CVE-2026-44973

HIGHNVD 8.18.1—
EchelonGraph scoreMEDIUM confidence

This high-severity CVE scores 8.1 under NVD CVSS v3. EPSS exploit probability: 0.3%, top 76% of all CVEs by exploit prediction. GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).

Triggered by: NVD CVSS baseline
Sources: epss, nvd
Trending — 3 sources updated this week
8.1EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 8.1Exploit: None knownExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

Billy is an interface filesystem abstraction for Go. Prior to 5.9.0, multiple path traversal issues exist across different components of go-billy. Insufficient path sanitization and boundary enforcement may allow crafted paths (e.g., using ..) to escape intended base directories. While go-billy was not originally designed to provide a strong security boundary, some of these issues were inconsistent across some of the built-in implementations. This results in scenarios where applications relying on go-billy for some level of isolation may inadvertently expose access to unintended filesystem locations. This vulnerability is fixed in 5.9.0.

CVSS v3
8.1
EG Score
8.1(medium)
EG Risk
37(Track)
EG Risk 37/100SSVC: 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
Severity81% × 45%
Exploitation0% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
24%
KEV
Not listed

Published

May 28, 2026

Last Modified

July 21, 2026

Advisory Details (1)

Auto-updated May 28, 2026
Patch available. Sources: github.
github Patch Available

Path traversal vulnerabilities · Advisory · go-git/go-billy · GitHub

https://github.com/go-git/go-billy/security/advisories/GHSA-qw64-3x98-g7q2

Vendor Advisories for CVE-2026-44973(1)

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

Affected Packages

(6 across 4 ecosystems)
Debian:14(2)
PackageVulnerable rangeFixed inDependents
golang-github-go-git-go-billy5.5.0-1, 5.5.0-2, 5.8.0-15.9.0-1—
golang-github-go-git-go-billy-v66~git20260226.45bd095-1, 6~git20260226.45bd095-26.0.0~alpha.1-1—
Go(2)
PackageVulnerable rangeFixed inDependents
github.com/go-git/go-billy/v5—5.9.0—
github.com/go-git/go-billy/v6—6.0.0-alpha.1—
Debian:12(1)
PackageVulnerable rangeFixed inDependents
golang-github-go-git-go-billy5.3.1-3 ... 5.9.1-1 (6 versions)——
Debian:13(1)
PackageVulnerable rangeFixed inDependents
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——

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 8× in last 7d / 29× 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.

Showing the most recent 100 of 136 total refreshes for this CVE.

  1. 2026-09-16 05:15 UTCEPSS rescore
  2. 2026-09-14 06:36 UTCEG score recompute
  3. 2026-09-13 16:47 UTCEPSS rescore
  4. 2026-09-13 02:09 UTCOSV refresh
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  20. 2026-08-25 04:34 UTCEG score recompute
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  24. 2026-08-21 15:19 UTCEG score recompute
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  1. 2026-08-20 10:40 UTCEG score recompute
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  5. 2026-08-16 15:08 UTCEG score recompute
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  10. 2026-08-14 00:47 UTCEG score recompute
  11. 2026-08-13 22:00 UTCEPSS rescore
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  23. 2026-08-05 19:17 UTCEPSS rescore
  24. 2026-08-04 23:33 UTCEG score recompute
  25. 2026-08-04 15:10 UTCEPSS rescore
  26. 2026-08-04 10:38 UTCEPSS rescore
  27. 2026-08-03 16:05 UTCEG score recompute
  28. 2026-08-03 10:36 UTCEPSS rescore
  29. 2026-08-02 14:23 UTCEG score recompute
  30. 2026-08-02 02:27 UTCEPSS rescore
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  39. 2026-07-27 09:31 UTCEG score recompute
  40. 2026-07-26 14:54 UTCEPSS rescore
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  45. 2026-07-23 03:15 UTCEG score recompute
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  48. 2026-07-20 17:08 UTCEPSS rescore
  49. 2026-07-19 02:29 UTCEPSS rescore
  50. 2026-07-18 10:04 UTCEPSS rescore
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  74. 2026-06-23 21:33 UTCEPSS rescore
  75. 2026-06-22 14:25 UTCEPSS rescore

Frequently asked(5)

What is CVE-2026-44973?
CVE-2026-44973 is a high vulnerability published on May 28, 2026. Billy is an interface filesystem abstraction for Go. Prior to 5.9.0, multiple path traversal issues exist across different components of go-billy. Insufficient path sanitization and boundary enforcement may allow crafted paths (e.g., using ..) to escape intended base directories. While go-billy was…
When was CVE-2026-44973 disclosed?
CVE-2026-44973 was first published in the National Vulnerability Database on May 28, 2026, with the most recent update on July 21, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-44973 actively exploited?
CVE-2026-44973 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0% probability of exploitation in the next 30 days, which ranks it in the top 76.2% of all scored CVEs.
What is the CVSS score of CVE-2026-44973?
CVE-2026-44973 has a CVSS v3 base score of 8.1 (NVD).
How do I remediate CVE-2026-44973?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-44973, 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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