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: 0.8% (55th 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
Elevated
8.1EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0.8%CVSS: 8.1Exploit: Elevated riskExposed services: Not assessed

A fix is available — apply it.

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
8.1HIGHmedium confidence
EG Risk
52
EG Risk 52/100CISA 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
Severity81% × 45%
Exploitation40% × 40%
Automatability0% × 15%
CISA SSVC: Track at low, Track* at medium and Attend at high mission impact.
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
0.8%
EPSS %ILE
55th
KEV
Not listed

CISA SSVCTrack at low, Track* at medium and Attend at high mission impact.

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

Exploitation public PoC (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact total (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

August 21, 2026

Last Modified

September 9, 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
githubMentions a patch (unverified)🟡 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 rangeFix by version rangeDependents
github.com/runatlantis/atlantis—
  • 0.19.8 up to 0.45.0: fixed in 0.45.0
—

Weakness Classification(2)

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

Data Freshness Timeline

(refreshed 11× in last 7d / 48× 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. 2026-10-09 20:07 UTCEPSS rescore
  2. 2026-10-09 05:45 UTCEG score recompute
  3. 2026-10-08 17:13 UTCEPSS rescore
  4. 2026-10-08 04:53 UTCEG score recompute
  5. 2026-10-07 23:48 UTCEPSS rescore
  6. 2026-10-06 21:18 UTCEG score recompute
  7. 2026-10-06 15:18 UTCEPSS rescore
  8. 2026-10-05 20:33 UTCEG score recompute
  9. 2026-10-05 17:43 UTCEPSS rescore
  10. 2026-10-05 08:44 UTCEG score recompute
  11. 2026-10-04 23:22 UTCEPSS rescore
  12. 2026-10-03 16:42 UTCEG score recompute
  13. 2026-10-03 14:26 UTCEPSS rescore
  14. 2026-10-02 21:34 UTCEG score recompute
  15. 2026-10-02 17:56 UTCEPSS rescore
  16. 2026-10-01 21:24 UTCEG score recompute
  17. 2026-10-01 19:50 UTCEPSS rescore
  18. 2026-09-30 20:25 UTCEG score recompute
  19. 2026-09-30 15:03 UTCEPSS rescore
  20. 2026-09-29 15:38 UTCEG score recompute
  21. 2026-09-29 02:06 UTCEG score recompute
  22. 2026-09-28 14:16 UTCEG score recompute
  23. 2026-09-28 13:51 UTCEPSS rescore
  24. 2026-09-27 14:39 UTCEG score recompute
  25. 2026-09-27 02:26 UTCEG score recompute
Show 59 more
  1. 2026-09-26 15:59 UTCEPSS rescore
  2. 2026-09-24 20:26 UTCEG score recompute
  3. 2026-09-23 20:48 UTCEG score recompute
  4. 2026-09-23 17:54 UTCEPSS rescore
  5. 2026-09-22 21:09 UTCEG score recompute
  6. 2026-09-21 21:13 UTCEG score recompute
  7. 2026-09-20 21:36 UTCEG score recompute
  8. 2026-09-20 20:16 UTCEPSS rescore
  9. 2026-09-19 21:58 UTCEG score recompute
  10. 2026-09-18 21:37 UTCEG score recompute
  11. 2026-09-18 19:28 UTCEPSS rescore
  12. 2026-09-17 21:16 UTCEG score recompute
  13. 2026-09-16 19:41 UTCEG score recompute
  14. 2026-09-16 14:08 UTCEPSS rescore
  15. 2026-09-16 07:11 UTCEG score recompute
  16. 2026-09-16 05:15 UTCEPSS rescore
  17. 2026-09-15 07:33 UTCEG score recompute
  18. 2026-09-13 20:06 UTCEG score recompute
  19. 2026-09-12 20:28 UTCEG score recompute
  20. 2026-09-11 20:50 UTCEG score recompute
  21. 2026-09-11 14:53 UTCEPSS rescore
  22. 2026-09-11 09:37 UTCEPSS rescore
  23. 2026-09-10 21:01 UTCEG score recompute
  24. 2026-09-09 01:45 UTCEG score recompute
  25. 2026-09-08 22:01 UTCEPSS rescore
  26. 2026-09-07 20:01 UTCEG score recompute
  27. 2026-09-07 16:01 UTCEPSS rescore
  28. 2026-09-06 20:23 UTCEG score recompute
  29. 2026-09-06 13:47 UTCEPSS rescore
  30. 2026-09-05 20:41 UTCEG score recompute
  31. 2026-09-05 15:31 UTCEPSS rescore
  32. 2026-09-04 21:04 UTCEG score recompute
  33. 2026-09-04 08:26 UTCEG score recompute
  34. 2026-09-04 05:07 UTCEPSS rescore
  35. 2026-09-02 20:57 UTCEG score recompute
  36. 2026-09-02 14:12 UTCEPSS rescore
  37. 2026-09-01 17:49 UTCEG score recompute
  38. 2026-09-01 13:54 UTCEPSS rescore
  39. 2026-09-01 05:57 UTCEG score recompute
  40. 2026-09-01 04:40 UTCEPSS rescore
  41. 2026-08-31 05:17 UTCEG score recompute
  42. 2026-08-30 19:17 UTCEPSS rescore
  43. 2026-08-30 05:39 UTCEG score recompute
  44. 2026-08-30 01:22 UTCEPSS rescore
  45. 2026-08-29 05:55 UTCEG score recompute
  46. 2026-08-28 21:42 UTCEPSS rescore
  47. 2026-08-27 18:18 UTCEG score recompute
  48. 2026-08-26 17:52 UTCEG score recompute
  49. 2026-08-26 14:47 UTCEPSS rescore
  50. 2026-08-26 05:17 UTCEG score recompute
  51. 2026-08-25 17:26 UTCEG score recompute
  52. 2026-08-25 17:15 UTCEG score recompute
  53. 2026-08-25 13:49 UTCEPSS rescore
  54. 2026-08-24 20:18 UTCEG score recompute
  55. 2026-08-23 08:50 UTCEG score recompute
  56. 2026-08-23 00:19 UTCEPSS rescore
  57. 2026-08-21 21:24 UTCEG score recompute
  58. 2026-08-21 20:34 UTCEG score recompute
  59. 2026-08-21 20:34 UTCMITRE cvelistV5first tracked

Related CVEs(same product + same CWE)

Same product

3 shown

Go:github.com/runatlantis/atlantis

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 on August 21, 2026, with the most recent update on September 9, 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 0.8% probability of exploitation in the next 30 days (55th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-64679?
CVE-2026-64679 has a CVSS base score of 8.1 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-64679?
A fix for CVE-2026-64679 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-64679 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

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