CVE-2026-106555

HIGHNVD 7.57.5
EchelonGraph scoreMEDIUM confidence

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

This high-severity CVE scores 7.5 under NVD CVSS v3. EPSS exploit probability: 0.1% (3rd percentile of EPSS-scored CVEs). GitHub Security Advisory CVSS 2.2 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 2026-10-06) is not newer than that change (2026-10-13), so it does not.

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

Also known asEUVD-2026-93998 (ENISA EUVD) · GHSA-j45v-7hgc-xv9x (GitHub Security Advisories)Source: ENISA EUVD

7.5EG
EchelonGraph verdictPlan a fixRemediate within your standard update timelines (the SSVC decision on this page).
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0.1%CVSS: 7.5Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

In sshd in OpenSSH before 10.6, GSSAPIAuthentication authentication state can incorrectly be persisted across authentication attempts.

CVSS v3
7.5
EG Score
7.5HIGHmedium confidence
EG Risk
34
EG Risk 34/100

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)
Severity75% × 45%
Impact severity (EG Severity): CVSS 7.5 of 10. Never the KEV-floored or EPSS-lifted EG Score.
Exploitation0.1% × 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
3rd
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 (7.5): severity, escalated by confirmed exploitation. This CVE's 7.5 is its impact severity (EG Severity), not escalated.

EG Severity
7.5 HIGHCVSS-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 2026-11-09). 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, and whom BOD 26-04 binds: 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.

The score's inputs: 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

October 6, 2026

Last Modified

October 13, 2026

Advisory Details (1)

Auto-updated Oct 13, 2026
Patch available.
Web page

OpenSSH: Release Notes

https://www.openssh.org/releasenotes.html#10.6

Vendor Advisories for CVE-2026-106555(3)

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

Patch Availability(3)

Vendor / EcosystemFix (by version range) / PatchReleasedSource
ubuntussh-askpass-gnome (1:10.2p1-2ubuntu3.8) @ resolute2026-11-03ubuntu
ubuntussh-askpass-gnome (1:10.5p1-1ubuntu3.1) @ stonking2026-11-03ubuntu
redhatopenssh-main-10.5p1-1.3.hum12026-10-19redhat

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

(4 across 3 ecosystems)
Debian:14(2)
PackageVulnerable rangeFix by version rangeDependents
openssh1:10.0p1-7 ... 1:10.5p1-1 (27 versions)
  • every version up to 1:10.6p1-1: fixed in 1:10.6p1-1
—
openssh-gssapi1:10.4p1-5, 1:10.5p1-1
  • every version up to 1:10.6p1-1: fixed in 1:10.6p1-1
—
Debian:12(1)
PackageVulnerable rangeFix by version rangeDependents
openssh1:10.0p1-1 ... 1:9.9p2-2 (78 versions)
  • every version on: no fix on record
—
Debian:13(1)
PackageVulnerable rangeFix by version rangeDependents
openssh1:10.0p1-7 ... 1:10.6p1-1 (32 versions)
  • every version on: no fix on record
—

Weakness Classification(1)

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

Additional Vendor Advisories

(2)

Vendors that published advisories for this CVE beyond the curated set above. Broader coverage but minimal per-row detail — click through for the original advisory.

Data Freshness Timeline

(refreshed 8× in last 7d / 37× 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 its CVE.org record (CNA or CISA ADP). 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). "EchelonGraph re-scored" is our own recompute of this CVE's score, not an update from a source, and is not counted in the refreshes above. Most recent first.

  1. 2026-11-12 16:32 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  2. 2026-11-11 16:37 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  3. 2026-11-10 16:41 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  4. 2026-11-09 21:48 UTCEchelonGraph re-scored
  5. 2026-11-09 21:48 UTCGHSA enrichmentGHSA-j45v-7hgc-xv9x · GitHub severity LOW · GitHub CVSS 2.2
  6. 2026-11-09 16:34 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  7. 2026-11-08 16:38 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  8. 2026-11-07 16:38 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  9. 2026-11-06 16:35 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  10. 2026-11-05 16:36 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  11. 2026-11-04 16:34 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  12. 2026-11-03 16:46 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  13. 2026-11-03 08:24 UTCEchelonGraph re-scored
  14. 2026-11-03 08:24 UTCVendor advisory
  15. 2026-11-03 08:24 UTCGHSA enrichmentGHSA-j45v-7hgc-xv9x · GitHub severity LOW · GitHub CVSS 2.2
  16. 2026-11-02 16:43 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  17. 2026-11-01 16:33 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  18. 2026-10-31 16:31 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  19. 2026-10-30 16:33 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  20. 2026-10-29 16:32 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  21. 2026-10-28 16:31 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  22. 2026-10-27 18:59 UTCEchelonGraph re-scored
  23. 2026-10-27 18:59 UTCVendor advisory
  24. 2026-10-27 18:59 UTCGHSA enrichmentGHSA-j45v-7hgc-xv9x · GitHub severity LOW · GitHub CVSS 2.2
  25. 2026-10-27 16:31 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
Show 42 more
  1. 2026-10-26 16:30 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  2. 2026-10-25 16:32 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
  3. 2026-10-25 14:54 UTCEchelonGraph re-scored
  4. 2026-10-24 16:32 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  5. 2026-10-23 16:31 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  6. 2026-10-22 16:33 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  7. 2026-10-21 16:32 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  8. 2026-10-20 16:32 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  9. 2026-10-20 09:56 UTCEchelonGraph re-scored
  10. 2026-10-20 09:56 UTCVendor advisory
  11. 2026-10-20 09:56 UTCGHSA enrichmentGHSA-j45v-7hgc-xv9x · GitHub severity LOW · GitHub CVSS 2.2
  12. 2026-10-19 16:31 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  13. 2026-10-18 16:31 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  14. 2026-10-18 05:08 UTCEchelonGraph re-scored
  15. 2026-10-17 16:33 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  16. 2026-10-16 16:40 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  17. 2026-10-15 16:31 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  18. 2026-10-14 16:32 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  19. 2026-10-13 16:33 UTCEPSS rescoreEPSS <0.1% · below the 1st percentile
  20. 2026-10-13 15:07 UTCEchelonGraph re-scored▲ 5.30
  21. 2026-10-13 15:07 UTCVendor advisory
  22. 2026-10-13 15:07 UTCGHSA enrichmentGHSA-j45v-7hgc-xv9x · GitHub severity LOW · GitHub CVSS 2.2
  23. 2026-10-13 15:04 UTCNVD updateCVSS v3 → 7.5 · severity → HIGH
  24. 2026-10-12 16:39 UTCEchelonGraph re-scored
  25. 2026-10-12 16:33 UTCEPSS rescoreEPSS <0.1% · below the 1st percentile
  26. 2026-10-12 00:17 UTCVendor advisory
  27. 2026-10-12 00:17 UTCGHSA enrichmentGHSA-j45v-7hgc-xv9x · GitHub severity LOW · GitHub CVSS 2.2
  28. 2026-10-11 20:14 UTCEchelonGraph re-scored
  29. 2026-10-11 18:26 UTCEchelonGraph re-scored
  30. 2026-10-11 15:00 UTCEchelonGraph re-scored
  31. 2026-10-10 19:59 UTCEPSS rescoreEPSS <0.1% · below the 1st percentile
  32. 2026-10-09 02:18 UTCEchelonGraph re-scored
  33. 2026-10-09 02:18 UTCGHSA enrichmentGHSA-j45v-7hgc-xv9x · GitHub severity LOW · GitHub CVSS 2.2
  34. 2026-10-09 01:58 UTCEchelonGraph re-scored
  35. 2026-10-09 01:58 UTCGHSA enrichmentGHSA-j45v-7hgc-xv9x · GitHub severity LOW · GitHub CVSS 2.2
  36. 2026-10-08 17:11 UTCEPSS rescoreEPSS <0.1% · below the 1st percentile
  37. 2026-10-07 23:47 UTCEPSS rescoreEPSS <0.1% · below the 1st percentile
  38. 2026-10-07 14:49 UTCGHSA enrichmentGHSA-j45v-7hgc-xv9x · GitHub severity LOW · GitHub CVSS 2.2
  39. 2026-10-06 21:32 UTCEchelonGraph re-scored
  40. 2026-10-06 21:32 UTCGHSA enrichmentGHSA-j45v-7hgc-xv9x · GitHub severity LOW · GitHub CVSS 2.2
  41. 2026-10-06 20:37 UTCEchelonGraph re-scoredFirst assessed: 2.2 LOW
  42. 2026-10-06 20:36 UTCMITRE cvelistV5first tracked

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

Frequently asked(5)

What is CVE-2026-106555?
CVE-2026-106555 is a high-severity vulnerability; its CVE record was published on October 6, 2026. In sshd in OpenSSH before 10.6, GSSAPIAuthentication authentication state can incorrectly be persisted across authentication attempts.
When was the CVE record for CVE-2026-106555 published?
The CVE record for CVE-2026-106555 was published on October 6, 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 13, 2026; the record at its source may have been updated since.
Is CVE-2026-106555 actively exploited?
CVE-2026-106555 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.1% probability of exploitation in the next 30 days (3rd percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-106555?
CVE-2026-106555 has a CVSS v3 base score of 7.5 (NVD).
How do I remediate CVE-2026-106555?
A fix for CVE-2026-106555 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-106555 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

See which npm, PyPI, Go, and Maven packages are affected by CVE-2026-106555

Explore →

Is Your Infrastructure Affected by CVE-2026-106555?

EchelonGraph automatically scans your cloud infrastructure and maps CVE exposure using blast radius analysis.

Book a Demo →Browse All CVEs