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CVE-2026-9358

A vulnerability was determined in postcss-selector-parser up to 6.1.2/7.1.2. Affected is the function toString of the file src/selectors/container.js of the component AST Serialization. Executing a manipulation can lead to uncontrolled recursion. It is possible to launch the attack remotely. The exploit has been publicly disclosed and may be utilized. Upgrading to version 6.1.3 and 7.1.3 is able to address this issue. This patch is called 5bc698cef66f8abd12610dc623e5d67cbc0f869d. It is suggested
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:2824f5d3860bc89af682524b7d0696dbe705e43f6f6c60a70524de01668121c2
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
2

Preserved source conflicts

No provider value was silently selected as the winner.

cvss · 4 assertions

{"metric":{"baseScore":4.3,"baseSeverity":"MEDIUM","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L/E:P/RL:O/RC:C","version":"3.1"},"metric_type":"cvssV3_1"}

  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:2d795490fc2719c638df7091ed2dbc2805c1b77e82efcdd7603868db264e57a7 · sha256:208b74e1cf6c2a11… · /containers/cna/metrics/1/cvssV3_1

{"metric":{"baseScore":4.3,"baseSeverity":"MEDIUM","vectorString":"CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L/E:P/RL:O/RC:C","version":"3.0"},"metric_type":"cvssV3_0"}

  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:2d795490fc2719c638df7091ed2dbc2805c1b77e82efcdd7603868db264e57a7 · sha256:208b74e1cf6c2a11… · /containers/cna/metrics/2/cvssV3_0

{"metric":{"baseScore":5.3,"baseSeverity":"MEDIUM","vectorString":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P","version":"4.0"},"metric_type":"cvssV4_0"}

  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:2d795490fc2719c638df7091ed2dbc2805c1b77e82efcdd7603868db264e57a7 · sha256:208b74e1cf6c2a11… · /containers/cna/metrics/0/cvssV4_0

{"metric":{"baseScore":5,"vectorString":"AV:N/AC:L/Au:N/C:N/I:N/A:P/E:POC/RL:OF/RC:C","version":"2.0"},"metric_type":"cvssV2_0"}

  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:2d795490fc2719c638df7091ed2dbc2805c1b77e82efcdd7603868db264e57a7 · sha256:208b74e1cf6c2a11… · /containers/cna/metrics/3/cvssV2_0
cwe · 2 assertions

{"cweId":"CWE-674","description":"Uncontrolled Recursion","lang":"en","type":"CWE"}

  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:2d795490fc2719c638df7091ed2dbc2805c1b77e82efcdd7603868db264e57a7 · sha256:208b74e1cf6c2a11… · /containers/cna/problemTypes/0/descriptions/0

{"cweId":"CWE-404","description":"Denial of Service","lang":"en","type":"CWE"}

  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:2d795490fc2719c638df7091ed2dbc2805c1b77e82efcdd7603868db264e57a7 · sha256:208b74e1cf6c2a11… · /containers/cna/problemTypes/1/descriptions/0

Affected products and versions

1 source assertion
{"cpes":["cpe:2.3:a:postcss-selector-parser:postcss-selector-parser:*:*:*:*:*:*:*:*"],"modules":["AST Serialization"],"product":"postcss-selector-parser","vendor":"n/a","versions":[{"status":"affected","version":"6.1.0"},{"status":"affected","version":"6.1.1"},{"status":"affected","version":"6.1.2"},{"status":"affected","version":"7.1.0"},{"status":"affected","version":"7.1.1"},{"status":"affected","version":"7.1.2"},{"status":"unaffected","version":"6.1.3"},{"status":"unaffected","version":"7.1.3"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:2d795490fc2719c638df7091ed2dbc2805c1b77e82efcdd7603868db264e57a7 · sha256:208b74e1cf6c2a11… · /containers/cna/affected/0

Provider-owned CVSS observations

4 source assertions
{"metric":{"baseScore":4.3,"baseSeverity":"MEDIUM","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L/E:P/RL:O/RC:C","version":"3.1"},"metric_type":"cvssV3_1"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:2d795490fc2719c638df7091ed2dbc2805c1b77e82efcdd7603868db264e57a7 · sha256:208b74e1cf6c2a11… · /containers/cna/metrics/1/cvssV3_1
{"metric":{"baseScore":4.3,"baseSeverity":"MEDIUM","vectorString":"CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L/E:P/RL:O/RC:C","version":"3.0"},"metric_type":"cvssV3_0"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:2d795490fc2719c638df7091ed2dbc2805c1b77e82efcdd7603868db264e57a7 · sha256:208b74e1cf6c2a11… · /containers/cna/metrics/2/cvssV3_0
{"metric":{"baseScore":5.3,"baseSeverity":"MEDIUM","vectorString":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P","version":"4.0"},"metric_type":"cvssV4_0"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:2d795490fc2719c638df7091ed2dbc2805c1b77e82efcdd7603868db264e57a7 · sha256:208b74e1cf6c2a11… · /containers/cna/metrics/0/cvssV4_0
{"metric":{"baseScore":5,"vectorString":"AV:N/AC:L/Au:N/C:N/I:N/A:P/E:POC/RL:OF/RC:C","version":"2.0"},"metric_type":"cvssV2_0"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:2d795490fc2719c638df7091ed2dbc2805c1b77e82efcdd7603868db264e57a7 · sha256:208b74e1cf6c2a11… · /containers/cna/metrics/3/cvssV2_0

CWE assertions

2 source assertions
{"cweId":"CWE-674","description":"Uncontrolled Recursion","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:2d795490fc2719c638df7091ed2dbc2805c1b77e82efcdd7603868db264e57a7 · sha256:208b74e1cf6c2a11… · /containers/cna/problemTypes/0/descriptions/0
{"cweId":"CWE-404","description":"Denial of Service","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:2d795490fc2719c638df7091ed2dbc2805c1b77e82efcdd7603868db264e57a7 · sha256:208b74e1cf6c2a11… · /containers/cna/problemTypes/1/descriptions/0

Source references

7 source assertions
{"tags":["exploit"],"url":"https://gist.github.com/bx33661/581e3a38134601c04e19b4dfc9b459b9"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:2d795490fc2719c638df7091ed2dbc2805c1b77e82efcdd7603868db264e57a7 · sha256:208b74e1cf6c2a11… · /containers/cna/references/4
{"tags":["patch"],"url":"https://github.com/postcss/postcss-selector-parser/commit/5bc698cef66f8abd12610dc623e5d67cbc0f869d"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:2d795490fc2719c638df7091ed2dbc2805c1b77e82efcdd7603868db264e57a7 · sha256:208b74e1cf6c2a11… · /containers/cna/references/5
{"tags":["patch"],"url":"https://github.com/postcss/postcss-selector-parser/releases/tag/7.1.3"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:2d795490fc2719c638df7091ed2dbc2805c1b77e82efcdd7603868db264e57a7 · sha256:208b74e1cf6c2a11… · /containers/cna/references/6
{"name":"CVE-2026-9358 | CVE Analysis and Report","tags":["third-party-advisory"],"url":"https://vuldb.com/cve/CVE-2026-9358"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:2d795490fc2719c638df7091ed2dbc2805c1b77e82efcdd7603868db264e57a7 · sha256:208b74e1cf6c2a11… · /containers/cna/references/2
{"name":"Submit #813080 | postcss-selector-parser postcss <= 7.1.1 CWE-674: Uncontrolled Recursion","tags":["third-party-advisory"],"url":"https://vuldb.com/submit/813080"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:2d795490fc2719c638df7091ed2dbc2805c1b77e82efcdd7603868db264e57a7 · sha256:208b74e1cf6c2a11… · /containers/cna/references/3
{"name":"VDB-365321 | postcss-selector-parser AST Serialization container.js toString recursion","tags":["vdb-entry","technical-description"],"url":"https://vuldb.com/vuln/365321"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:2d795490fc2719c638df7091ed2dbc2805c1b77e82efcdd7603868db264e57a7 · sha256:208b74e1cf6c2a11… · /containers/cna/references/0
{"name":"VDB-365321 | CTI Indicators (IOB, IOC, TTP, IOA)","tags":["signature","permissions-required"],"url":"https://vuldb.com/vuln/365321/cti"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:2d795490fc2719c638df7091ed2dbc2805c1b77e82efcdd7603868db264e57a7 · sha256:208b74e1cf6c2a11… · /containers/cna/references/1

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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