CVE-2026-44740

MEDIUMNVD 6.56.5
EchelonGraph scoreMEDIUM confidence

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

This medium-severity CVE scores 6.5 under NVD CVSS v3. EPSS exploit probability: 0.4% (32nd percentile of EPSS-scored CVEs). No GitHub Security Advisory CVSS is on record for this CVE.

Triggered by: Headline CVSS from NVD CVSS v3
Sources: EPSS, NVD CVSS v3

Also known asEUVD-2026-33663 (ENISA EUVD) · GHSA-m3xc-h892-ggx6 (GitHub Security Advisories)Source: ENISA EUVD

6.5EG
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: 0.4%CVSS: 6.5Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

Billy is an interface filesystem abstraction for Go. Prior to versions 5.9.0 and 6.0.0-alpha.1, multiple components may improperly handle crafted or malformed input, resulting in panics, infinite loops, uncontrolled recursion, or excessive resource consumption. These issues arise from insufficient validation and missing safety mechanisms such as cycle detection, recursion limits, or defensive handling of unexpected states when processing untrusted repository data and filesystem structures. This issue has been patched in versions 5.9.0 and 6.0.0-alpha.1.

CVSS v3
6.5
EG Score
6.5MEDIUMmedium confidence
EG Risk
29
EG Risk 29/100

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)
Severity65% × 45%
Impact severity (EG Severity): CVSS 6.5 of 10. Never the KEV-floored or EPSS-lifted EG Score.
Exploitation0.4% × 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
0.4%
EPSS %ILE
32nd
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 (6.5): severity, escalated by confirmed exploitation. This CVE's 6.5 is its impact severity (EG Severity), not escalated.

EG Severity
6.5 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
0.4% 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

June 1, 2026

Last Modified

July 22, 2026

Advisory Details (3)

Auto-updated Jun 12, 2026
Patch available. Sources: github_release, github.
GitHub advisoryMentions a patch (unverified)

Improper input handling may cause panics, infinite loops, or uncontrolled resource consumption · Advisory · go-git/go-billy · GitHub

https://github.com/go-git/go-billy/security/advisories/GHSA-m3xc-h892-ggx6
GitHub release Patch Available

v6.0.0-alpha.1

Patch available: go-git/go-billy v6.0.0-alpha.1 (pre-release)

https://github.com/go-git/go-billy/releases/tag/v6.0.0-alpha.1
GitHub release Patch Available

v5.9.0

Patch available: go-git/go-billy v5.9.0

https://github.com/go-git/go-billy/releases/tag/v5.9.0

Patch Availability(29)

Vendor / EcosystemFix (by version range) / PatchReleasedSource
redhatrhoai/odh-data-science-pipelines-argo-workflowcontroller-rhel9:17918624652026-10-19redhat
redhatrhem/flightctl-worker-rhel9:17894880612026-09-16redhat
redhatrhem/flightctl-worker-rhel10:17894860712026-09-16redhat
redhatflightctl-0:1.1.4-1.el9em2026-09-16redhat
redhatrhem/flightctl-worker-rhel9:17894868292026-09-16redhat
redhatrhem/flightctl-worker-rhel10:17894867402026-09-16redhat
redhatflightctl-0:1.2.1-1.el92026-09-16redhat
redhatoadp/oadp-mustgather-rhel9:17888598962026-09-09redhat
redhatopenshift-gitops-1/gitops-rhel9-operator:17877295452026-09-03redhat
redhatcluster-observability-operator/perses-rhel9-operator:17875936972026-08-31redhat
redhatrhacm2/multicluster-operators-subscription-rhel9:17872635842026-08-26redhat
redhatrhacm2/multicluster-operators-subscription-rhel9:17871708302026-08-26redhat
redhatrhacm2/multicluster-operators-subscription-rhel9:17872421082026-08-26redhat
redhatmulticluster-engine/cluster-image-set-controller-rhel9:17869833622026-08-25redhat
redhatoadp/oadp-mustgather-rhel9:17869462942026-08-25redhat
redhatmulticluster-engine/cluster-image-set-controller-rhel9:17867646012026-08-25redhat
redhatmulticluster-engine/cluster-image-set-controller-rhel9:17869119572026-08-19redhat
redhatodf4/rook-ceph-rhel9-operator:17866295482026-08-19redhat
redhatrhacm2/multicluster-operators-subscription-rhel9:17869087772026-08-19redhat
redhatodf4/rook-ceph-rhel9-operator:17867031432026-08-18redhat
redhatexternal-secrets-operator/external-secrets-rhel9:17866146762026-08-13redhat
redhatrhacm2/kube-state-metrics-rhel9:17865493452026-08-12redhat
redhatoadp/oadp-mustgather-rhel9:17851773592026-08-06redhat
redhatrhtas/gitsign-rhel9:17853595472026-08-05redhat
redhatrhacm2/multicluster-operators-subscription-rhel9:17847401432026-07-29redhat
redhatmulticluster-engine/cluster-image-set-controller-rhel9:17846467862026-07-29redhat
redhatrhacm2/multicluster-operators-subscription-rhel9:17842295082026-07-28redhat
redhatmulticluster-engine/cluster-image-set-controller-rhel9:17846460262026-07-28redhat
redhatgrafana-0:9.2.10-32.el8_102026-07-27redhat

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 4 ecosystems)
Debian:14(2)
PackageVulnerable rangeFix by version rangeDependents
golang-github-go-git-go-billy5.5.0-1, 5.5.0-2, 5.8.0-1
  • every version up to 5.9.0-1: fixed in 5.9.0-1
—
golang-github-go-git-go-billy-v66~git20260226.45bd095-1, 6~git20260226.45bd095-2
  • every version up to 6.0.0~alpha.1-1: fixed in 6.0.0~alpha.1-1
—
Go(2)
PackageVulnerable rangeFix by version rangeDependents
github.com/go-git/go-billy/v5—
  • every version up to 5.9.0: fixed in 5.9.0
—
github.com/go-git/go-billy/v6—
  • every version up to 6.0.0-alpha.1: fixed in 6.0.0-alpha.1
—
Debian:12(1)
PackageVulnerable rangeFix by version rangeDependents
golang-github-go-git-go-billy5.3.1-3 ... 5.9.1-1 (6 versions)
  • every version on: no fix on record
—
Debian:13(1)
PackageVulnerable rangeFix by version rangeDependents
golang-github-go-git-go-billy5.5.0-1, 5.5.0-2, 5.8.0-1, 5.9.0-1, 5.9.1-1
  • every version on: no fix on record
—

Weakness Classification(2)

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

Additional Vendor Advisories

(17)

Data Freshness Timeline

(refreshed 8× in last 7d / 38× 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 209 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 109 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

  1. 2026-10-29 16:33 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  2. 2026-10-28 16:32 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  3. 2026-10-27 16:32 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  4. 2026-10-26 16:31 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  5. 2026-10-25 16:33 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  6. 2026-10-25 14:27 UTCEG score recompute
  7. 2026-10-24 16:33 UTCEPSS rescoreEPSS 0.4% · 31st percentile
  8. 2026-10-23 16:31 UTCEPSS rescoreEPSS 0.4% · 31st percentile
  9. 2026-10-22 23:42 UTCEG score recompute
  10. 2026-10-22 23:42 UTCVendor advisory
  11. 2026-10-22 16:34 UTCEPSS rescoreEPSS 0.4% · 31st percentile
  12. 2026-10-21 16:33 UTCEPSS rescoreEPSS 0.4% · 31st percentile
  13. 2026-10-20 16:33 UTCEPSS rescoreEPSS 0.4% · 31st percentile
  14. 2026-10-19 16:32 UTCEPSS rescoreEPSS 0.4% · 31st percentile
  15. 2026-10-18 16:32 UTCEPSS rescoreEPSS 0.4% · 31st percentile
  16. 2026-10-18 03:39 UTCEG score recompute
  17. 2026-10-17 16:34 UTCEPSS rescoreEPSS 0.4% · 31st percentile
  18. 2026-10-16 16:42 UTCEPSS rescoreEPSS 0.4% · 31st percentile
  19. 2026-10-15 16:32 UTCEPSS rescoreEPSS 0.4% · 31st percentile
  20. 2026-10-14 16:33 UTCEPSS rescoreEPSS 0.4% · 31st percentile
  21. 2026-10-13 16:34 UTCEPSS rescoreEPSS 0.5% · 43rd percentile
  22. 2026-10-12 16:34 UTCEPSS rescoreEPSS 0.5% · 43rd percentile
  23. 2026-10-12 16:05 UTCEG score recompute
  24. 2026-10-11 19:47 UTCEG score recompute
  25. 2026-10-11 17:01 UTCEG score recompute
Show 75 more
  1. 2026-10-11 14:27 UTCEG score recompute
  2. 2026-10-11 13:48 UTCEPSS rescoreEPSS 0.5% · 43rd percentile
  3. 2026-10-10 20:00 UTCEPSS rescoreEPSS 0.5% · 43rd percentile
  4. 2026-10-09 20:07 UTCEPSS rescoreEPSS 0.5% · 43rd percentile
  5. 2026-10-08 17:12 UTCEPSS rescoreEPSS 0.5% · 43rd percentile
  6. 2026-10-07 23:48 UTCEPSS rescoreEPSS 0.5% · 43rd percentile
  7. 2026-10-06 15:18 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
  8. 2026-10-05 17:43 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
  9. 2026-10-04 23:22 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
  10. 2026-10-03 14:25 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
  11. 2026-10-03 13:39 UTCOSV refresh
  12. 2026-10-01 19:50 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
  13. 2026-09-30 15:03 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
  14. 2026-09-27 13:48 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
  15. 2026-09-26 15:58 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
  16. 2026-09-23 17:53 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  17. 2026-09-20 20:15 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  18. 2026-09-18 19:28 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  19. 2026-09-17 19:31 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  20. 2026-09-16 14:08 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  21. 2026-09-16 05:15 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  22. 2026-09-14 06:09 UTCEG score recompute
  23. 2026-09-14 06:09 UTCVendor advisory
  24. 2026-09-13 16:47 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  25. 2026-09-13 00:36 UTCOSV refresh
  26. 2026-09-12 15:01 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  27. 2026-09-11 14:53 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  28. 2026-09-11 09:37 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  29. 2026-09-10 09:34 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  30. 2026-09-08 22:00 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  31. 2026-09-07 16:01 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  32. 2026-09-06 13:47 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  33. 2026-09-04 05:06 UTCEPSS rescoreEPSS 0.4% · 31st percentile
  34. 2026-09-02 14:12 UTCEPSS rescoreEPSS 0.4% · 31st percentile
  35. 2026-09-01 13:54 UTCEPSS rescoreEPSS 0.4% · 31st percentile
  36. 2026-08-30 19:17 UTCEPSS rescoreEPSS 0.4% · 31st percentile
  37. 2026-08-30 01:22 UTCEPSS rescoreEPSS 0.4% · 31st percentile
  38. 2026-08-28 21:41 UTCEPSS rescoreEPSS 0.4% · 31st percentile
  39. 2026-08-27 14:25 UTCEPSS rescoreEPSS 0.4% · 31st percentile
  40. 2026-08-26 14:46 UTCEPSS rescoreEPSS 0.4% · 31st percentile
  41. 2026-08-25 13:49 UTCEPSS rescoreEPSS 0.4% · 31st percentile
  42. 2026-08-25 03:56 UTCEG score recompute
  43. 2026-08-25 03:56 UTCVendor advisory
  44. 2026-08-23 13:55 UTCEG score recompute
  45. 2026-08-23 13:55 UTCVendor advisory
  46. 2026-08-23 00:19 UTCEPSS rescoreEPSS 0.3% · 22nd percentile
  47. 2026-08-21 23:49 UTCEPSS rescoreEPSS 0.3% · 22nd percentile
  48. 2026-08-21 14:52 UTCEG score recompute
  49. 2026-08-21 14:52 UTCVendor advisory
  50. 2026-08-20 22:55 UTCEPSS rescoreEPSS 0.3% · 22nd percentile
  51. 2026-08-20 10:18 UTCEG score recompute
  52. 2026-08-20 10:18 UTCVendor advisory
  53. 2026-08-19 17:04 UTCEPSS rescoreEPSS 0.3% · 22nd percentile
  54. 2026-08-18 13:48 UTCEPSS rescoreEPSS 0.3% · 22nd percentile
  55. 2026-08-17 13:47 UTCEPSS rescoreEPSS 0.3% · 22nd percentile
  56. 2026-08-17 04:58 UTCEG score recompute
  57. 2026-08-17 04:58 UTCVendor advisory
  58. 2026-08-16 14:56 UTCEPSS rescoreEPSS 0.3% · 22nd percentile
  59. 2026-08-16 02:22 UTCEG score recompute
  60. 2026-08-16 02:22 UTCVendor advisory
  61. 2026-08-16 02:14 UTCEPSS rescoreEPSS 0.3% · 22nd percentile
  62. 2026-08-15 02:03 UTCEG score recompute
  63. 2026-08-15 02:03 UTCVendor advisory
  64. 2026-08-15 01:30 UTCEPSS rescoreEPSS 0.3% · 21st percentile
  65. 2026-08-14 04:21 UTCEG score recompute
  66. 2026-08-14 04:21 UTCVendor advisory
  67. 2026-08-13 22:00 UTCEPSS rescoreEPSS 0.3% · 21st percentile
  68. 2026-08-13 06:39 UTCEG score recompute
  69. 2026-08-13 06:39 UTCVendor advisory
  70. 2026-08-12 13:51 UTCEPSS rescoreEPSS 0.3% · 21st percentile
  71. 2026-08-12 08:56 UTCEG score recompute
  72. 2026-08-12 08:56 UTCVendor advisory
  73. 2026-08-11 07:14 UTCEG score recompute
  74. 2026-08-11 07:14 UTCVendor advisory
  75. 2026-08-11 00:00 UTCEPSS rescoreEPSS 0.3% · 21st percentile

Frequently asked(5)

What is CVE-2026-44740?
CVE-2026-44740 is a medium-severity vulnerability; its CVE record was published on June 1, 2026. Billy is an interface filesystem abstraction for Go. Prior to versions 5.9.0 and 6.0.0-alpha.1, multiple components may improperly handle crafted or malformed input, resulting in panics, infinite loops, uncontrolled recursion, or excessive resource consumption. These issues arise from insufficient…
When was the CVE record for CVE-2026-44740 published?
The CVE record for CVE-2026-44740 was published on June 1, 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 July 22, 2026; the record at its source may have been updated since.
Is CVE-2026-44740 actively exploited?
CVE-2026-44740 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.4% probability of exploitation in the next 30 days (32nd percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-44740?
CVE-2026-44740 has a CVSS v3 base score of 6.5 (NVD).
How do I remediate CVE-2026-44740?
A fix for CVE-2026-44740 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-44740 are linked in the Vendor Advisories panel on this page.

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