CVE Explorer
CVE-2026-23986
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 structu
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
0
Affected products and versions
1 source assertion{"product":"copier","vendor":"copier-org","versions":[{"status":"affected","version":"< 9.11.2"}]}
- cve_program_cvelist_v5affectedurn:baitaphish:normalized-source-record:v2:3ae6fe71a5072131332f3233fd11ed7bbaac77099a02176dce40bcde613b7a7c · sha256:e6547397b36fd989… · /containers/cna/affected/0
Provider-owned CVSS observations
1 source assertion{"metric":{"attackComplexity":"LOW","attackRequirements":"NONE","attackVector":"LOCAL","baseScore":6.9,"baseSeverity":"MEDIUM","privilegesRequired":"NONE","subAvailabilityImpact":"NONE","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","userInteraction":"PASSIVE","vectorString":"CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:N/VI:H/VA:H/SC:N/SI:N/SA:N","version":"4.0","vulnAvailabilityImpact":"HIGH","vulnConfidentialityImpact":"NONE","vulnIntegrityImpact":"HIGH"},"metric_type":"cvssV4_0"}
- cve_program_cvelist_v5cvssurn:baitaphish:normalized-source-record:v2:3ae6fe71a5072131332f3233fd11ed7bbaac77099a02176dce40bcde613b7a7c · sha256:e6547397b36fd989… · /containers/cna/metrics/0/cvssV4_0
CWE assertions
1 source assertion{"cweId":"CWE-61","description":"CWE-61: UNIX Symbolic Link (Symlink) Following","lang":"en","type":"CWE"}
- cve_program_cvelist_v5cweurn:baitaphish:normalized-source-record:v2:3ae6fe71a5072131332f3233fd11ed7bbaac77099a02176dce40bcde613b7a7c · sha256:e6547397b36fd989… · /containers/cna/problemTypes/0/descriptions/0
Source references
3 source assertions{"name":"https://github.com/copier-org/copier/commit/b3a7b3772d17cf0e7a4481978188c9f536c8d8f6","tags":["x_refsource_MISC"],"url":"https://github.com/copier-org/copier/commit/b3a7b3772d17cf0e7a4481978188c9f536c8d8f6"}
- cve_program_cvelist_v5referenceurn:baitaphish:normalized-source-record:v2:3ae6fe71a5072131332f3233fd11ed7bbaac77099a02176dce40bcde613b7a7c · sha256:e6547397b36fd989… · /containers/cna/references/1
{"name":"https://github.com/copier-org/copier/releases/tag/v9.11.2","tags":["x_refsource_MISC"],"url":"https://github.com/copier-org/copier/releases/tag/v9.11.2"}
- cve_program_cvelist_v5referenceurn:baitaphish:normalized-source-record:v2:3ae6fe71a5072131332f3233fd11ed7bbaac77099a02176dce40bcde613b7a7c · sha256:e6547397b36fd989… · /containers/cna/references/2
{"name":"https://github.com/copier-org/copier/security/advisories/GHSA-4fqp-r85r-hxqh","tags":["x_refsource_CONFIRM"],"url":"https://github.com/copier-org/copier/security/advisories/GHSA-4fqp-r85r-hxqh"}
- cve_program_cvelist_v5referenceurn:baitaphish:normalized-source-record:v2:3ae6fe71a5072131332f3233fd11ed7bbaac77099a02176dce40bcde613b7a7c · sha256:e6547397b36fd989… · /containers/cna/references/0
Attribution and limitations
- CVE Program CVEList V5: Reproduce the MITRE copyright designation and CVE license in copies. Source →
Provider severity values are preserved separately. Baitaphish does not convert them into a risk rating, infer affected products, or treat EPSS as observed exploitation.