
CVE-2026-42499 has a CVSS v3.1 base score of 7.5 (CISA-ADP / Vulnrichment enrichment; NVD's own analysis pending).
How do I remediate CVE-2026-42499?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-42499, 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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