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VulnerabilityPublished

CVE-2026-44740: go-git go-billy · Uncontrolled Recursion

Affects go-git go-billySource CVE Database V5

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Not known to be exploited · CVSS 6.5 Medium : upgrade to 6.0.0-alpha.1 or 5.9.0 when convenient.

Data as of 30 Oct 2026, 11:52 UTC

CVSS 3.1 base score
6.5Medium
How severe the flaw is on the 0–10 CVSS scale.
EPSS
0.3% chance of exploitation in 30 days – higher than 32% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Patch
Available – fixed in 6.0.0-alpha.1, 5.9.0
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 1 Jun 2026

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponized: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq Mirage: no evidence on record.

    No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 30 Oct 2026.

What to do

Upgrade go-billy to 6.0.0-alpha.1 or 5.9.0; github.com/go-git/go-billy to 5.9.0.

Affected software

ProductAffectedFixed in
go-gitgo-billyAffected
  • <6.0.0-alpha.1
Fixed in
  • 6.0.0-alpha.1
go-gitgo-billyAffected
  • <5.9.0
Fixed in
  • 5.9.0
Gogithub.com/go-git/go-billypkg:golang/github.com/go-git/go-billyOther threatsAffected
  • <5.9.0
  • =6.0.0-alpha.1
Fixed in
  • 5.9.0

Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.

AI-suggested

A fix is available in go-billy versions 5.9.0 and 6.0.0-alpha.1. Users should upgrade to these versions or later to remediate the vulnerability. No vendor advisory is provided to indicate alternative mitigations or temporary fixes. Patch status is not explicitly confirmed beyond the stated fixed versions; users should verify with the official go-git/go-billy project resources for the latest remediation guidance.

Description

The go-billy filesystem abstraction for Go prior to version 5.9.0 and including 6.0.0-alpha.1 contains vulnerabilities related to uncontrolled recursion and improper handling of malformed input. These issues can cause panics, infinite loops, or excessive resource consumption due to missing safety mechanisms like cycle detection and recursion limits. The vulnerability has been addressed in versions 5.9.0 and 6.0.0-alpha.1.

References

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