compose-lint is a Docker Compose security linter that identifies dangerous misconfigurations before deployment. From 0.9.0 until 0.18.0, compose-lint's YAML parser recognizes lone carriage returns and Unicode line separators U+0085, U+2028, and U+2029 as line breaks while fix position conversion counts only newline characters. A pull request can place one of these separators in a quoted value so fix --apply shifts each later edit and deletes the line after the selected target, including an unselected network or other security setting. The resulting Compose file can remain valid, post-edit checks can pass, and the command can report a successful fix even though the dry-run diff was the only place showing the extra deletion. This issue is fixed in version 0.18.0.
CVE-2026-123370
“—” beside the score: it is equal to the CVSS score beside it.
This medium-severity CVE scores 5.1 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.3% (26th percentile of EPSS-scored CVEs). No GitHub Security Advisory CVSS is on record for this CVE.
Also known asEUVD-2026-120127 (ENISA EUVD) · GHSA-65v8-q222-64xx (GitHub Security Advisories)Source: ENISA EUVD
- Lower severity and no public exploit yet
A fix is available — apply it.
- CVSS
- 5.1
- EG Score
- 5.1MEDIUMmedium confidence
- EG Risk
- 23EG Risk 23/100
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)Severity51% × 45%Impact severity (EG Severity): CVSS 5.1 of 10. Never the KEV-floored or EPSS-lifted EG Score.Exploitation0.3% × 40%FIRST EPSS: the 30-day exploitation probability when EchelonGraph scored this CVE.Automatability0% × 15%CISA's BOD 26-04 default: no one has published Automatable for this CVE, and CISA treats it as “no” for a CVE not in KEV.SSVC (CISA's decision table, applied by EchelonGraph): Track at every mission impact level.Exploitation none (no CISA value, KEV listing or exploit code on record) · Automatable no (CISA's BOD 26-04 default) · Technical impact partial (CVSS v4.0 confidentiality and integrity impact neither High). EchelonGraph holds no SSVC assessment of this CVE from CISA: none of these inputs is from 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
- 0.3%
- EPSS %ILE
- 26th
- 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 (5.1): severity, escalated by confirmed exploitation. This CVE's 5.1 is its impact severity (EG Severity), not escalated.
- EG Severity
- 5.1 MEDIUMCVSS-B, impact only: no KEV listing, EPSS or EG-KEV tier raises it.a secondary CVSS source
- EG Likelihood
- 0.3% within 30 daysSource: FIRST EPSS (model v2026.06.15, score date 2026-11-12). 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 (no CISA value, KEV listing or exploit code on record) · Automatable no (CISA's BOD 26-04 default) · Technical impact partial (CVSS v4.0 confidentiality and integrity impact neither High). EchelonGraph holds no SSVC assessment of this CVE from CISA: none of these inputs is from 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's BOD 26-04 default) · Technical impact partial (CVSS v4.0 confidentiality and integrity impact neither High). Where an input reads “CISA's BOD 26-04 default”, no one has published it for this CVE, and CISA's implementation guidance says: “If “Automatable” and “Technical Impact” information items about a CVE ID are not available and the CVE ID is not in the KEV Catalog, CISA will treat its values as “no” and “total,” respectively, until CISA or a third party provides metadata about the CVE ID. CISA will always provide the Vulnrichment data for a CVE ID listed in the KEV Catalog.” 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
November 9, 2026
Last Modified
November 12, 2026
Advisory Details (6)
Auto-updated Nov 9, 2026v0.18.0
Patch available: tmatens/compose-lint v0.18.0
https://github.com/tmatens/compose-lint/releases/tag/v0.18.0commit cbbf886d9134 (tmatens/compose-lint)
Fix landed in tmatens/compose-lint commit cbbf886d9134 — awaiting tagged release
https://github.com/tmatens/compose-lint/commit/cbbf886d91347dea9c51b584eb50088e70007d0dcommit c9d453a6a69c (tmatens/compose-lint)
Fix landed in tmatens/compose-lint commit c9d453a6a69c — awaiting tagged release
https://github.com/tmatens/compose-lint/commit/c9d453a6a69c076788fe1db05cb54684a616d1deRefuse Compose files with an ambiguous line break
Fix merged in tmatens/compose-lint PR #549 on 2026-08-12 — awaiting tagged release
https://github.com/tmatens/compose-lint/pull/549Give compose-lint one authoritative line space
Fix merged in tmatens/compose-lint PR #547 on 2026-08-12 — awaiting tagged release
https://github.com/tmatens/compose-lint/pull/547`fix --apply` can delete a line the user did not select, including a security setting · Advisory · tmatens/compose-lint · GitHub
Affected: 0.18.0. Line splitting and position conversion now share one definition of a line
https://github.com/tmatens/compose-lint/security/advisories/GHSA-65v8-q222-64xxVendor Advisories for CVE-2026-123370(1)
These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.
Patch Availability(1)
| Vendor / Ecosystem | Fix (by version range) / Patch | Released | Source |
|---|---|---|---|
| pip | compose-lint @ 0.18.0 (fixes >= 0.9.0, <= 0.17.0) | — | 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)
PyPI(1)
| Package | Vulnerable range | Fix by version range | Dependents |
|---|---|---|---|
| compose-lint | 0.10.0 ... 0.9.0 (14 versions) |
| — |
Weakness Classification(1)
MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.
Data Freshness Timeline
(refreshed 8× in last 7d / 8× 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 its CVE.org record (CNA or CISA ADP). An arrow marks a change the record states ("CVSS → 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). "EchelonGraph re-scored" is our own recompute of this CVE's score, not an update from a source, and is not counted in the refreshes above. Most recent first.
- 2026-11-12 22:30 UTCEchelonGraph re-scored
- 2026-11-12 22:30 UTCGHSA enrichmentGHSA-65v8-q222-64xx · GitHub severity MODERATE
- 2026-11-12 16:33 UTCEPSS rescoreEPSS 0.3% · 26th percentile
- 2026-11-11 16:38 UTCEPSS rescoreEPSS 0.3% · 26th percentile
- 2026-11-11 07:27 UTCGHSA enrichmentGHSA-65v8-q222-64xx · GitHub severity MODERATE
- 2026-11-10 17:14 UTCEchelonGraph re-scored
- 2026-11-10 17:14 UTCGHSA enrichmentGHSA-65v8-q222-64xx · GitHub severity MODERATE
- 2026-11-10 16:42 UTCEPSS rescoreEPSS 0.3% · 26th percentile
- 2026-11-09 18:27 UTCEchelonGraph re-scored
- 2026-11-09 18:00 UTCENISA EUVD ID recordedEUVD-2026-120127 · Source: ENISA EUVD
- 2026-11-09 17:40 UTCEchelonGraph re-scoredFirst assessed: 5.1 MEDIUM
- 2026-11-09 17:39 UTCMITRE cvelistV5first tracked
Related CVEs(same product + same CWE)
Same product
9 shownPyPI:compose-lint
Frequently asked(5)
What is CVE-2026-123370?
When was the CVE record for CVE-2026-123370 published?
Is CVE-2026-123370 actively exploited?
What is the CVSS score of CVE-2026-123370?
How do I remediate CVE-2026-123370?
Dependency Blast Radius
See which npm, PyPI, Go, and Maven packages are affected by CVE-2026-123370
Is Your Infrastructure Affected by CVE-2026-123370?
EchelonGraph automatically scans your cloud infrastructure and maps CVE exposure using blast radius analysis.