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
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.

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

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
55th
KEV
Not listed

Published

May 7, 2026

Last Modified

September 18, 2026

Advisory Details (4)

Auto-updated Jun 6, 2026
Patch available.
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(30)

Vendor / EcosystemFix (by version range) / PatchReleasedSource
redhatosbuild-composer-0:75-10.el8_82026-09-17redhat
redhatopentelemetry-collector-0:0.152.1-2.el9_42026-09-17redhat
redhatopenshift-0:4.13.0-202608122150.p2.gbbc7c0c.assembly.stream.el82026-09-17redhat
redhatopentelemetry-collector-0:0.152.1-2.el10_02026-09-16redhat
redhatflightctl-0:1.1.4-1.el9em2026-09-16redhat
redhatopentelemetry-collector-0:0.152.1-2.el9_62026-09-16redhat
redhatgrafana-0:10.2.6-26.el10_02026-09-15redhat
redhatosbuild-composer-0:101.5-3.el8_102026-09-14redhat
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
redhatmicroshift-0:4.19.46-202609041024.p0.g59e34c7.assembly.4.19.46.el92026-09-09redhat
redhatimage-builder-0:52.1-1.el9_8.22026-09-09redhat
redhatignition-0:2.21.0-3.el10_0.42026-09-08redhat
redhatopentelemetry-collector-0:0.152.1-2.el10_22026-09-08redhat
redhatimage-builder-0:52.1-1.el10_2.22026-09-08redhat
redhatskopeo-2:1.22.2-5.el10_22026-09-08redhat
redhatopentelemetry-collector-0:0.152.1-2.el9_82026-09-08redhat
redhatosbuild-composer-0:165.1-4.el9_8.12026-09-08redhat
redhatignition-0:2.21.0-7.el9_6.12026-09-08redhat
redhatbuildah-2:1.43.1-5.el10_22026-09-04redhat
redhatcontainer-tools:rhel8-8100020260901110702.afee755d2026-09-04redhat
redhatopenshift-0:4.12.0-202608131627.p2.g0e18cfc.assembly.stream.el82026-09-03redhat
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
redhatopenshift4/ose-installer:17867528862026-09-03redhat
redhatgrafana-0:10.2.6-28.el10_2.52026-09-03redhat
redhatosbuild-composer-0:101.3-4.el9_4.62026-09-02redhat
redhatosbuild-composer-0:76.1-9.el9_22026-09-02redhat
redhatosbuild-composer-0:132.2-12.el9_62026-09-02redhat

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(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 8× in last 7d / 53× 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 411 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 19:50 UTCEPSS rescore
  10. 2026-09-30 15:03 UTCEPSS rescore
  11. 2026-09-27 13:48 UTCEPSS rescore
  12. 2026-09-26 15:58 UTCEPSS rescore
  13. 2026-09-23 17:53 UTCEPSS rescore
  14. 2026-09-20 20:15 UTCEPSS rescore
  15. 2026-09-18 19:28 UTCEPSS rescore
  16. 2026-09-18 13:23 UTCVendor advisory
  17. 2026-09-18 13:23 UTCGHSA enrichment
  18. 2026-09-18 12:20 UTCEG score recompute
  19. 2026-09-18 12:20 UTCVendor advisory
  20. 2026-09-18 12:20 UTCGHSA enrichment
  21. 2026-09-17 19:31 UTCEPSS rescore
  22. 2026-09-17 12:20 UTCVendor advisory
  23. 2026-09-17 12:20 UTCGHSA enrichment
  24. 2026-09-17 12:11 UTCEG score recompute
  25. 2026-09-17 12:11 UTCVendor advisory
Show 75 more
  1. 2026-09-17 12:11 UTCGHSA enrichment
  2. 2026-09-16 14:08 UTCEPSS rescore
  3. 2026-09-16 05:15 UTCEPSS rescore
  4. 2026-09-15 12:30 UTCVendor advisory
  5. 2026-09-15 12:30 UTCGHSA enrichment
  6. 2026-09-15 12:13 UTCEG score recompute
  7. 2026-09-15 12:13 UTCVendor advisory
  8. 2026-09-15 12:13 UTCGHSA enrichment
  9. 2026-09-14 13:39 UTCVendor advisory
  10. 2026-09-14 13:39 UTCGHSA enrichment
  11. 2026-09-14 12:35 UTCEG score recompute
  12. 2026-09-14 12:35 UTCVendor advisory
  13. 2026-09-14 12:35 UTCGHSA enrichment
  14. 2026-09-13 16:47 UTCEPSS rescore
  15. 2026-09-12 15:01 UTCEPSS rescore
  16. 2026-09-11 14:53 UTCEPSS rescore
  17. 2026-09-11 13:25 UTCVendor advisory
  18. 2026-09-11 13:25 UTCGHSA enrichment
  19. 2026-09-11 12:21 UTCEG score recompute
  20. 2026-09-11 12:21 UTCVendor advisory
  21. 2026-09-11 12:21 UTCGHSA enrichment
  22. 2026-09-11 09:37 UTCEPSS rescore
  23. 2026-09-10 13:39 UTCVendor advisory
  24. 2026-09-10 13:39 UTCGHSA enrichment
  25. 2026-09-10 12:27 UTCEG score recompute
  26. 2026-09-10 12:27 UTCVendor advisory
  27. 2026-09-10 12:27 UTCGHSA enrichment
  28. 2026-09-10 09:34 UTCEPSS rescore
  29. 2026-09-09 13:41 UTCVendor advisory
  30. 2026-09-09 13:41 UTCGHSA enrichment
  31. 2026-09-09 12:39 UTCEG score recompute
  32. 2026-09-09 12:39 UTCVendor advisory
  33. 2026-09-09 12:39 UTCGHSA enrichment
  34. 2026-09-08 22:00 UTCEPSS rescore
  35. 2026-09-07 16:01 UTCEPSS rescore
  36. 2026-09-07 13:57 UTCVendor advisory
  37. 2026-09-07 13:57 UTCGHSA enrichment
  38. 2026-09-07 12:45 UTCEG score recompute
  39. 2026-09-07 12:45 UTCVendor advisory
  40. 2026-09-07 12:45 UTCGHSA enrichment
  41. 2026-09-06 13:47 UTCEPSS rescore
  42. 2026-09-04 13:29 UTCVendor advisory
  43. 2026-09-04 13:29 UTCGHSA enrichment
  44. 2026-09-04 12:22 UTCEG score recompute
  45. 2026-09-04 12:22 UTCVendor advisory
  46. 2026-09-04 12:22 UTCGHSA enrichment
  47. 2026-09-04 05:06 UTCEPSS rescore
  48. 2026-09-03 13:20 UTCVendor advisory
  49. 2026-09-03 13:20 UTCGHSA enrichment
  50. 2026-09-03 12:29 UTCEG score recompute
  51. 2026-09-03 12:29 UTCVendor advisory
  52. 2026-09-03 12:29 UTCGHSA enrichment
  53. 2026-09-02 14:12 UTCEPSS rescore
  54. 2026-09-02 13:42 UTCVendor advisory
  55. 2026-09-02 13:41 UTCGHSA enrichment
  56. 2026-09-02 12:39 UTCEG score recompute
  57. 2026-09-02 12:39 UTCVendor advisory
  58. 2026-09-02 12:39 UTCGHSA enrichment
  59. 2026-09-01 13:54 UTCEPSS rescore
  60. 2026-09-01 13:48 UTCVendor advisory
  61. 2026-09-01 13:47 UTCGHSA enrichment
  62. 2026-09-01 12:22 UTCEG score recompute
  63. 2026-09-01 12:22 UTCVendor advisory
  64. 2026-09-01 12:21 UTCGHSA enrichment
  65. 2026-08-31 13:34 UTCVendor advisory
  66. 2026-08-31 13:33 UTCGHSA enrichment
  67. 2026-08-31 12:30 UTCEG score recompute
  68. 2026-08-31 12:30 UTCVendor advisory
  69. 2026-08-31 12:30 UTCGHSA enrichment
  70. 2026-08-30 19:17 UTCEPSS rescore
  71. 2026-08-30 01:22 UTCEPSS rescore
  72. 2026-08-28 21:41 UTCEPSS rescore
  73. 2026-08-28 16:48 UTCVendor advisory
  74. 2026-08-28 16:48 UTCGHSA enrichment
  75. 2026-08-28 16:00 UTCEG score recompute

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

Same CWE

1 shown

CWE-1046

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 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-2026-42499 actively exploited?
CVE-2026-42499 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.8% probability of exploitation in the next 30 days (55th percentile of EPSS-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?
A fix for CVE-2026-42499 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-42499 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

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