CVE-2026-45623
unknown
CVSS v3
—
CVSS v4 NEW
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VIR risk
—
Description
PostCSS: Arbitrary file read and information disclosure via attacker-controlled sourceMappingURL in CSS comments
Predictions
Exploit likelihood
30%
Patch ETA
—
Heuristic predictions, AS-IS, for prioritization only.
Mitigations
No mitigations published for this CVE yet.
The vendor-content worker queues fetches as references arrive (check back in a few minutes). Or — if you've already worked around this in production — publish your fix to the community-verified tier.
✚ Propose a mitigation on Community → Mitigations published via the community go through AI scoring + 2 human reviewers + 7-day silent objection window before landing here withsource_tier=community-verified.
Package impact
| Ecosystem | Package | Vulnerable | Fixed |
|---|---|---|---|
| npm | postcss | <8.5.12 | 8.5.12 |
References
- https://github.com/postcss/postcss/security/advisories/GHSA-6g55-p6wh-862q
- https://github.com/postcss/postcss/commit/aaec7b78b3ce2792585b4b300ef1bd5dd5b3e8ad
- https://github.com/postcss/postcss/commit/c64b7488d2731dfa16213739b42c34faf5a9eba3
- https://github.com/postcss/postcss
- https://github.com/postcss/postcss/releases/tag/8.5.12
Community-verified mitigations for this CVE will appear above when contributors publish them.
Verify integrity in audit chain (admin only). AS-IS.