8.1

CVE-2026-44973: Billy: Path traversal vulnerabilities

Deferred
AliasesUBUNTU-CVE-2026-44973DEBIAN-CVE-2026-44973CGA-2cm4-fmp4-2p85
Published 28-05-2026Last modified 01-06-2026

Vulnerability summary

CVE-2026-44973 is a high (CVSS 8.1) vulnerability in go-git go-billy. EPSS estimates a 0.31% chance of exploitation in the next 30 days, higher than 23.9% of scored vulnerabilities.

Priority
Routine

Not severe (CVSS 8.1, network access); no exploitation reported by the 5 checked sources

Source freshness unavailable

How is this decided?
CVSS score
8.1/10
010
High · v3.1 (CVE.org)
EPSS score
0.31%
0%100%
Low · -0.16 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 3 · Related 4
OPENSUSE-SU-2026:21551-1SUSE-SU-2026:23216-1SUSE-SU-2026:23227-1CGA-W99C-3VGH-QRG5

Timeline

  1. 28-05-2026
    PublishedVulnerability first disclosed.
  2. 01-06-2026
    Last modifiedVulnerability information updated.

Description

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 metrics

7 scores · 7 sources · 1 version

EPSS trend

Probability

0.31%

Chance of exploitation in the next 30 days

Percentile

24%

Versus all other CVEs

30-day change

Decrease -0.16 pp

From 0.47% 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.

Chainguard108 products
  • amazon-ssm-agent< 3.3.4364.0-r1
  • amazon-ssm-agent-ecs-exec< 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
Wolfi29 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)
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
Go-git1 product
Ubuntu1 product
  • golang-github-go-git-go-billyAll versions (No fix recorded)

6 vendors · 143 products

References

10 links