CVE-2026-101306

CRITICALPre-NVD 9.89.8
EchelonGraph scoreHIGH confidence

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

Score 9.8 from GitHub Security Advisory (severity: CRITICAL) published 2026-10-15. CISA-ADP (Vulnrichment) CVSS v3.1 baseline 9.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: CISA-ADP (Vulnrichment) CVSS v3.1, EPSS, GitHub Security Advisory

Also known asEUVD-2026-101867 (ENISA EUVD) · GHSA-3c4j-rmc7-2x5m (GitHub Security Advisories)Source: ENISA EUVD

9.8EG
EchelonGraph verdictPlan mitigationNo release containing the referenced fix is confirmed: check the referenced fix and the vendor's advisory for a release that contains it; until one is applied, restrict network exposure of the affected system or apply the vendor's mitigation on your normal schedule at low or medium mission impact and sooner than that at high (the SSVC decision on this page).
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0.3%CVSS: 9.8Exploit: None knownExposed services: Not assessed

A fix is referenced (a reference tagged "Patch", often a source commit), but no release containing it is confirmed — find the release that contains it; until it is applied, mitigate (WAF / firewall / segmentation).

SCM_RIGHTS file descriptor passing did not preserve FD_RESOLVE_BENEATH when a descriptor was transferred. A process could clear the restriction by sending the descriptor to itself over a Unix domain socket.

A process in a jail that has received a directory file descriptor from another jail can use these techniques to escape the jail's filesystem root restriction.

CVSS v3
9.8
EG Score
9.8CRITICALhigh confidence
EG Risk
59
EG Risk 59/100

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)
Severity98% × 45%
Impact severity (EG Severity): CVSS 9.8 of 10. Never the KEV-floored or EPSS-lifted EG Score.
Exploitation0.3% × 40%
FIRST EPSS: the 30-day exploitation probability when EchelonGraph scored this CVE.
Automatability100% × 15%
CISA's SSVC Automatable value: yes (Vulnrichment).
SSVC (CISA's decision table, applied by EchelonGraph): Track at low or medium mission impact; Attend at high (mission-essential systems).
Exploitation none (CISA Vulnrichment) · Automatable yes (CISA Vulnrichment) · Technical impact total (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 referenced, but no release containing it is confirmed. Check the referenced fix and the vendor's advisory for a release that contains it; until one is applied, restrict network exposure of the affected system or apply the vendor's mitigation on your normal schedule at low or medium mission impact and sooner than that at high.
EPSS PROB
0.3%
EPSS %ILE
19th
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 (9.8): severity, escalated by confirmed exploitation. This CVE's 9.8 is its impact severity (EG Severity), not escalated.

EG Severity
9.8 CRITICALCVSS-B, impact only: no KEV listing, EPSS or EG-KEV tier raises it.GitHub Security Advisory CVSS
EG Likelihood
0.3% within 30 daysSource: FIRST EPSS (model v2026.06.15, score date 2026-11-12). 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 low or medium mission impact; Attend at high (mission-essential systems).CISA BOD 26-04: 3 days if the affected system is publicly exposed; 60 days if it is not.No released fix is confirmed on this page, but CISA's timeline does not wait for a fix's release: it starts when an agency identifies the flaw on an asset and updates the CDM Agency and Federal Dashboard, and the directive counts patching, decommissioning the system or another action as remediation. Until a fixed release is applied, mitigate as this page's verdict says.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 low or medium mission impact; Attend at high (mission-essential systems).

A fix is referenced, but no release containing it is confirmed. Check the referenced fix and the vendor's advisory for a release that contains it; until one is applied, restrict network exposure of the affected system or apply the vendor's mitigation on your normal schedule at low or medium mission impact and sooner than that at high.

Exploitation none (CISA Vulnrichment) · Automatable yes (CISA Vulnrichment) · Technical impact total (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)3 days if the affected system is publicly exposed; 60 days if it is not.

No released fix is confirmed on this page, but CISA's timeline does not wait for a fix's release: it starts when an agency identifies the flaw on an asset and updates the CDM Agency and Federal Dashboard, and the directive counts patching, decommissioning the system or another action as remediation. Until a fixed release is applied, mitigate as this page's verdict says.

The score's inputs: In CISA KEV no (CISA's KEV catalog) · Automatable yes (CISA Vulnrichment) · Technical impact total (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 15, 2026

Last Modified

October 20, 2026

Advisory Details (1)

Auto-updated Nov 7, 2026
Fix referenced — no release confirmed yet.

Vendor Advisories for CVE-2026-101306(1)

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

Weakness Classification(2)

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

Data Freshness Timeline

(refreshed 14× in last 7d / 63× 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. 2026-11-13 05:22 UTCEchelonGraph re-scored
  2. 2026-11-13 05:22 UTCGHSA enrichmentGHSA-3c4j-rmc7-2x5m · GitHub severity CRITICAL · GitHub CVSS 9.8
  3. 2026-11-12 16:32 UTCEPSS rescoreEPSS 0.3% · 19th percentile
  4. 2026-11-12 05:21 UTCEchelonGraph re-scored
  5. 2026-11-12 05:21 UTCGHSA enrichmentGHSA-3c4j-rmc7-2x5m · GitHub severity CRITICAL · GitHub CVSS 9.8
  6. 2026-11-11 16:37 UTCEPSS rescoreEPSS 0.3% · 19th percentile
  7. 2026-11-11 05:19 UTCEchelonGraph re-scored
  8. 2026-11-11 05:19 UTCGHSA enrichmentGHSA-3c4j-rmc7-2x5m · GitHub severity CRITICAL · GitHub CVSS 9.8
  9. 2026-11-10 16:41 UTCEPSS rescoreEPSS 0.3% · 19th percentile
  10. 2026-11-10 05:17 UTCEchelonGraph re-scored
  11. 2026-11-10 05:17 UTCGHSA enrichmentGHSA-3c4j-rmc7-2x5m · GitHub severity CRITICAL · GitHub CVSS 9.8
  12. 2026-11-09 16:33 UTCEPSS rescoreEPSS 0.3% · 19th percentile
  13. 2026-11-09 05:15 UTCEchelonGraph re-scored
  14. 2026-11-09 05:15 UTCGHSA enrichmentGHSA-3c4j-rmc7-2x5m · GitHub severity CRITICAL · GitHub CVSS 9.8
  15. 2026-11-08 16:37 UTCEPSS rescoreEPSS 0.3% · 19th percentile
  16. 2026-11-08 05:14 UTCEchelonGraph re-scored
  17. 2026-11-08 05:14 UTCGHSA enrichmentGHSA-3c4j-rmc7-2x5m · GitHub severity CRITICAL · GitHub CVSS 9.8
  18. 2026-11-07 16:37 UTCEPSS rescoreEPSS 0.3% · 19th percentile
  19. 2026-11-07 05:12 UTCEchelonGraph re-scored
  20. 2026-11-07 05:12 UTCGHSA enrichmentGHSA-3c4j-rmc7-2x5m · GitHub severity CRITICAL · GitHub CVSS 9.8
  21. 2026-11-06 16:35 UTCEPSS rescoreEPSS 0.3% · 19th percentile
  22. 2026-11-06 05:11 UTCEchelonGraph re-scored
  23. 2026-11-06 05:11 UTCGHSA enrichmentGHSA-3c4j-rmc7-2x5m · GitHub severity CRITICAL · GitHub CVSS 9.8
  24. 2026-11-05 16:36 UTCEPSS rescoreEPSS 0.3% · 19th percentile
  25. 2026-11-05 05:10 UTCEchelonGraph re-scored
Show 70 more
  1. 2026-11-05 05:10 UTCGHSA enrichmentGHSA-3c4j-rmc7-2x5m · GitHub severity CRITICAL · GitHub CVSS 9.8
  2. 2026-11-04 16:34 UTCEPSS rescoreEPSS 0.3% · 19th percentile
  3. 2026-11-04 05:09 UTCEchelonGraph re-scored
  4. 2026-11-04 05:09 UTCGHSA enrichmentGHSA-3c4j-rmc7-2x5m · GitHub severity CRITICAL · GitHub CVSS 9.8
  5. 2026-11-03 16:45 UTCEPSS rescoreEPSS 0.3% · 19th percentile
  6. 2026-11-03 05:07 UTCEchelonGraph re-scored
  7. 2026-11-03 05:07 UTCGHSA enrichmentGHSA-3c4j-rmc7-2x5m · GitHub severity CRITICAL · GitHub CVSS 9.8
  8. 2026-11-02 16:43 UTCEPSS rescoreEPSS 0.3% · 18th percentile
  9. 2026-11-02 05:05 UTCEchelonGraph re-scored
  10. 2026-11-02 05:05 UTCGHSA enrichmentGHSA-3c4j-rmc7-2x5m · GitHub severity CRITICAL · GitHub CVSS 9.8
  11. 2026-11-01 16:33 UTCEPSS rescoreEPSS 0.3% · 19th percentile
  12. 2026-11-01 05:04 UTCEchelonGraph re-scored
  13. 2026-11-01 05:04 UTCGHSA enrichmentGHSA-3c4j-rmc7-2x5m · GitHub severity CRITICAL · GitHub CVSS 9.8
  14. 2026-10-31 16:31 UTCEPSS rescoreEPSS 0.3% · 19th percentile
  15. 2026-10-31 05:03 UTCEchelonGraph re-scored
  16. 2026-10-31 05:03 UTCGHSA enrichmentGHSA-3c4j-rmc7-2x5m · GitHub severity CRITICAL · GitHub CVSS 9.8
  17. 2026-10-30 16:33 UTCEPSS rescoreEPSS 0.3% · 19th percentile
  18. 2026-10-30 05:01 UTCEchelonGraph re-scored
  19. 2026-10-30 05:01 UTCGHSA enrichmentGHSA-3c4j-rmc7-2x5m · GitHub severity CRITICAL · GitHub CVSS 9.8
  20. 2026-10-29 16:32 UTCEPSS rescoreEPSS 0.3% · 18th percentile
  21. 2026-10-29 04:59 UTCEchelonGraph re-scored
  22. 2026-10-29 04:59 UTCGHSA enrichmentGHSA-3c4j-rmc7-2x5m · GitHub severity CRITICAL · GitHub CVSS 9.8
  23. 2026-10-28 16:31 UTCEPSS rescoreEPSS 0.3% · 18th percentile
  24. 2026-10-28 04:58 UTCEchelonGraph re-scored
  25. 2026-10-28 04:58 UTCGHSA enrichmentGHSA-3c4j-rmc7-2x5m · GitHub severity CRITICAL · GitHub CVSS 9.8
  26. 2026-10-27 16:31 UTCEPSS rescoreEPSS 0.3% · 18th percentile
  27. 2026-10-27 04:57 UTCEchelonGraph re-scored
  28. 2026-10-27 04:56 UTCGHSA enrichmentGHSA-3c4j-rmc7-2x5m · GitHub severity CRITICAL · GitHub CVSS 9.8
  29. 2026-10-26 16:30 UTCEPSS rescoreEPSS 0.3% · 18th percentile
  30. 2026-10-26 00:46 UTCEchelonGraph re-scored
  31. 2026-10-26 00:46 UTCGHSA enrichmentGHSA-3c4j-rmc7-2x5m · GitHub severity CRITICAL · GitHub CVSS 9.8
  32. 2026-10-25 16:32 UTCEPSS rescoreEPSS 0.3% · 18th percentile
  33. 2026-10-25 15:57 UTCEchelonGraph re-scored
  34. 2026-10-25 00:42 UTCEchelonGraph re-scored
  35. 2026-10-25 00:42 UTCGHSA enrichmentGHSA-3c4j-rmc7-2x5m · GitHub severity CRITICAL · GitHub CVSS 9.8
  36. 2026-10-24 16:31 UTCEPSS rescoreEPSS 0.3% · 18th percentile
  37. 2026-10-24 00:41 UTCEchelonGraph re-scored
  38. 2026-10-24 00:41 UTCGHSA enrichmentGHSA-3c4j-rmc7-2x5m · GitHub severity CRITICAL · GitHub CVSS 9.8
  39. 2026-10-23 16:31 UTCEPSS rescoreEPSS 0.3% · 17th percentile
  40. 2026-10-23 00:39 UTCEchelonGraph re-scored
  41. 2026-10-23 00:39 UTCGHSA enrichmentGHSA-3c4j-rmc7-2x5m · GitHub severity CRITICAL · GitHub CVSS 9.8
  42. 2026-10-22 16:33 UTCEPSS rescoreEPSS 0.3% · 17th percentile
  43. 2026-10-22 00:35 UTCEchelonGraph re-scored
  44. 2026-10-22 00:34 UTCGHSA enrichmentGHSA-3c4j-rmc7-2x5m · GitHub severity CRITICAL · GitHub CVSS 9.8
  45. 2026-10-21 16:31 UTCEPSS rescoreEPSS 0.3% · 17th percentile
  46. 2026-10-21 00:30 UTCEchelonGraph re-scored
  47. 2026-10-21 00:30 UTCGHSA enrichmentGHSA-3c4j-rmc7-2x5m · GitHub severity CRITICAL · GitHub CVSS 9.8
  48. 2026-10-20 16:31 UTCEPSS rescoreEPSS 0.3% · 17th percentile
  49. 2026-10-20 00:25 UTCGHSA enrichmentGHSA-3c4j-rmc7-2x5m · GitHub severity CRITICAL · GitHub CVSS 9.8
  50. 2026-10-19 21:00 UTCEchelonGraph re-scored
  51. 2026-10-19 21:00 UTCGHSA enrichmentGHSA-3c4j-rmc7-2x5m · GitHub severity CRITICAL · GitHub CVSS 9.8
  52. 2026-10-19 16:31 UTCEPSS rescoreEPSS 0.3% · 17th percentile
  53. 2026-10-18 19:33 UTCEchelonGraph re-scored
  54. 2026-10-18 19:33 UTCGHSA enrichmentGHSA-3c4j-rmc7-2x5m · GitHub severity CRITICAL · GitHub CVSS 9.8
  55. 2026-10-18 16:31 UTCEPSS rescoreEPSS 0.3% · 17th percentile
  56. 2026-10-18 05:11 UTCEchelonGraph re-scored
  57. 2026-10-17 19:30 UTCEchelonGraph re-scored
  58. 2026-10-17 19:29 UTCGHSA enrichmentGHSA-3c4j-rmc7-2x5m · GitHub severity CRITICAL · GitHub CVSS 9.8
  59. 2026-10-17 16:33 UTCEPSS rescoreEPSS 0.3% · 17th percentile
  60. 2026-10-16 19:27 UTCGHSA enrichmentGHSA-3c4j-rmc7-2x5m
  61. 2026-10-16 18:44 UTCEchelonGraph re-scoredFirst assessed: 9.8 CRITICAL
  62. 2026-10-16 18:44 UTCGHSA enrichmentGHSA-3c4j-rmc7-2x5m
  63. 2026-10-16 18:42 UTCMITRE cvelistV5CVSS v3 → 9.8 · severity → CRITICAL
  64. 2026-10-16 16:40 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  65. 2026-10-15 16:38 UTCEchelonGraph re-scored
  66. 2026-10-15 16:38 UTCGHSA enrichmentGHSA-3c4j-rmc7-2x5m
  67. 2026-10-15 16:31 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  68. 2026-10-15 07:25 UTCNVD update
  69. 2026-10-15 06:59 UTCEchelonGraph re-scored
  70. 2026-10-15 06:58 UTCMITRE cvelistV5first tracked

Frequently asked(5)

What is CVE-2026-101306?
CVE-2026-101306 is a critical-severity vulnerability; its CVE record was published on October 15, 2026. SCM_RIGHTS file descriptor passing did not preserve FD_RESOLVE_BENEATH when a descriptor was transferred. A process could clear the restriction by sending the descriptor to itself over a Unix domain socket. A process in a jail that has received a directory file descriptor from another jail can use…
When was CVE-2026-101306 made public?
CVE-2026-101306 was made public on September 29, 2026: that is the date its CVE record's CNA, FreeBSD, gives for when the vulnerability was made public. The CVE record itself was published on October 15, 2026. EchelonGraph's copy of the record carries a last-modified date of October 20, 2026; the record at its source may have been updated since.
Is CVE-2026-101306 actively exploited?
CVE-2026-101306 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.3% probability of exploitation in the next 30 days (19th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-101306?
CVE-2026-101306 has a CVSS v3.1 base score of 9.8 (CISA-ADP / Vulnrichment enrichment; NVD's own analysis pending).
How do I remediate CVE-2026-101306?
A fix for CVE-2026-101306 is referenced (a reference tagged "Patch", often a source commit), but EchelonGraph has no release containing it on record. Check that reference and the vendor's advisory for a release that contains the fix and update to it; until then, restrict network exposure of the affected system or apply the vendor's mitigation. The vendor advisories EchelonGraph has for CVE-2026-101306 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

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