Baitaphish
Security intelligence
SearchLatest briefing
CVE Explorer

CVE-2026-45623

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
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:67f4edd6475529cca6d152f741f9f0aa3f8f71c04896f383453999904748f659
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
1

Preserved source conflicts

No provider value was silently selected as the winner.

cwe · 2 assertions

{"cweId":"CWE-22","description":"CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')","lang":"en","type":"CWE"}

  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:fca5ac179a9daecaf50f098894143aee37acfcc0eff03f03a36c95cbe03db293 · sha256:f250b299dba6cdb2… · /containers/cna/problemTypes/0/descriptions/0

{"cweId":"CWE-200","description":"CWE-200: Exposure of Sensitive Information to an Unauthorized Actor","lang":"en","type":"CWE"}

  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:fca5ac179a9daecaf50f098894143aee37acfcc0eff03f03a36c95cbe03db293 · sha256:f250b299dba6cdb2… · /containers/cna/problemTypes/1/descriptions/0

Affected products and versions

1 source assertion
{"product":"postcss","vendor":"postcss","versions":[{"status":"affected","version":"< 8.5.12"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:fca5ac179a9daecaf50f098894143aee37acfcc0eff03f03a36c95cbe03db293 · sha256:f250b299dba6cdb2… · /containers/cna/affected/0

Provider-owned CVSS observations

1 source assertion
{"metric":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"NONE","baseScore":7.5,"baseSeverity":"HIGH","confidentialityImpact":"HIGH","integrityImpact":"NONE","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N","version":"3.1"},"metric_type":"cvssV3_1"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:fca5ac179a9daecaf50f098894143aee37acfcc0eff03f03a36c95cbe03db293 · sha256:f250b299dba6cdb2… · /containers/cna/metrics/0/cvssV3_1

CWE assertions

2 source assertions
{"cweId":"CWE-22","description":"CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:fca5ac179a9daecaf50f098894143aee37acfcc0eff03f03a36c95cbe03db293 · sha256:f250b299dba6cdb2… · /containers/cna/problemTypes/0/descriptions/0
{"cweId":"CWE-200","description":"CWE-200: Exposure of Sensitive Information to an Unauthorized Actor","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:fca5ac179a9daecaf50f098894143aee37acfcc0eff03f03a36c95cbe03db293 · sha256:f250b299dba6cdb2… · /containers/cna/problemTypes/1/descriptions/0

Source references

2 source assertions
{"tags":["exploit"],"url":"https://github.com/postcss/postcss/security/advisories/GHSA-6g55-p6wh-862q"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:fca5ac179a9daecaf50f098894143aee37acfcc0eff03f03a36c95cbe03db293 · sha256:f250b299dba6cdb2… · /containers/adp/0/references/0
{"name":"https://github.com/postcss/postcss/security/advisories/GHSA-6g55-p6wh-862q","tags":["x_refsource_CONFIRM"],"url":"https://github.com/postcss/postcss/security/advisories/GHSA-6g55-p6wh-862q"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:fca5ac179a9daecaf50f098894143aee37acfcc0eff03f03a36c95cbe03db293 · sha256:f250b299dba6cdb2… · /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.

← Back to CVE Explorer