6.5

CVE-2026-44740: go-billy: Lack of depth and cycle detection in symlink resolution may lead to infinite loops and resource exhaustion

Deferred
AliasesRHSA-2026:46391UBUNTU-CVE-2026-44740DEBIAN-CVE-2026-44740
Published 01-06-2026Last modified 01-06-2026

Vulnerability summary

CVE-2026-44740 is a medium (CVSS 6.5) Uncontrolled Recursion vulnerability in go-git go-billy. EPSS estimates a 0.39% chance of exploitation in the next 30 days, higher than 33% of scored vulnerabilities.

Priority
Routine

Not severe (CVSS 6.5, network access); no exploitation reported by the 5 checked sources

Source freshness unavailable

How is this decided?
CVSS score
6.5/10
010
Medium · v3.1 (CVE.org)
EPSS score
0.39%
0%100%
Low · -0.14 pp in 30 days
KEVNot listedNot listed by any tracked catalog.
RansomwareNot flaggedNo ransomware use recorded.
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 24 · Related 20
OPENSUSE-SU-2026:10856-1OPENSUSE-SU-2026:10941-1OPENSUSE-SU-2026:10967-1OPENSUSE-SU-2026:11053-1OPENSUSE-SU-2026:20956-1OPENSUSE-SU-2026:21072-1

Timeline

  1. 01-06-2026
    PublishedVulnerability first disclosed.
  2. 01-06-2026
    Last modifiedVulnerability information updated.

Description

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 metrics

8 scores · 8 sources · 1 version

EPSS trend

Probability

0.39%

Chance of exploitation in the next 30 days

Percentile

33%

Versus all other CVEs

30-day change

Decrease -0.14 pp

From 0.53% on 04-10-2026

04-10-202603-11-2026

Known exploited

Compare KEV catalogs
CISA KEV

Not in the CISA KEV catalog.

ENISA CNW

Not in the ENISA CNW catalog.

CIRCL

Not in the CIRCL catalog.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Version check

Known conditions: network-reachable, low-privilege account, no user interaction (CVSS vector). Other conditions: not stated in public data.

Chainguard113 products
  • amazon-ssm-agent< 3.3.4364.0-r1
  • amazon-ssm-agent-ecs-exec< 3.3.4364.0-r0 | < 3.3.4364.0-r1
  • argo-cd-3.0All versions (No fix recorded)
  • argo-cd-3.0-compatAll versions (No fix recorded)
  • argo-cd-3.1< 3.1.16-r3
Wolfi31 products
  • argo-cd-3.2< 3.2.12-r1
  • argo-cd-3.2-compat< 3.2.12-r1
  • cerbos< 0.53.0-r3
  • cerbosctl< 0.53.0-r3
  • external-secrets-operator-1.1All versions (No fix recorded)
Redhat4 products
  • grafana< 0:9.2.10-32.el8_10
  • grafana-debuginfo< 0:9.2.10-32.el8_10
  • grafana-debugsource< 0:9.2.10-32.el8_10
  • grafana-selinux< 0:9.2.10-32.el8_10
Debian2 products
  • golang-github-go-git-go-billyAll versions (No fix recorded) | < 5.9.0-1
  • golang-github-go-git-go-billy-v6< 6.0.0~alpha.1-1
Github.com/go-git/go-billy2 products
  • v5< 5.9.0
  • v6< 6.0.0-alpha.1
Opensuse2 products
  • amazon-ssm-agent&distro=openSUSE Tumbleweed< 3.3.4624.0-1.1
  • git-bug&distro=openSUSE Tumbleweed< 0.10.1-6.1
Ubuntu2 products
  • golang-github-go-git-go-billyAll versions (No fix recorded)
  • golang-github-go-git-go-billy-v6All versions (No fix recorded)
Go-git1 product

8 vendors · 157 products

References

17 links
Show all 17 references