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CVE-2026-69153

PostCSS takes a CSS file and provides an API to analyze and modify its rules by transforming the rules into an Abstract Syntax Tree. Prior to 8.5.19, if from is unset, an attacker can cause PreviousMap.loadFile() to read an unintended source-map file by supplying an absolute or directory-traversal sourceMappingURL. The resulting map’s sources and sourcesContent may then be exposed to the application. This issue is fixed in version 8.5.19.
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:7c1430bd2f8784d4fa74516c2854904c0e6666a9f70c31c51d2bc9da01f64f9a
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-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:ec82d140dd0c06ff612fd37e62a31530c4e9bb1e69108d57e0a41b4a6f16e522 · sha256:0b02b05478228d2e… · /containers/cna/problemTypes/1/descriptions/0

{"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:ec82d140dd0c06ff612fd37e62a31530c4e9bb1e69108d57e0a41b4a6f16e522 · sha256:0b02b05478228d2e… · /containers/cna/problemTypes/0/descriptions/0

Affected products and versions

1 source assertion
{"product":"postcss","vendor":"postcss","versions":[{"status":"affected","version":"< 8.5.19"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:ec82d140dd0c06ff612fd37e62a31530c4e9bb1e69108d57e0a41b4a6f16e522 · sha256:0b02b05478228d2e… · /containers/cna/affected/0

Provider-owned CVSS observations

1 source assertion
{"metric":{"attackComplexity":"LOW","attackRequirements":"PRESENT","attackVector":"NETWORK","baseScore":6.3,"baseSeverity":"MEDIUM","privilegesRequired":"NONE","subAvailabilityImpact":"NONE","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","userInteraction":"NONE","vectorString":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N","version":"4.0","vulnAvailabilityImpact":"NONE","vulnConfidentialityImpact":"LOW","vulnIntegrityImpact":"NONE"},"metric_type":"cvssV4_0"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:ec82d140dd0c06ff612fd37e62a31530c4e9bb1e69108d57e0a41b4a6f16e522 · sha256:0b02b05478228d2e… · /containers/cna/metrics/0/cvssV4_0

CWE assertions

2 source assertions
{"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:ec82d140dd0c06ff612fd37e62a31530c4e9bb1e69108d57e0a41b4a6f16e522 · sha256:0b02b05478228d2e… · /containers/cna/problemTypes/1/descriptions/0
{"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:ec82d140dd0c06ff612fd37e62a31530c4e9bb1e69108d57e0a41b4a6f16e522 · sha256:0b02b05478228d2e… · /containers/cna/problemTypes/0/descriptions/0

Source references

4 source assertions
{"name":"https://github.com/postcss/postcss/commit/7beca139e70f9075c6b19700fcb00dd8033e5da8","tags":["x_refsource_MISC"],"url":"https://github.com/postcss/postcss/commit/7beca139e70f9075c6b19700fcb00dd8033e5da8"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:ec82d140dd0c06ff612fd37e62a31530c4e9bb1e69108d57e0a41b4a6f16e522 · sha256:0b02b05478228d2e… · /containers/cna/references/1
{"name":"https://github.com/postcss/postcss/releases/tag/8.5.19","tags":["x_refsource_MISC"],"url":"https://github.com/postcss/postcss/releases/tag/8.5.19"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:ec82d140dd0c06ff612fd37e62a31530c4e9bb1e69108d57e0a41b4a6f16e522 · sha256:0b02b05478228d2e… · /containers/cna/references/2
{"name":"https://github.com/postcss/postcss/security/advisories/GHSA-fxqj-rqcc-2cmp","tags":["x_refsource_CONFIRM"],"url":"https://github.com/postcss/postcss/security/advisories/GHSA-fxqj-rqcc-2cmp"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:ec82d140dd0c06ff612fd37e62a31530c4e9bb1e69108d57e0a41b4a6f16e522 · sha256:0b02b05478228d2e… · /containers/cna/references/0
{"tags":["exploit"],"url":"https://github.com/postcss/postcss/security/advisories/GHSA-fxqj-rqcc-2cmp"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:ec82d140dd0c06ff612fd37e62a31530c4e9bb1e69108d57e0a41b4a6f16e522 · sha256:0b02b05478228d2e… · /containers/adp/0/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.

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