apko allows users to build and publish OCI container images built from apk packages. From version 0.14.8 to before 1.1.1, an attacker who controls or compromises an APK repository used by apko could cause resource exhaustion on the build host. The ExpandApk function in pkg/apk/expandapk/expandapk.go expands .apk streams without enforcing decompression limits, allowing a malicious repository to serve a small, highly-compressed .apk that inflates into a large tar stream, consuming excessive disk space and CPU time, causing build failures or denial of service. This issue has been patched in version 1.1.1.
CVE-2026-25140
This high-severity CVE scores 7.5 under NVD CVSS v3. EPSS exploit probability: 0.4%, top 70% of all CVEs by exploit prediction. GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).
- High severity, but no confirmed exploitation yet
No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.
- CVSS v3
- 7.5
- EG Score
- 7.5(medium)
- EG Risk
- 49(Track)EG Risk 49/100SSVC: Track
EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).
How it’s computedSeverity75% × 45%Exploitation0% × 40%Automatability100% × 15%Action: Routine — remediate on your standard cadence. - EPSS PROB
- 0%
- EPSS %ILE
- 32%
- KEV
- Not listed
Published
February 4, 2026
Last Modified
June 17, 2026
Advisory Details (2)
Auto-updated Aug 6, 2026potential unbounded resource consumption in expandapk.ExpandApk on attacker-controlled .apk streams · Advisory · chainguard-dev/apko · GitHub
https://github.com/chainguard-dev/apko/security/advisories/GHSA-f4w5-5xv9-85f6commit 2be3903fe194 (chainguard-dev/apko)
Fix landed in chainguard-dev/apko commit 2be3903fe194 — awaiting tagged release
https://github.com/chainguard-dev/apko/commit/2be3903fe194ad46351840f0569b35f5ac965f09Affected Packages
(1 across 1 ecosystem)
Go(1)
| Package | Vulnerable range | Fixed in | Dependents |
|---|---|---|---|
| chainguard.dev/apko | — | 1.1.1 | — |
Weakness Classification(2)
MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.
Data Freshness Timeline
(refreshed 5× in last 7d / 25× in last 30d)
Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.
Showing the most recent 100 of 157 total refreshes for this CVE.
- 2026-09-19 19:30 UTCOSV refresh
- 2026-09-18 19:27 UTCEPSS rescore
- 2026-09-16 14:07 UTCEPSS rescore
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- 2026-08-31 22:34 UTCOSV refresh
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- 2026-08-20 22:55 UTCEPSS rescore
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- 2026-08-14 11:12 UTCEG score recompute
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- 2026-08-12 13:50 UTCEPSS rescore
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- 2026-08-09 15:51 UTCEG score recompute
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- 2026-08-07 22:46 UTCEG score recompute
- 2026-08-06 13:46 UTCEPSS rescore
- 2026-08-06 04:22 UTCEG score recompute
- 2026-08-05 19:17 UTCEPSS rescore
- 2026-08-04 15:10 UTCEPSS rescore
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- 2026-08-02 21:25 UTCEG score recompute
- 2026-08-02 02:26 UTCEPSS rescore
- 2026-08-01 04:16 UTCEPSS rescore
- 2026-07-30 22:51 UTCOSV refresh
- 2026-07-30 16:27 UTCEPSS rescore
- 2026-07-30 01:30 UTCEPSS rescore
- 2026-07-27 14:13 UTCEPSS rescore
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- 2026-07-23 14:18 UTCEPSS rescore
- 2026-07-23 14:18 UTCEPSS rescore
- 2026-07-23 03:07 UTCEG score recompute
- 2026-07-22 14:08 UTCEPSS rescore
- 2026-07-21 15:24 UTCEPSS rescore
- 2026-07-21 15:24 UTCEPSS rescore
- 2026-07-20 17:08 UTCEPSS rescore
- 2026-07-19 14:31 UTCEPSS rescore
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- 2026-07-19 02:29 UTCEPSS rescore
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- 2026-07-16 17:03 UTCEPSS rescore
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- 2026-07-15 02:00 UTCEPSS rescore
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- 2026-07-13 22:30 UTCEPSS rescore
- 2026-07-13 08:07 UTCOSV refresh
- 2026-07-13 06:13 UTCEPSS rescore
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- 2026-07-12 05:46 UTCEPSS rescore
- 2026-07-12 05:46 UTCEPSS rescore
- 2026-07-11 08:27 UTCEPSS rescore
- 2026-07-09 19:10 UTCEPSS rescore
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- 2026-06-30 23:22 UTCEPSS rescore
- 2026-06-30 23:22 UTCEPSS rescore
Frequently asked(5)
What is CVE-2026-25140?
When was CVE-2026-25140 disclosed?
Is CVE-2026-25140 actively exploited?
What is the CVSS score of CVE-2026-25140?
How do I remediate CVE-2026-25140?
Dependency Blast Radius
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