CVE-2026-23986

HIGHNVD 7.17.1—
EchelonGraph scoreMEDIUM confidence

This high-severity CVE scores 7.1 under NVD CVSS v3. EPSS exploit probability: 0.2%, top 87% 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, nvd
7.1
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 0%CVSS: 7.1Exploit: NoneExposed: 0

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

Copier is a library and CLI app for rendering project templates. Prior to version 9.11.2, Copier suggests that it's safe to generate a project from a safe template, i.e. one that doesn't use unsafe features like custom Jinja extensions which would require passing the --UNSAFE,--trust flag. As it turns out, a safe template can currently write to arbitrary directories outside the destination path by using directory a symlink along with _preserve_symlinks: true and a generated directory structure whose rendered path is inside the symlinked directory. This way, a malicious template author can create a template that overwrites arbitrary files (according to the user's write permissions), e.g., to cause havoc. Version 9.11.2 patches the issue.

CVSS v3
7.1
EG Score
7.1(medium)
EG Risk
32(Track)
EG Risk 32/100SSVC: 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
Severity71% × 45%
Exploitation0% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS
13.1%
KEV
Not listed

Published

January 21, 2026

Last Modified

February 2, 2026

References (3)

Affected Packages

(1 across 1 ecosystem)
PyPI(1)
PackageVulnerable rangeFixed inDependents
copier2.0.0 ... 9.9.1 (76 versions)9.11.2—

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 13× in last 7d / 52× 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. 2026-07-23 03:07 UTCEG score recompute
  2. 2026-07-22 14:08 UTCEPSS rescore
  3. 2026-07-21 15:24 UTCEPSS rescore
  4. 2026-07-21 15:24 UTCEPSS rescore
  5. 2026-07-20 17:08 UTCEPSS rescore
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  19. 2026-07-13 21:08 UTCOSV refresh
  20. 2026-07-13 06:13 UTCEPSS rescore
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  1. 2026-07-08 15:15 UTCEPSS rescore
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  20. 2026-06-27 03:08 UTCEPSS rescore
  21. 2026-06-25 18:46 UTCOSV refresh
  22. 2026-06-25 13:49 UTCEPSS rescore
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  24. 2026-06-24 14:05 UTCEPSS rescore
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  26. 2026-06-23 21:33 UTCEPSS rescore
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  28. 2026-06-22 14:25 UTCEPSS rescore
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  30. 2026-06-21 14:56 UTCEPSS rescore
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  51. 2026-06-07 15:25 UTCEPSS rescore
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  54. 2026-06-06 13:47 UTCEPSS rescore
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  58. 2026-06-05 06:10 UTCEPSS rescore
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  68. 2026-05-31 22:30 UTCEPSS rescore
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  70. 2026-05-31 00:16 UTCEPSS rescore
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  72. 2026-05-31 00:16 UTCEPSS rescore
  73. 2026-05-29 15:29 UTCEG score recompute
  74. 2026-05-29 13:44 UTCEPSS rescore
  75. 2026-05-29 13:44 UTCEPSS rescore

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-23986?
CVE-2026-23986 is a high vulnerability published on January 21, 2026. Copier is a library and CLI app for rendering project templates. Prior to version 9.11.2, Copier suggests that it's safe to generate a project from a safe template, i.e. one that doesn't use unsafe features like custom Jinja extensions which would require passing the --UNSAFE,--trust flag. As it…
When was CVE-2026-23986 disclosed?
CVE-2026-23986 was first published in the National Vulnerability Database on January 21, 2026, with the most recent update on February 2, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-23986 actively exploited?
CVE-2026-23986 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 13.1% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-23986?
CVE-2026-23986 has a CVSS v3 base score of 7.1 (NVD).
How do I remediate CVE-2026-23986?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-23986, 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.

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