External Secrets Operator reads information from a third-party service and automatically injects the values as Kubernetes Secrets. Starting in version 0.10.0 and prior to version 1.3.2, a bug in the webhook generator initialization order incorrectly cleared the label-enforcement flag (EnforceLabels) after it was set, resulting in the provider-side check for external-secrets.io/type=webhook being skipped (and the operation to succeed while it should have failed with secret does not contain needed label 'external-secrets.io/type: webhook'. Update secret label to use it with webhook. Version 1.3.2 contains a patch.
CVE-2026-26287
HIGHPre-NVD 7.17.1—Trending — 3 sources updated this week
EchelonGraph scoreMEDIUM confidence
This high-severity CVE scores 7.1 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.2% (14th percentile of EPSS-scored CVEs). 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).
Triggered by: NVD CVSS baseline
Sources: epss, secondary
7.1EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
- High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0.2%CVSS: 7.1Exploit: None knownExposed services: Not assessed
A fix is available — apply it.
- CVSS v3
- 7.1
- EG Score
- 7.1HIGHmedium confidence
- EG Risk
- 32EG Risk 32/100CISA SSVC
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 computedSeverity71% × 45%Exploitation0% × 40%Automatability0% × 15%CISA SSVC: Track at every mission impact level.Action: A fix is available. Apply it within your standard update timelines. - EPSS PROB
- 0.2%
- EPSS %ILE
- 14th
- KEV
- Not listed
CISA SSVCTrack 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). Mission impact is CISA's Mission & Well-being decision point, and only you can judge it: high means the affected system is essential to your organisation's mission, or its compromise could cause irreversible harm to people. CISA's decision table
Published
October 6, 2026
Last Modified
October 6, 2026
Advisory Details (4)
Auto-updated Oct 6, 2026Patch available. Sources: github_pr, github_commit, github_release, github.
github_release Patch Available
v1.3.2
Patch available: external-secrets/external-secrets v1.3.2
https://github.com/external-secrets/external-secrets/releases/tag/v1.3.2github_commit
commit 25aa09275861 (external-secrets/external-secrets)
Fix landed in external-secrets/external-secrets commit 25aa09275861 — awaiting tagged release
https://github.com/external-secrets/external-secrets/commit/25aa09275861e3ed6fc5d2a1a60b9ac3df4a93bagithub_pr
fix: webhook initialization order
Fix merged in external-secrets/external-secrets PR #5901 on 2026-02-02 — awaiting tagged release
https://github.com/external-secrets/external-secrets/pull/5901githubMentions a patch (unverified)
Label enforcement bypass in webhook generator enables secret exfiltration · Advisory · external-secrets/external-secrets · GitHub
https://github.com/external-secrets/external-secrets/security/advisories/GHSA-q7hv-xx6h-q2x8Vendor Advisories for CVE-2026-26287(1)
These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.
Affected Packages
(1 across 1 ecosystem)
Go(1)
| Package | Vulnerable range | Fix by version range | Dependents |
|---|---|---|---|
| github.com/external-secrets/external-secrets | — |
| — |
Weakness Classification(1)
MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.
Data Freshness Timeline
(refreshed 10× in last 7d / 10× 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.
- 2026-10-09 20:07 UTCEPSS rescore
- 2026-10-08 19:45 UTCEG score recompute
- 2026-10-08 17:11 UTCEPSS rescore
- 2026-10-08 07:53 UTCEG score recompute
- 2026-10-07 23:47 UTCEPSS rescore
- 2026-10-06 18:32 UTCEG score recompute
- 2026-10-06 17:26 UTCEG score recompute
- 2026-10-06 16:19 UTCEG score recompute
- 2026-10-06 15:48 UTCEG score recompute
- 2026-10-06 15:47 UTCMITRE cvelistV5first tracked
Related CVEs(same product + same CWE)
Same product
5 shownGo:github.com/external-secrets/external-secrets
Frequently asked(5)
What is CVE-2026-26287?
CVE-2026-26287 is a high vulnerability published on October 6, 2026. External Secrets Operator reads information from a third-party service and automatically injects the values as Kubernetes Secrets. Starting in version 0.10.0 and prior to version 1.3.2, a bug in the webhook generator initialization order incorrectly cleared the label-enforcement flag…
When was CVE-2026-26287 disclosed?
CVE-2026-26287 was first published on October 6, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-26287 actively exploited?
CVE-2026-26287 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.2% probability of exploitation in the next 30 days (14th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-26287?
CVE-2026-26287 has a CVSS base score of 7.1 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-26287?
A fix for CVE-2026-26287 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-26287 are linked in the Vendor Advisories panel on this page.
Dependency Blast Radius
See which npm, PyPI, Go, and Maven packages are affected by CVE-2026-26287
Is Your Infrastructure Affected by CVE-2026-26287?
EchelonGraph automatically scans your cloud infrastructure and maps CVE exposure using blast radius analysis.