CVE-2026-56846

HIGHPre-NVD 7.57.5—
EchelonGraph scoreHIGH confidence

Score 7.5 from GitHub Security Advisory (severity: HIGH) published 2026-08-04. a secondary CVSS source baseline 7.5; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
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.

A flaw in Node.js HTTP/2 handling can cause HTTP/2 retained header blocks evade maxSessionMemory and enable remote memory exhaustion. This vulnerability affects Node.js 24.x and 22.x.

CVSS v3
7.5
EG Score
7.5(high)
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
47%
KEV
Not listed

Published

August 4, 2026

Last Modified

August 4, 2026

Advisory Details (1)

Auto-updated Aug 4, 2026
No patch confirmed yet.
generic

Node.js — Wednesday, July 29, 2026 Security Releases

https://nodejs.org/en/blog/vulnerability/july-2026-security-releases

Vendor Advisories for CVE-2026-56846(3)

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

Patch Availability(2)

Vendor / EcosystemFixed in / PatchReleasedSource
redhatnodejs24-main-24.18.1-0.1.hum12026-07-30redhat
redhatnodejs22-main-22.23.2-2.3.hum12026-07-29redhat

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

(8 across 8 ecosystems)
Alpine:v3.21(1)
PackageVulnerable rangeFixed inDependents
nodejs—22.23.2-r0—
Alpine:v3.22(1)
PackageVulnerable rangeFixed inDependents
nodejs—22.23.2-r0—
Alpine:v3.23(1)
PackageVulnerable rangeFixed inDependents
nodejs—24.18.1-r0—
Alpine:v3.24(1)
PackageVulnerable rangeFixed inDependents
nodejs—24.18.1-r0—
Debian:11(1)
PackageVulnerable rangeFixed inDependents
nodejs12.21.0~dfsg-5 ... 24.18.0+dfsg+~cs24.13.2-1 (174 versions)——
Debian:12(1)
PackageVulnerable rangeFixed inDependents
nodejs18.13.0+dfsg1-1 ... 24.18.0+dfsg+~cs24.13.2-1 (87 versions)——
Debian:13(1)
PackageVulnerable rangeFixed inDependents
nodejs20.19.2+dfsg-1 ... 24.18.0+dfsg+~cs24.13.2-1 (42 versions)——
Debian:14(1)
PackageVulnerable rangeFixed inDependents
nodejs20.19.2+dfsg-1 ... 24.18.0+dfsg+~cs24.13.2-1 (40 versions)——

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 39× in last 7d / 99× 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.

  1. 2026-08-20 22:55 UTCEPSS rescore
  2. 2026-08-20 20:01 UTCVendor advisory
  3. 2026-08-20 20:01 UTCGHSA enrichment
  4. 2026-08-20 07:58 UTCVendor advisory
  5. 2026-08-20 07:58 UTCGHSA enrichment
  6. 2026-08-19 19:55 UTCEG score recompute
  7. 2026-08-19 19:55 UTCVendor advisory
  8. 2026-08-19 19:55 UTCGHSA enrichment
  9. 2026-08-19 17:04 UTCEPSS rescore
  10. 2026-08-19 07:51 UTCVendor advisory
  11. 2026-08-19 07:51 UTCGHSA enrichment
  12. 2026-08-18 19:48 UTCEG score recompute
  13. 2026-08-18 19:48 UTCVendor advisory
  14. 2026-08-18 19:48 UTCGHSA enrichment
  15. 2026-08-18 13:48 UTCEPSS rescore
  16. 2026-08-18 07:45 UTCVendor advisory
  17. 2026-08-18 07:45 UTCGHSA enrichment
  18. 2026-08-17 19:35 UTCEG score recompute
  19. 2026-08-17 19:35 UTCVendor advisory
  20. 2026-08-17 19:35 UTCGHSA enrichment
  21. 2026-08-17 13:47 UTCEPSS rescore
  22. 2026-08-17 06:02 UTCVendor advisory
  23. 2026-08-17 06:02 UTCGHSA enrichment
  24. 2026-08-16 17:58 UTCEG score recompute
  25. 2026-08-16 17:58 UTCVendor advisory
Show 74 more
  1. 2026-08-16 17:58 UTCGHSA enrichment
  2. 2026-08-16 14:56 UTCEPSS rescore
  3. 2026-08-16 05:54 UTCEG score recompute
  4. 2026-08-16 05:54 UTCVendor advisory
  5. 2026-08-16 05:54 UTCGHSA enrichment
  6. 2026-08-16 02:14 UTCEPSS rescore
  7. 2026-08-15 17:52 UTCVendor advisory
  8. 2026-08-15 17:52 UTCGHSA enrichment
  9. 2026-08-15 05:49 UTCEG score recompute
  10. 2026-08-15 05:49 UTCVendor advisory
  11. 2026-08-15 05:49 UTCGHSA enrichment
  12. 2026-08-15 01:30 UTCEPSS rescore
  13. 2026-08-14 17:45 UTCVendor advisory
  14. 2026-08-14 17:45 UTCGHSA enrichment
  15. 2026-08-14 05:42 UTCEG score recompute
  16. 2026-08-14 05:42 UTCVendor advisory
  17. 2026-08-14 05:42 UTCGHSA enrichment
  18. 2026-08-13 22:00 UTCEPSS rescore
  19. 2026-08-13 17:39 UTCVendor advisory
  20. 2026-08-13 17:39 UTCGHSA enrichment
  21. 2026-08-13 05:30 UTCVendor advisory
  22. 2026-08-13 05:30 UTCGHSA enrichment
  23. 2026-08-12 17:28 UTCEG score recompute
  24. 2026-08-12 17:28 UTCVendor advisory
  25. 2026-08-12 17:28 UTCGHSA enrichment
  26. 2026-08-12 13:51 UTCEPSS rescore
  27. 2026-08-12 05:25 UTCVendor advisory
  28. 2026-08-12 05:25 UTCGHSA enrichment
  29. 2026-08-11 17:22 UTCEG score recompute
  30. 2026-08-11 17:22 UTCVendor advisory
  31. 2026-08-11 17:22 UTCGHSA enrichment
  32. 2026-08-11 05:18 UTCEG score recompute
  33. 2026-08-11 05:18 UTCVendor advisory
  34. 2026-08-11 05:18 UTCGHSA enrichment
  35. 2026-08-11 00:00 UTCEPSS rescore
  36. 2026-08-10 17:16 UTCVendor advisory
  37. 2026-08-10 17:16 UTCGHSA enrichment
  38. 2026-08-10 05:14 UTCVendor advisory
  39. 2026-08-10 05:14 UTCGHSA enrichment
  40. 2026-08-09 17:11 UTCEG score recompute
  41. 2026-08-09 17:11 UTCVendor advisory
  42. 2026-08-09 17:11 UTCGHSA enrichment
  43. 2026-08-09 13:46 UTCEPSS rescore
  44. 2026-08-09 05:08 UTCVendor advisory
  45. 2026-08-09 05:08 UTCGHSA enrichment
  46. 2026-08-08 17:06 UTCEG score recompute
  47. 2026-08-08 17:06 UTCVendor advisory
  48. 2026-08-08 17:06 UTCGHSA enrichment
  49. 2026-08-08 16:37 UTCEPSS rescore
  50. 2026-08-08 05:03 UTCVendor advisory
  51. 2026-08-08 05:03 UTCGHSA enrichment
  52. 2026-08-07 17:00 UTCEG score recompute
  53. 2026-08-07 17:00 UTCVendor advisory
  54. 2026-08-07 17:00 UTCGHSA enrichment
  55. 2026-08-07 04:57 UTCVendor advisory
  56. 2026-08-07 04:57 UTCGHSA enrichment
  57. 2026-08-06 16:54 UTCEG score recompute
  58. 2026-08-06 16:54 UTCGHSA enrichment
  59. 2026-08-06 13:47 UTCEPSS rescore
  60. 2026-08-06 04:51 UTCEG score recompute
  61. 2026-08-06 04:51 UTCGHSA enrichment
  62. 2026-08-05 19:17 UTCEPSS rescore
  63. 2026-08-05 16:49 UTCGHSA enrichment
  64. 2026-08-05 04:44 UTCGHSA enrichment
  65. 2026-08-04 16:33 UTCEG score recompute
  66. 2026-08-04 16:33 UTCGHSA enrichment
  67. 2026-08-04 15:38 UTCEG score recompute
  68. 2026-08-04 15:38 UTCGHSA enrichment
  69. 2026-08-04 15:10 UTCEPSS rescore
  70. 2026-08-04 13:27 UTCEG score recompute
  71. 2026-08-04 13:27 UTCGHSA enrichment
  72. 2026-08-04 01:24 UTCEG score recompute
  73. 2026-08-04 00:59 UTCEG score recompute
  74. 2026-08-04 00:58 UTCMITRE cvelistV5first tracked

Related CVEs(same vendor + same CWE)

Frequently asked(5)

What is CVE-2026-56846?
CVE-2026-56846 is a high vulnerability published on August 4, 2026. A flaw in Node.js HTTP/2 handling can cause HTTP/2 retained header blocks evade maxSessionMemory and enable remote memory exhaustion. This vulnerability affects Node.js 24.x and 22.x.
When was CVE-2026-56846 disclosed?
CVE-2026-56846 was first published in the National Vulnerability Database on August 4, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-56846 actively exploited?
CVE-2026-56846 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 52.8% of all scored CVEs.
What is the CVSS score of CVE-2026-56846?
CVE-2026-56846 has a CVSS v3 base score of 7.5 (NVD).
How do I remediate CVE-2026-56846?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-56846, 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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