apko allows users to build and publish OCI container images built from apk packages. From version 0.14.8 to before 1.1.0, expandapk.Split drains the first gzip stream of an APK archive via io.Copy(io.Discard, gzi) without explicit bounds. With an attacker-controlled input stream, this can force large gzip inflation work and lead to resource exhaustion (availability impact). The Split function reads the first tar header, then drains the remainder of the gzip stream by reading from the gzip reader directly without any maximum uncompressed byte limit or inflate-ratio cap. A caller that parses attacker-controlled APK streams may be forced to spend excessive CPU time inflating gzip data, leading to timeouts or process slowdown. This issue has been patched in version 1.1.0.
CVE-2026-25122
“—” beside the score: it is equal to NVD's CVSS score.
Score 5.5 from GitHub Security Advisory (severity: MODERATE) published 2026-02-03. NVD baseline CVSS 5.5; sources differ by 0.0.
Also known asEUVD-2026-5379 (ENISA EUVD) · GHSA-6p9p-q6wh-9j89 (GitHub Security Advisories) · GO-2026-4406 (OSV.dev)Source: ENISA EUVD
- Lower severity and no public exploit yet
A fix is available — apply it.
- CVSS v3
- 5.5
- EG Score
- 5.5MEDIUMmedium confidence
- EG Risk
- 25EG Risk 25/100
EG Risk is EchelonGraph's 0–100 priority score. It fuses impact severity (EG Severity, the CVSS base score, never the KEV-floored or EPSS-lifted EG Score) with real-world exploitation and automatability, under weights EchelonGraph set by hand, so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner.
How it’s computed (value × EchelonGraph’s weight)Severity55% × 45%Impact severity (EG Severity): CVSS 5.5 of 10. Never the KEV-floored or EPSS-lifted EG Score.Exploitation0.1% × 40%FIRST EPSS: the 30-day exploitation probability when EchelonGraph scored this CVE.Automatability0% × 15%CISA's SSVC Automatable value: no (Vulnrichment).SSVC (CISA's decision table, applied by EchelonGraph): Track at every mission impact level.Exploitation none (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE.Action: A fix is available. Apply it within your standard update timelines. - EPSS PROB
- 0.1%
- EPSS %ILE
- 2nd
- KEV
- Not listed
What the EG score is made of (scorer v4.0: the three questions the 0–10 score mixes, published apart · methodology)
The EG score (5.5): severity, escalated by confirmed exploitation. This CVE's 5.5 is its impact severity (EG Severity), not escalated.
- EG Severity
- 5.5 MEDIUMCVSS-B, impact only: no KEV listing, EPSS or EG-KEV tier raises it.GitHub Security Advisory CVSS
- EG Likelihood
- 0.1% within 30 daysSource: FIRST EPSS (model v2026.06.15, score date 2026-10-31). FIRST's exploitation probability, not an EchelonGraph model.
- Confirmed exploitation
- None on record (CISA KEV, EG-KEV Tier 1)Reported apart from the likelihood: an observed fact, not a probability.
- EG Priority
- SSVC Track at medium mission impactTrack at every mission impact level.CISA BOD 26-04: 60 days if the affected system is publicly exposed; Fix on system upgrade if it is not.Each input and its source, and whom BOD 26-04 binds: the SSVC and BOD 26-04 blocks below.
SSVC (CISA's decision table, applied by EchelonGraph)Track at every mission impact level.
A fix is available. Apply it within your standard update timelines.
Exploitation none (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE. Mission impact is CISA's Mission & Well-being decision point, and only you can judge it. CISA's table makes it high when Mission Prevalence is Essential — the vulnerable component "directly provides capabilities that constitute at least one MEF for at least one entity" (MEF: mission essential function) — or when Public Well-Being Impact is Irreversible: "multiple fatalities are likely", the cyber-physical system "is likely lost or destroyed", "extreme or serious externalities" are imposed on other parties, or social systems such as elections or the financial grid "are destabilized and potentially collapse". CISA's decision table
BOD 26-04 (CISA's remediation timeline, Table 1)60 days if the affected system is publicly exposed; Fix on system upgrade if it is not.
The score's inputs: In CISA KEV no (CISA's KEV catalog) · Automatable no (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). Whether your system is publicly exposed is yours to answer. BOD 26-04 binds US Federal Civilian Executive Branch agencies; for anyone else it is CISA's published timeline, a reference rather than an obligation. The directive · how EchelonGraph applies it
Published
February 4, 2026
Last Modified
June 17, 2026
Advisory Details (2)
Auto-updated Aug 9, 2026unbounded resource consumption in expandapk.Split on attacker-controlled .apk streams · Advisory · chainguard-dev/apko · GitHub
https://github.com/chainguard-dev/apko/security/advisories/GHSA-6p9p-q6wh-9j89commit 2be3903fe194 (chainguard-dev/apko)
Fix landed in chainguard-dev/apko commit 2be3903fe194 — awaiting tagged release
https://github.com/chainguard-dev/apko/commit/2be3903fe194ad46351840f0569b35f5ac965f09Patch Availability(1)
| Vendor / Ecosystem | Fix (by version range) / Patch | Released | Source |
|---|---|---|---|
| go | chainguard.dev/apko @ 1.1.0 (fixes >= 0.14.8, < 1.1.0) | — | ghsa |
Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.
Affected Packages
(1 across 1 ecosystem)
Go(1)
| Package | Vulnerable range | Fix by version range | Dependents |
|---|---|---|---|
| chainguard.dev/apko | — |
| — |
Weakness Classification(2)
MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.
Data Freshness Timeline
(refreshed 8× in last 7d / 37× in last 30d)
Each row is a time one of our pipelines fetched, updated or re-scored this CVE. 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. An arrow marks a change the record states ("CVSS v3 → 9.1"); EPSS and GHSA rows show the values recorded at that time, not what changed (EPSS values are rounded; hover one for the exact figures). Most recent first.
Showing the most recent 97 of 176 refreshes on record for this CVE.
A repeat, a row identical to one the same pipeline wrote less than 10 seconds earlier, is not a separate refresh and is not counted. 3 repeat rows among the latest 100 are merged into the row they repeat. The 79 oldest rows on record are not shown and were not checked, so the counts can still include repeats.
- 2026-11-02 16:44 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
- 2026-11-01 16:34 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
- 2026-11-01 07:57 UTCGHSA enrichmentGHSA-6p9p-q6wh-9j89 · GitHub severity MODERATE · GitHub CVSS 5.5
- 2026-11-01 07:57 UTCEG score recompute
- 2026-10-31 16:32 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
- 2026-10-31 01:55 UTCOSV refresh
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- 2026-10-25 14:40 UTCEG score recompute
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- 2026-10-23 04:41 UTCEG score recompute
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- 2026-10-18 03:53 UTCEG score recompute
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- 2026-10-12 16:19 UTCEG score recompute
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- 2026-10-11 14:46 UTCEG score recompute
- 2026-10-10 20:00 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
- 2026-10-09 20:07 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
- 2026-10-08 17:36 UTCOSV refresh
- 2026-10-08 17:11 UTCEPSS rescoreEPSS 0.1% · 1st percentile
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- 2026-09-24 14:03 UTCEPSS rescoreEPSS 0.1% · 1st percentile
- 2026-09-18 23:30 UTCOSV refresh
- 2026-09-18 19:27 UTCEPSS rescoreEPSS 0.1% · 1st percentile
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- 2026-08-31 03:02 UTCOSV refresh
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- 2026-08-14 11:12 UTCEG score recompute
- 2026-08-13 22:00 UTCEPSS rescoreEPSS 0.1% · 1st percentile
- 2026-08-13 03:31 UTCEG score recompute
- 2026-08-12 13:50 UTCEPSS rescoreEPSS 0.1% · 1st percentile
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- 2026-08-09 15:51 UTCEG score recompute
- 2026-08-09 13:46 UTCEPSS rescoreEPSS 0.1% · 1st percentile
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- 2026-08-07 22:46 UTCEG score recompute
- 2026-08-06 13:46 UTCEPSS rescoreEPSS 0.1% · 1st percentile
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- 2026-08-05 19:17 UTCEPSS rescoreEPSS 0.1% · 1st percentile
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- 2026-08-02 21:25 UTCEG score recompute
- 2026-08-01 04:16 UTCEPSS rescoreEPSS 0.1% · 1st percentile
- 2026-07-30 22:50 UTCOSV refresh
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Related CVEs(same product + same CWE)
Same product
8 shownGo:chainguard.dev/apko
Frequently asked(5)
What is CVE-2026-25122?
When was the CVE record for CVE-2026-25122 published?
Is CVE-2026-25122 actively exploited?
What is the CVSS score of CVE-2026-25122?
How do I remediate CVE-2026-25122?
Dependency Blast Radius
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