7.5

CVE-2026-15791: moby buildkit Path Traversal

CVSS: 7.5v3.1HighAnalyzed
AliasesUBUNTU-CVE-2026-15791
Published 21-07-2026Last modified 21-07-2026
Open JSON

Vulnerability summary

CVE-2026-15791 is a high (CVSS 7.5) Path Traversal vulnerability in moby buildkit. EPSS estimates a 0.25% chance of exploitation in the next 30 days, higher than 15.2% of scored vulnerabilities.

Overall risk
30/100
0100
Medium · default modelHow is this calculated?
CVSS score
7.5/10
010
High · v3.1 (NVD)
EPSS score
0.25%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Timeline

  1. 21-07-2026
    PublishedVulnerability first disclosed.
  2. 21-07-2026
    Last modifiedVulnerability information updated.

Description

A crafted message in the BuildKit low-level build API can be used to remove the contents of the /tmp directory. The action that can normally be used to delete files inside the build container rootfs can escape into the real host temp directory.

CVSS metrics

5 scores · 3 sources · 2 versions

EPSS trend

Probability

0.25%

Chance of exploitation in the next 30 days

Percentile

15%

Versus all other CVEs

30-day change

0.00 pp

From 0.25% on 21-09-2026

21-09-202621-10-2026
EPSS score
0.25%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Ubuntu2 products
  • docker.ioAll versions (No fix recorded)
  • docker.io-appAll versions (No fix recorded)
Moby1 product
Mobyproject1 product

3 vendors · 4 products

References

3 links