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CVE-2026-52842

Lightpanda is a headless browser designed for AI and automation. Prior to 0.3.1, Lightpanda searched for @ across the entire URL string instead of only the authority component when computing a page origin, so a URL such as `http://attacker.com/@victim.com/` was fetched from attacker.com but treated as `http://victim.com`, allowing a complete Same-Origin Policy bypass. This issue is fixed in version 0.3.1.
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:14c99a4aa6799fb32048574b58a39f0bbabcc7029bef611badb43d4625d4455a
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
0

Affected products and versions

1 source assertion
{"product":"browser","vendor":"lightpanda-io","versions":[{"status":"affected","version":"< 0.3.1"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:98651d32952bba6fdc1f2b4693cd849228f5b7b1c4cfea1c5b3113a4addb5d5b · sha256:a3fca64602d691ef… · /containers/cna/affected/0

Provider-owned CVSS observations

1 source assertion
{"metric":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"NONE","baseScore":9.3,"baseSeverity":"CRITICAL","confidentialityImpact":"HIGH","integrityImpact":"HIGH","privilegesRequired":"NONE","scope":"CHANGED","userInteraction":"REQUIRED","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:N","version":"3.1"},"metric_type":"cvssV3_1"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:98651d32952bba6fdc1f2b4693cd849228f5b7b1c4cfea1c5b3113a4addb5d5b · sha256:a3fca64602d691ef… · /containers/cna/metrics/0/cvssV3_1

CWE assertions

1 source assertion
{"cweId":"CWE-346","description":"CWE-346: Origin Validation Error","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:98651d32952bba6fdc1f2b4693cd849228f5b7b1c4cfea1c5b3113a4addb5d5b · sha256:a3fca64602d691ef… · /containers/cna/problemTypes/0/descriptions/0

Source references

4 source assertions
{"name":"https://github.com/lightpanda-io/browser/commit/0588cc374d4af9687cf6f45a7d52f7af04bbacfb","tags":["x_refsource_MISC"],"url":"https://github.com/lightpanda-io/browser/commit/0588cc374d4af9687cf6f45a7d52f7af04bbacfb"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:98651d32952bba6fdc1f2b4693cd849228f5b7b1c4cfea1c5b3113a4addb5d5b · sha256:a3fca64602d691ef… · /containers/cna/references/2
{"name":"https://github.com/lightpanda-io/browser/pull/1998","tags":["x_refsource_MISC"],"url":"https://github.com/lightpanda-io/browser/pull/1998"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:98651d32952bba6fdc1f2b4693cd849228f5b7b1c4cfea1c5b3113a4addb5d5b · sha256:a3fca64602d691ef… · /containers/cna/references/1
{"name":"https://github.com/lightpanda-io/browser/releases/tag/0.3.1","tags":["x_refsource_MISC"],"url":"https://github.com/lightpanda-io/browser/releases/tag/0.3.1"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:98651d32952bba6fdc1f2b4693cd849228f5b7b1c4cfea1c5b3113a4addb5d5b · sha256:a3fca64602d691ef… · /containers/cna/references/3
{"name":"https://github.com/lightpanda-io/browser/security/advisories/GHSA-mq6p-m9cc-q432","tags":["x_refsource_CONFIRM"],"url":"https://github.com/lightpanda-io/browser/security/advisories/GHSA-mq6p-m9cc-q432"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:98651d32952bba6fdc1f2b4693cd849228f5b7b1c4cfea1c5b3113a4addb5d5b · sha256:a3fca64602d691ef… · /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.

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