CVE-2026-62866

MEDIUMPre-NVD 6.26.2—
EchelonGraph scoreMEDIUM confidence

This medium-severity CVE scores 6.2 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.2% (8th 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
6.2EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0.2%CVSS: 6.2Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

Dasel is a command-line tool and library for querying, modifying, and transforming data structures. From 3.0.0 until 3.11.2, selector/lexer/tokenize.go parseCurRune advances the input index across trailing whitespace and then reads the source at the exhausted index without an end-of-input check. A selector ending in whitespace, including input passed through lexer.NewTokenizer(...).Tokenize() or dasel.Query, can therefore cause an index-out-of-range panic and terminate the process. This issue is fixed in version 3.11.2.

CVSS v3
6.2
EG Score
6.2MEDIUMmedium confidence
EG Risk
32
EG 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 computed
Severity62% × 45%
Exploitation0% × 40%
Automatability30% × 15%
CISA SSVC: Track at low or medium mission impact; Track or Attend at high (mission-essential systems).
Action: A fix is available. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high.
EPSS PROB
0.2%
EPSS %ILE
8th
KEV
Not listed

CISA SSVCTrack at low or medium mission impact; Track or Attend at high (mission-essential systems).

A fix is available. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high.

Exploitation none (no KEV listing, exploit record or EPSS ≥ 50%) · Automatable unknown (not published for this CVE) · Technical impact partial (CVSS below 9.0). 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

September 21, 2026

Last Modified

September 24, 2026

Advisory Details (3)

Auto-updated Sep 21, 2026
Patch available. Sources: github, github_commit, github_release.
github_release Patch Available

v3.11.2

Patch available: TomWright/dasel v3.11.2

https://github.com/TomWright/dasel/releases/tag/v3.11.2
github_commit

commit eee03aec28d4 (TomWright/dasel)

Fix landed in TomWright/dasel commit eee03aec28d4 — awaiting tagged release

https://github.com/TomWright/dasel/commit/eee03aec28d4a33d6138098d065b7b37b85e3c55
github Patch Available

Selector lexer panics on trailing whitespace in `parseCurRune` · Advisory · TomWright/dasel · GitHub

https://github.com/TomWright/dasel/security/advisories/GHSA-65gg-g7rw-6cpc

Vendor Advisories for CVE-2026-62866(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)
PackageVulnerable rangeFixed inDependents
github.com/tomwright/dasel/v3—3.11.2—

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 11× in last 7d / 20× 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.

  1. 2026-10-03 14:26 UTCEPSS rescore
  2. 2026-10-03 12:52 UTCEG score recompute
  3. 2026-10-02 17:56 UTCEPSS rescore
  4. 2026-10-02 10:58 UTCEG score recompute
  5. 2026-10-01 19:50 UTCEPSS rescore
  6. 2026-10-01 09:05 UTCEG score recompute
  7. 2026-09-30 15:03 UTCEPSS rescore
  8. 2026-09-30 07:12 UTCEG score recompute
  9. 2026-09-29 05:18 UTCEG score recompute
  10. 2026-09-28 13:51 UTCEPSS rescore
  11. 2026-09-28 03:25 UTCEG score recompute
  12. 2026-09-27 01:31 UTCEG score recompute
  13. 2026-09-26 15:59 UTCEPSS rescore
  14. 2026-09-24 21:37 UTCEG score recompute
  15. 2026-09-23 22:14 UTCEG score recompute
  16. 2026-09-23 17:54 UTCEPSS rescore
  17. 2026-09-22 20:21 UTCEG score recompute
  18. 2026-09-21 17:25 UTCEG score recompute
  19. 2026-09-21 16:55 UTCEG score recompute
  20. 2026-09-21 16:55 UTCMITRE cvelistV5first tracked

Related CVEs(same product + same CWE)

Frequently asked(5)

What is CVE-2026-62866?
CVE-2026-62866 is a medium vulnerability published on September 21, 2026. Dasel is a command-line tool and library for querying, modifying, and transforming data structures. From 3.0.0 until 3.11.2, selector/lexer/tokenize.go parseCurRune advances the input index across trailing whitespace and then reads the source at the exhausted index without an end-of-input check. A…
When was CVE-2026-62866 disclosed?
CVE-2026-62866 was first published on September 21, 2026, with the most recent update on September 24, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-62866 actively exploited?
CVE-2026-62866 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.2% probability of exploitation in the next 30 days (8th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-62866?
CVE-2026-62866 has a CVSS base score of 6.2 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-62866?
A fix for CVE-2026-62866 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-62866 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

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