6.5

CVE-2023-26054: Credentials inlined to Git URLs could end up in provenance attestation in BuildKit

Modified
AliasesUBUNTU-CVE-2023-26054GHSA-gc89-7gcr-jxqcALPINE-CVE-2023-26054
Published 06-03-2023Last modified 25-02-2025

Vulnerability summary

CVE-2023-26054 is a medium (CVSS 6.5) vulnerability in moby buildkit. EPSS estimates a 1.03% chance of exploitation in the next 30 days, higher than 63.7% of scored vulnerabilities. 1 public exploit is recorded.

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
1.03%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedNot listed by any tracked catalog.
RansomwareNot flaggedNo ransomware use recorded.
Public exploits1github

Advisory lineage

Upstream 0 · Downstream 1
MGASA-2023-0329

Timeline

  1. 06-03-2023
    PublishedVulnerability first disclosed.
  2. 25-02-2025
    Last modifiedVulnerability information updated.

Description

BuildKit is a toolkit for converting source code to build artifacts in an efficient, expressive and repeatable manner. In affected versions when the user sends a build request that contains a Git URL that contains credentials and the build creates a provenance attestation describing that build, these credentials could be visible from the provenance attestation. Git URL can be passed in two ways: 1) Invoking build directly from a URL with credentials. 2) If the client sends additional version control system (VCS) info hint parameters on builds from a local source. Usually, that would mean reading the origin URL from `.git/config` file. When a build is performed under specific conditions where credentials were passed to BuildKit they may be visible to everyone who has access to provenance attestation. Provenance attestations and VCS info hints were added in version v0.11.0. Previous versions are not vulnerable. In v0.10, when building directly from Git URL, the same URL could be visible in `BuildInfo` structure that is a predecessor of Provenance attestations. Previous versions are not vulnerable. This bug has been fixed in v0.11.4. Users are advised to upgrade. Users unable to upgrade may disable VCS info hints by setting `BUILDX_GIT_INFO=0`. `buildctl` does not set VCS hints based on `.git` directory, and values would need to be passed manually with `--opt`.

CVSS metrics

5 scores · 5 sources · 1 version

EPSS trend

Probability

1.03%

Chance of exploitation in the next 30 days

Percentile

64%

Versus all other CVEs

30-day change

No change 0.00 pp

From 1.03% on 05-10-2026

05-10-202604-11-2026

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

1 found
  • githubUnverified

    Buildkit

    Maturity: poc

Weaknesses

CWE · root cause

Affected systems

Version check

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

Alpine1 product
  • docker< 23.0.2-r0
Github.com/moby1 product
  • buildkit≥ 0.10.0, < 0.11.4
Moby1 product
Mobyproject1 product
Ubuntu1 product
  • docker.io-app< 24.0.5-0ubuntu1~20.04.1 | < 24.0.5-0ubuntu1~22.04.1

5 vendors · 5 products

References

14 links
Show all 14 references