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CVE-2026-25140

24
FAUCET Score

CVE-2026-25140 is a high-severity resource exhaustion vulnerability affecting Chainguard apko versions 0.14.8 through 1.1.0. An attacker controlling or compromising an APK repository could serve a small, highly compressed .apk file that expands into a massive tar stream, consuming excessive disk space and CPU time on the build host. This unauthenticated attack (CVSS 7.5) can lead to denial of service or build failures. While there is no known active exploitation, public exploit code, or KEV entry, the vulnerability has garnered some community discussion and media coverage, indicating awareness.

Impacted Technologies

VendorProductVersion(s)CPE
>= 0.14.8, < 1.1.1CPE matchmatch criteria
cpe:2.3:a:chainguard:apko:*:*:*:*:*:go:*:*

CVSS Data

CVSS version used by this source: 3.1

7.5HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
3.6
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.37%
Probability of exploitation in next 30 days
EPSS Percentile
29.2%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0037 is in the 10th percentile among its peer group of 51,506 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.4 GitHub mentions.

Media Mentions

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (3)

github_advisorypatch availablevia nvd_reference
View patch
gopatch availablevia ghsa
Product: chainguard-dev/apkoFixed in: 1.1.0
gopatch availablevia ghsa
Product: chainguard.dev/apkoFixed in: 1.1.1

Vendor Advisories (1)

goGHSA-f4w5-5xv9-85f6high

apko affected by potential unbounded resource consumption in expandapk.ExpandApk on attacker-controlled .apk streams

Feb 4, 2026

References

github.com / chainguard-dev/apko/commit/2be3903fe194ad46351840f0569b35f5ac965f09
Patch
github.com / chainguard-dev/apko/security/advisories/GHSA-f4w5-5xv9-85f6
Third Party Advisory