CVE-2026-56850

MEDIUMNVD 4.44.4
EchelonGraph scoreMEDIUM confidence

“—” beside the score: it is equal to NVD's CVSS score.

This medium-severity CVE scores 4.4 under NVD CVSS v3. EPSS exploit probability: <0.1% (below the 1st percentile of EPSS-scored CVEs). GitHub Security Advisory CVSS 4.1 is lower than this score; a lower GitHub score revises it only when its advisory is newer than the CVE record's last change, and this advisory (published 2026-07-30) is not newer than that change (2026-10-23), so it does not.

Triggered by: Headline CVSS from NVD CVSS v3
Sources: EPSS, GitHub Security Advisory, NVD CVSS v3

Also known asEUVD-2026-51020 (ENISA EUVD) · GHSA-777r-4cwx-g26v (GitHub Security Advisories)Source: ENISA EUVD

4.4EG
EchelonGraph verdictMonitorRemediate within your standard update timelines (the SSVC decision on this page).
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: <0.1%CVSS: 4.4Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

A flaw in Node.js HTTPS Agent connection reuse can cause PFX object-array key collisions, allowing mutual TLS (mTLS) client identities to be reused across requests configured with different client certificates. This vulnerability affects Node.js 26.x, 24.x, and 22.x.

CVSS v3
4.4
EG Score
4.4MEDIUMmedium confidence
EG Risk
20
EG Risk 20/100

EG Risk is EchelonGraph's 0–100 priority score. It fuses impact severity (EG Severity, the CVSS base score, never the KEV-floored or EPSS-lifted EG Score) with real-world exploitation and automatability, under weights EchelonGraph set by hand, so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner.

How it’s computed (value × EchelonGraph’s weight)
Severity44% × 45%
Impact severity (EG Severity): CVSS 4.4 of 10. Never the KEV-floored or EPSS-lifted EG Score.
Exploitation<0.1% × 40%
FIRST EPSS: the 30-day exploitation probability when EchelonGraph scored this CVE.
Automatability0% × 15%
CISA's SSVC Automatable value: no (Vulnrichment).
SSVC (CISA's decision table, applied by EchelonGraph): Track at every mission impact level.
Exploitation none (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE.
Action: A fix is available. Apply it within your standard update timelines.
EPSS PROB
<0.1%
EPSS %ILE
below the 1st
KEV
Not listed

What the EG score is made of (scorer v4.0: the three questions the 0–10 score mixes, published apart · methodology)

The EG score (4.4): severity, escalated by confirmed exploitation. This CVE's 4.4 is its impact severity (EG Severity), not escalated.

EG Severity
4.4 MEDIUMCVSS-B, impact only: no KEV listing, EPSS or EG-KEV tier raises it.NVD CVSS v3 · CVSS v3.0 or v3.1
EG Likelihood
<0.1% within 30 daysSource: FIRST EPSS (model v2026.06.15, score date 2026-10-24). FIRST's exploitation probability, not an EchelonGraph model.
Confirmed exploitation
None on record (CISA KEV, EG-KEV Tier 1)Reported apart from the likelihood: an observed fact, not a probability.
EG Priority
SSVC Track at medium mission impactTrack at every mission impact level.CISA BOD 26-04: 60 days if the affected system is publicly exposed; Fix on system upgrade if it is not.Each input and its source: the SSVC and BOD 26-04 blocks below.

SSVC (CISA's decision table, applied by EchelonGraph)Track at every mission impact level.

A fix is available. Apply it within your standard update timelines.

Exploitation none (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE. Mission impact is CISA's Mission & Well-being decision point, and only you can judge it. CISA's table makes it high when Mission Prevalence is Essential — the vulnerable component "directly provides capabilities that constitute at least one MEF for at least one entity" (MEF: mission essential function) — or when Public Well-Being Impact is Irreversible: "multiple fatalities are likely", the cyber-physical system "is likely lost or destroyed", "extreme or serious externalities" are imposed on other parties, or social systems such as elections or the financial grid "are destabilized and potentially collapse". CISA's decision table

BOD 26-04 (CISA's remediation timeline, Table 1)60 days if the affected system is publicly exposed; Fix on system upgrade if it is not.

In CISA KEV no (CISA's KEV catalog) · Automatable no (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). Whether your system is publicly exposed is yours to answer. BOD 26-04 binds US Federal Civilian Executive Branch agencies; for anyone else it is CISA's published timeline, a reference rather than an obligation. The directive · how EchelonGraph applies it

Published

July 30, 2026

Last Modified

October 23, 2026

Advisory Details (1)

Auto-updated Jul 30, 2026
Patch available.
Web page

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

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

Vendor Advisories for CVE-2026-56850(13)

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

Patch Availability(11)

Vendor / EcosystemFix (by version range) / PatchReleasedSource
redhatnodejs22-1:22.23.2-1.el10_02026-09-08redhat
redhatnodejs:22-9060020260901085634.rhel92026-09-02redhat
redhatnodejs:24-8100020260819113942.6d8804032026-09-02redhat
redhatnodejs:22-8100020260819113925.6d8804032026-09-01redhat
redhatnodejs:22-9080020260819113937.rhel92026-08-31redhat
redhatnodejs:24-9080020260819113946.rhel92026-08-31redhat
redhatnodejs22-1:22.23.2-1.el10_22026-08-31redhat
redhatnodejs24-1:24.19.0-1.el10_22026-08-31redhat
redhatnodejs24-main-24.18.1-0.1.hum12026-07-30redhat
redhatnodejs22-main-22.23.2-2.3.hum12026-07-29redhat
redhatnodejs26-main-26.5.1-1.5.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 rangeFix by version rangeDependents
nodejs—
  • every version up to 22.23.2-r0: fixed in 22.23.2-r0
—
Alpine:v3.22(1)
PackageVulnerable rangeFix by version rangeDependents
nodejs—
  • every version up to 22.23.2-r0: fixed in 22.23.2-r0
—
Alpine:v3.23(1)
PackageVulnerable rangeFix by version rangeDependents
nodejs—
  • every version up to 24.18.1-r0: fixed in 24.18.1-r0
—
Alpine:v3.24(1)
PackageVulnerable rangeFix by version rangeDependents
nodejs—
  • every version up to 24.18.1-r0: fixed in 24.18.1-r0
—
Debian:11(1)
PackageVulnerable rangeFix by version rangeDependents
nodejs12.21.0~dfsg-5 ... 24.18.0+dfsg+~cs24.13.2-1 (174 versions)
  • every version on: no fix on record
—
Debian:12(1)
PackageVulnerable rangeFix by version rangeDependents
nodejs18.13.0+dfsg1-1 ... 18.20.4+dfsg-1~deb12u2 (22 versions)
  • every version up to 18.20.4+dfsg-1~deb12u3: fixed in 18.20.4+dfsg-1~deb12u3
—
Debian:13(1)
PackageVulnerable rangeFix by version rangeDependents
nodejs20.19.2+dfsg-1, 20.19.2+dfsg-1+deb13u1, 20.19.2+dfsg-1+deb13u2
  • every version up to 20.19.2+dfsg-1+deb13u3: fixed in 20.19.2+dfsg-1+deb13u3
—
Debian:14(1)
PackageVulnerable rangeFix by version rangeDependents
nodejs20.19.2+dfsg-1 ... 24.18.0+dfsg+~cs24.13.2-1 (40 versions)
  • every version up to 24.19.0+dfsg+~cs24.13.3-1: fixed in 24.19.0+dfsg+~cs24.13.3-1
—

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 6× in last 7d / 46× in last 30d)

Each row is a time one of our pipelines fetched, updated or re-scored this CVE. 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. An arrow marks a change the record states ("CVSS v3 → 9.1"); EPSS and GHSA rows show the values recorded at that time, not what changed (EPSS values are rounded; hover one for the exact figures). Most recent first.

Showing the most recent 100 of 230 refreshes on record for this CVE.

A repeat, a row identical to one the same pipeline wrote less than 10 seconds earlier, is not a separate refresh and is not counted. None are among the latest 100 rows. The 130 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

  1. 2026-10-31 16:33 UTCEPSS rescoreEPSS <0.1% · below the 1st percentile
  2. 2026-10-30 16:34 UTCEPSS rescoreEPSS <0.1% · below the 1st percentile
  3. 2026-10-29 16:33 UTCEPSS rescoreEPSS <0.1% · below the 1st percentile
  4. 2026-10-28 16:32 UTCEPSS rescoreEPSS <0.1% · below the 1st percentile
  5. 2026-10-25 16:33 UTCEPSS rescoreEPSS <0.1% · below the 1st percentile
  6. 2026-10-25 14:17 UTCEG score recompute
  7. 2026-10-24 16:33 UTCEPSS rescoreEPSS <0.1% · below the 1st percentile
  8. 2026-10-23 22:30 UTCEG score recompute
  9. 2026-10-23 22:30 UTCVendor advisory
  10. 2026-10-23 22:30 UTCGHSA enrichmentGHSA-777r-4cwx-g26v · GitHub CVSS 4.1
  11. 2026-10-23 16:32 UTCEPSS rescoreEPSS <0.1% · below the 1st percentile
  12. 2026-10-22 21:08 UTCEG score recompute
  13. 2026-10-22 21:08 UTCVendor advisory
  14. 2026-10-22 21:08 UTCGHSA enrichmentGHSA-777r-4cwx-g26v · GitHub CVSS 4.1
  15. 2026-10-21 16:33 UTCEPSS rescoreEPSS <0.1% · below the 1st percentile
  16. 2026-10-19 16:32 UTCEPSS rescoreEPSS <0.1% · below the 1st percentile
  17. 2026-10-18 03:29 UTCEG score recompute
  18. 2026-10-15 16:32 UTCEPSS rescoreEPSS <0.1% · below the 1st percentile
  19. 2026-10-14 16:33 UTCEPSS rescoreEPSS <0.1% · below the 1st percentile
  20. 2026-10-12 16:34 UTCEPSS rescoreEPSS <0.1% · below the 1st percentile
  21. 2026-10-12 15:54 UTCEG score recompute
  22. 2026-10-11 19:37 UTCEG score recompute
  23. 2026-10-11 16:53 UTCEG score recompute
  24. 2026-10-11 14:15 UTCEG score recompute
  25. 2026-10-10 20:00 UTCEPSS rescoreEPSS <0.1% · below the 1st percentile
Show 75 more
  1. 2026-10-09 20:07 UTCEPSS rescoreEPSS <0.1% · below the 1st percentile
  2. 2026-10-08 17:13 UTCEPSS rescoreEPSS <0.1% · below the 1st percentile
  3. 2026-10-07 23:48 UTCEPSS rescoreEPSS <0.1% · below the 1st percentile
  4. 2026-10-06 23:54 UTCEG score recompute
  5. 2026-10-06 23:54 UTCVendor advisory
  6. 2026-10-06 23:54 UTCGHSA enrichmentGHSA-777r-4cwx-g26v · GitHub CVSS 4.1
  7. 2026-10-06 15:18 UTCEPSS rescoreEPSS <0.1% · below the 1st percentile
  8. 2026-10-05 20:02 UTCEG score recompute
  9. 2026-10-05 20:02 UTCVendor advisory
  10. 2026-10-05 20:02 UTCGHSA enrichmentGHSA-777r-4cwx-g26v · GitHub CVSS 4.1
  11. 2026-10-05 17:43 UTCEPSS rescoreEPSS <0.1% · below the 1st percentile
  12. 2026-10-04 23:22 UTCEPSS rescoreEPSS <0.1% · below the 1st percentile
  13. 2026-10-04 06:43 UTCEG score recompute
  14. 2026-10-04 06:43 UTCVendor advisory
  15. 2026-10-04 06:43 UTCGHSA enrichmentGHSA-777r-4cwx-g26v · GitHub CVSS 4.1
  16. 2026-10-03 14:26 UTCEPSS rescoreEPSS <0.1% · below the 1st percentile
  17. 2026-10-02 17:56 UTCEPSS rescoreEPSS <0.1% · below the 1st percentile
  18. 2026-10-02 17:01 UTCEG score recompute
  19. 2026-10-02 17:01 UTCVendor advisory
  20. 2026-10-02 17:01 UTCGHSA enrichmentGHSA-777r-4cwx-g26v · GitHub CVSS 4.1
  21. 2026-10-01 19:50 UTCEPSS rescoreEPSS <0.1% · below the 1st percentile
  22. 2026-10-01 03:12 UTCEG score recompute
  23. 2026-10-01 03:12 UTCVendor advisory
  24. 2026-10-01 03:12 UTCGHSA enrichmentGHSA-777r-4cwx-g26v · GitHub CVSS 4.1
  25. 2026-09-30 15:03 UTCEPSS rescoreEPSS <0.1% · below the 1st percentile
  26. 2026-09-29 15:22 UTCEPSS rescoreEPSS <0.1% · below the 1st percentile
  27. 2026-09-29 06:56 UTCEG score recompute
  28. 2026-09-29 06:56 UTCVendor advisory
  29. 2026-09-29 06:56 UTCGHSA enrichmentGHSA-777r-4cwx-g26v · GitHub CVSS 4.1
  30. 2026-09-28 13:51 UTCEPSS rescoreEPSS <0.1% · below the 1st percentile
  31. 2026-09-27 19:04 UTCEG score recompute
  32. 2026-09-27 19:04 UTCVendor advisory
  33. 2026-09-27 19:04 UTCGHSA enrichmentGHSA-777r-4cwx-g26v · GitHub CVSS 4.1
  34. 2026-09-27 13:48 UTCEPSS rescoreEPSS <0.1% · below the 1st percentile
  35. 2026-09-26 15:59 UTCEPSS rescoreEPSS <0.1% · below the 1st percentile
  36. 2026-09-25 04:58 UTCEG score recompute
  37. 2026-09-25 04:58 UTCVendor advisory
  38. 2026-09-25 04:58 UTCGHSA enrichmentGHSA-777r-4cwx-g26v · GitHub CVSS 4.1
  39. 2026-09-24 14:04 UTCEPSS rescoreEPSS <0.1% · below the 1st percentile
  40. 2026-09-23 21:32 UTCEG score recompute
  41. 2026-09-23 21:32 UTCVendor advisory
  42. 2026-09-23 21:32 UTCGHSA enrichmentGHSA-777r-4cwx-g26v · GitHub CVSS 4.1
  43. 2026-09-23 17:54 UTCEPSS rescoreEPSS <0.1% · below the 1st percentile
  44. 2026-09-22 15:17 UTCVendor advisory
  45. 2026-09-22 15:17 UTCGHSA enrichmentGHSA-777r-4cwx-g26v · GitHub CVSS 4.1
  46. 2026-09-20 11:11 UTCEG score recompute
  47. 2026-09-20 11:11 UTCVendor advisory
  48. 2026-09-20 11:11 UTCGHSA enrichmentGHSA-777r-4cwx-g26v · GitHub CVSS 4.1
  49. 2026-09-19 08:04 UTCEG score recompute
  50. 2026-09-19 08:04 UTCVendor advisory
  51. 2026-09-19 08:03 UTCGHSA enrichmentGHSA-777r-4cwx-g26v · GitHub CVSS 4.1
  52. 2026-09-18 19:28 UTCEPSS rescoreEPSS <0.1% · below the 1st percentile
  53. 2026-09-18 08:10 UTCEG score recompute
  54. 2026-09-18 08:10 UTCVendor advisory
  55. 2026-09-18 08:10 UTCGHSA enrichmentGHSA-777r-4cwx-g26v · GitHub CVSS 4.1
  56. 2026-09-17 19:31 UTCEPSS rescoreEPSS <0.1% · below the 1st percentile
  57. 2026-09-17 08:19 UTCEG score recompute
  58. 2026-09-17 08:19 UTCVendor advisory
  59. 2026-09-17 08:19 UTCGHSA enrichmentGHSA-777r-4cwx-g26v · GitHub CVSS 4.1
  60. 2026-09-16 14:08 UTCEPSS rescoreEPSS <0.1% · below the 1st percentile
  61. 2026-09-16 07:00 UTCEG score recompute
  62. 2026-09-16 07:00 UTCVendor advisory
  63. 2026-09-16 07:00 UTCGHSA enrichmentGHSA-777r-4cwx-g26v · GitHub CVSS 4.1
  64. 2026-09-16 05:15 UTCEPSS rescoreEPSS <0.1% · below the 1st percentile
  65. 2026-09-15 07:09 UTCVendor advisory
  66. 2026-09-15 07:09 UTCGHSA enrichmentGHSA-777r-4cwx-g26v · GitHub CVSS 4.1
  67. 2026-09-14 06:49 UTCVendor advisory
  68. 2026-09-14 06:49 UTCGHSA enrichmentGHSA-777r-4cwx-g26v · GitHub CVSS 4.1
  69. 2026-09-13 06:58 UTCVendor advisory
  70. 2026-09-13 06:58 UTCGHSA enrichmentGHSA-777r-4cwx-g26v · GitHub CVSS 4.1
  71. 2026-09-12 06:56 UTCEG score recompute
  72. 2026-09-12 06:56 UTCVendor advisory
  73. 2026-09-12 06:56 UTCGHSA enrichmentGHSA-777r-4cwx-g26v · GitHub CVSS 4.1
  74. 2026-09-11 14:53 UTCEPSS rescoreEPSS <0.1% · below the 1st percentile
  75. 2026-09-11 07:05 UTCEG score recompute

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

Frequently asked(5)

What is CVE-2026-56850?
CVE-2026-56850 is a medium-severity vulnerability; its CVE record was published on July 30, 2026. A flaw in Node.js HTTPS Agent connection reuse can cause PFX object-array key collisions, allowing mutual TLS (mTLS) client identities to be reused across requests configured with different client certificates. This vulnerability affects Node.js 26.x, 24.x, and 22.x.
When was the CVE record for CVE-2026-56850 published?
The CVE record for CVE-2026-56850 was published on July 30, 2026. That is the record's publication date; the vulnerability itself may have been made public earlier. EchelonGraph's copy of the record carries a last-modified date of October 23, 2026; the record at its source may have been updated since.
Is CVE-2026-56850 actively exploited?
CVE-2026-56850 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a <0.1% probability of exploitation in the next 30 days (below the 1st percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-56850?
CVE-2026-56850 has a CVSS v3 base score of 4.4 (NVD).
How do I remediate CVE-2026-56850?
A fix for CVE-2026-56850 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-56850 are linked in the Vendor Advisories panel on this page.

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