CVE-2026-45623
postcss: PostCSS: Information disclosure and denial of service via crafted CSS input
Severidad por fuente
La etiqueta propia de Trivy es CRITICAL. Crítica según NVD. Más baja según GHSA (alta), Red Hat (media).
Descripción
PostCSS takes a CSS file and provides an API to analyze and modify its rules by transforming the rules into an Abstract Syntax Tree. In versions 8.5.11 and prior, the PreviousMap parses the /*# sourceMappingURL=PATH */ comment from any CSS string passed to process() and dereferences PATH against the local filesystem with no scheme, allowlist, or traversal check. An attacker who controls the CSS input can cause the host process to read any file readable by Node and leak the first ~10 bytes of its content through the resulting JSON.parse SyntaxError message. The bug also yields a precise file-existence oracle and a controllable-read primitive that may be combined with large-file targets for DoS. The behaviour is triggered with PostCSS's default options — no from, no map, no plugins required — and is therefore reachable from any pipeline that runs untrusted CSS through PostCSS (CMS themes, user-uploaded styles, browser-extension/userstyle processors, build pipelines for third-party packages, blog comment renderers, etc.). This issue has been fixed in version 8.5.12.
Paquetes afectados y versiones corregidas
| Fuente | Paquete | Corregido en |
|---|---|---|
| chainguard | arangodb-3.11, arangodb-3.12, authentik-2025.12 y 36 más | 3.11.14.5-r1 y 33 más |
| debian 11 | node-postcss | sin corrección indicada |
| debian 12 | node-postcss | sin corrección indicada |
| debian 13 | node-postcss | sin corrección indicada |
| debian 14 | node-postcss | 8.5.12+~cs9.3.32-1 |
| echo | node-postcss | sin corrección indicada |
| echo npm::Echo OSV | postcss | 8.5.12 |
| minimos | homepage, kubeflow-pipelines-frontend, langfuse-3 y 4 más | 2.0.0-r0 y 6 más |
| npm::GitHub Security Advisory npm | postcss | 8.5.12 |
| rapidfort alma 10 | goose | sin corrección indicada |
| rapidfort alma 9 | goose | sin corrección indicada |
| rapidfort debian 12 | node-postcss | 0:8.5.12+~cs9.3.32-1 |
Mostrar las 77 entradas de 21 fuentes
| Fuente | Paquete | Corregido en |
|---|---|---|
| chainguard | arangodb-3.11 | 3.11.14.5-r1 |
| chainguard | arangodb-3.12 | 3.12.9.4-r22 |
| chainguard | authentik-2025.12 | 2025.12.6-r6 |
| chainguard | authentik-2026.2 | 2026.2.6-r9 |
| chainguard | authentik-2026.5 | 2026.5.6-r4 |
| chainguard | authentik-fips-2026.2 | 2026.2.6-r5 |
| chainguard | authentik-fips-2026.5 | 2026.5.6-r3 |
| chainguard | cadence-web | 4.0.16-r4 |
| chainguard | commercial-gitlab-rails-ee-19.1 | 19.1.7-r3 |
| chainguard | commercial-gitlab-rails-ee-19.2 | 19.2.7-r1 |
| chainguard | commercial-gitlab-rails-ee-19.3 | 19.3.3-r1 |
| chainguard | commercial-gitlab-rails-ee-19.4 | 19.4.1-r1 |
| chainguard | commercial-gitlab-rails-ee-fips-19.1 | 19.1.9-r0 |
| chainguard | commercial-gitlab-rails-ee-fips-19.2 | 19.2.7-r1 |
| chainguard | commercial-gitlab-rails-ee-fips-19.3 | 19.3.3-r1 |
| chainguard | commercial-gitlab-rails-ee-fips-19.4 | 19.4.1-r1 |
| chainguard | gitlab-rails-ce-18.11 | 18.11.13-r0 |
| chainguard | gitlab-rails-ce-19.0 | 19.0.10-r0 |
| chainguard | gitlab-rails-ce-19.1 | 19.1.7-r6 |
| chainguard | gitlab-rails-ce-19.2 | 19.2.5-r2 |
| chainguard | gitlab-rails-ce-19.3 | 19.3.1-r6 |
| chainguard | gitlab-rails-ce-fips-18.10 | 18.10.8-r8 |
| chainguard | gitlab-rails-ce-fips-18.11 | 18.11.12-r2 |
| chainguard | gitlab-rails-ce-fips-18.9 | 18.9.8-r8 |
| chainguard | gitlab-rails-ce-fips-19.0 | 19.0.9-r3 |
| chainguard | gitlab-rails-ce-fips-19.1 | 19.1.7-r3 |
| chainguard | gitlab-rails-ce-fips-19.2 | 19.2.5-r2 |
| chainguard | gitlab-rails-ce-fips-19.3 | 19.3.1-r3 |
| chainguard | keep | 0.54.2-r2 |
| chainguard | keep-fips | 0.54.2-r3 |
| chainguard | langfuse-3 | 3.225.7-r6 |
| chainguard | langfuse-fips-3 | 3.224.2-r0 |
| chainguard | nextcloud-server-31 | 31.0.14-r6 |
| chainguard | nextcloud-server-33 | 33.0.7-r4 |
| chainguard | nextcloud-server-34 | 34.0.2-r2 |
| chainguard | pelias-api | 7.8.0-r7 |
| chainguard | semaphore | 2.18.29-r2 |
| chainguard | vitess-23 | 23.0.5-r5 |
| chainguard | vitess-24 | 24.0.3-r7 |
| debian 11 | node-postcss | sin corrección indicada |
| debian 12 | node-postcss | sin corrección indicada |
| debian 13 | node-postcss | sin corrección indicada |
| debian 14 | node-postcss | 8.5.12+~cs9.3.32-1 |
| echo | node-postcss | sin corrección indicada |
| echo npm::Echo OSV | postcss | 8.5.12 |
| minimos | homepage | 2.0.0-r0 |
| minimos | kubeflow-pipelines-frontend | 2.17.0-r0 |
| minimos | langfuse-3 | 3.224.2-r0 |
| minimos | n8n | 2.36.6-r0 |
| minimos | openclaw | 2026.4.29-r0 |
| minimos | trigger-dev | 4.5.11-r1 |
| minimos | verdaccio | 6.6.0-r0 |
| npm::GitHub Security Advisory npm | postcss | 8.5.12 |
| rapidfort alma 10 | goose | sin corrección indicada |
| rapidfort alma 9 | goose | sin corrección indicada |
| rapidfort debian 12 | node-postcss | 0:8.5.12+~cs9.3.32-1 |
| rapidfort debian 13 | node-postcss | 0:8.5.12+~cs9.3.32-1 |
| rapidfort fedora 43 | goose | 1.45.0-2.fc43 |
| rapidfort Oracle Linux 10 | goose | sin corrección indicada |
| rapidfort Oracle Linux 9 | goose | sin corrección indicada |
| rapidfort Red Hat 10 | goose | sin corrección indicada |
| rapidfort Red Hat 9 | goose | sin corrección indicada |
| Red Hat | goose | sin corrección indicada |
| Red Hat | nodejs-css-loader | sin corrección indicada |
| Red Hat | nodejs-sanitize-html | sin corrección indicada |
| Red Hat | openshift4/ose-console | sin corrección indicada |
| Red Hat | openshift4/ose-console-rhel9 | sin corrección indicada |
| Red Hat | postcss | sin corrección indicada |
| Red Hat | satellite/iop-advisor-frontend-rhel9 | sin corrección indicada |
| Red Hat | satellite/iop-host-inventory-frontend-rhel9 | sin corrección indicada |
| Red Hat | satellite/iop-vulnerability-frontend-rhel9 | sin corrección indicada |
| seal npm::Seal Security Database | @seal-security/postcss | 7.0.35-sp999, 7.0.39-sp2, 8.3.6-sp999, 8.4.20-sp999, 8.4.30-sp999 |
| seal npm::Seal Security Database | postcss | 7.0.35-sp999, 7.0.39-sp2, 8.3.6-sp999, 8.4.20-sp999, 8.4.30-sp999 |
| wolfi | langfuse-3 | 3.225.7-r6 |
| wolfi | nextcloud-server-33 | 33.0.7-r4 |
| wolfi | vitess-23 | 23.0.5-r5 |
| wolfi | vitess-24 | 24.0.3-r7 |
Referencias
- https://access.redhat.com/security/cve/CVE-2026-45623
- https://advisory.echohq.com/cve/CVE-2026-45623
- https://github.com/advisories/GHSA-6g55-p6wh-862q
- https://github.com/postcss/postcss
- https://github.com/postcss/postcss/commit/aaec7b78b3ce2792585b4b300ef1bd5dd5b3e8ad
- https://github.com/postcss/postcss/commit/c64b7488d2731dfa16213739b42c34faf5a9eba3
- https://github.com/postcss/postcss/releases/tag/8.5.12
- https://github.com/postcss/postcss/security/advisories/GHSA-6g55-p6wh-862q