CVE-2026-64679

HIGHPre-NVD 8.18.1—
EchelonGraph scoreMEDIUM confidence

This high-severity CVE scores 8.1 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.4%, top 69% 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).

Triggered by: NVD CVSS baseline
Sources: epss, secondary
Trending — 3 sources updated this weekElevated
8.1EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 8.1Exploit: Elevated riskExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

Atlantis is a self-hosted golang application that listens for Terraform pull request events via webhooks. From 0.19.8 until 0.45.0, Atlantis does not consistently validate user-controlled workspace values supplied through accepted repository-level atlantis.yaml configuration or authenticated /api/plan input before joining them into local workspace paths. Traversal segments can escape the intended per-pull workspace directory and cause clone preparation or other working-directory code paths to call os.RemoveAll, os.MkdirAll, or related filesystem operations on out-of-bounds directories before Terraform rejects the invalid workspace name. This can create, delete, or reuse writable paths with the privileges of the Atlantis process, causing integrity loss or denial of service. This issue is fixed in version 0.45.0.

CVSS v3
8.1
EG Score
8.1(medium)
EG Risk
52(Track*)
EG Risk 52/100SSVC: 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 computed
Severity81% × 45%
Exploitation40% × 40%
Automatability0% × 15%
Action: Watch closely — could escalate to Attend.
EPSS PROB
0%
EPSS %ILE
31%
KEV
Not listed

Published

August 21, 2026

Last Modified

August 25, 2026

Advisory Details (4)

Auto-updated Aug 21, 2026
🔬 Proof of concept available. Patch available. Sources: github, github_pr, github_commit, github_release.
github_release Patch Available

v0.45.0

Patch available: runatlantis/atlantis v0.45.0

https://github.com/runatlantis/atlantis/releases/tag/v0.45.0
github_commit

commit ea4e4ceebf8b (runatlantis/atlantis)

Fix landed in runatlantis/atlantis commit ea4e4ceebf8b — awaiting tagged release

https://github.com/runatlantis/atlantis/commit/ea4e4ceebf8b387d015fff7ed8a7fcca33279afe
github_pr

fix: resolve CWE-22 uncontrolled data used in path expression vulnerabilities

Fix merged in runatlantis/atlantis PR #6254 on 2026-06-26 — awaiting tagged release

https://github.com/runatlantis/atlantis/pull/6254
github Patch Available🟡 PoC Available

Path Traversal in Atlantis Workspace Handling Allows Out-of-Bounds Directory Deletion/Creation · Advisory · runatlantis/atlantis · GitHub

https://github.com/runatlantis/atlantis/security/advisories/GHSA-26w5-6g95-gj28

Vendor Advisories for CVE-2026-64679(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/runatlantis/atlantis—0.45.0—

Weakness Classification(2)

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.

  1. 2026-08-26 05:17 UTCEG score recompute
  2. 2026-08-25 17:26 UTCEG score recompute
  3. 2026-08-25 17:15 UTCEG score recompute
  4. 2026-08-25 13:49 UTCEPSS rescore
  5. 2026-08-24 20:18 UTCEG score recompute
  6. 2026-08-23 08:50 UTCEG score recompute
  7. 2026-08-23 00:19 UTCEPSS rescore
  8. 2026-08-21 21:24 UTCEG score recompute
  9. 2026-08-21 20:34 UTCEG score recompute
  10. 2026-08-21 20:34 UTCMITRE cvelistV5first tracked

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-64679?
CVE-2026-64679 is a high vulnerability published on August 21, 2026. Atlantis is a self-hosted golang application that listens for Terraform pull request events via webhooks. From 0.19.8 until 0.45.0, Atlantis does not consistently validate user-controlled workspace values supplied through accepted repository-level atlantis.yaml configuration or authenticated…
When was CVE-2026-64679 disclosed?
CVE-2026-64679 was first published in the National Vulnerability Database on August 21, 2026, with the most recent update on August 25, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-64679 actively exploited?
CVE-2026-64679 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0% probability of exploitation in the next 30 days, which ranks it in the top 68.9% of all scored CVEs.
What is the CVSS score of CVE-2026-64679?
CVE-2026-64679 has a CVSS v3 base score of 8.1 (NVD).
How do I remediate CVE-2026-64679?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-64679, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

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