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CVE-2026-53900

Firefox for iOS preserved cookies set on the initial PDF request across cross-origin HTTP redirects in TemporaryDocument, allowing a malicious site to inject arbitrary cookies into requests to an unrelated target domain. This vulnerability was fixed in Firefox for iOS 152.0.
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:4f5991914d16b26ce49a706a1db88720aca39c570b3814fc1edc979c624f9087
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-345","description":"CWE-345 Insufficient Verification of Data Authenticity","lang":"en","type":"CWE"}

  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:8f74ee6f5ac75aadbe3fb5c200c8b79a1df96787577c2e4006bad28bd14f4b51 · sha256:fbe4fa5fade528b1… · /containers/adp/0/problemTypes/0/descriptions/0

{"cweId":"CWE-384","description":"CWE-384 Session Fixation","lang":"en","type":"CWE"}

  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:8f74ee6f5ac75aadbe3fb5c200c8b79a1df96787577c2e4006bad28bd14f4b51 · sha256:fbe4fa5fade528b1… · /containers/adp/0/problemTypes/1/descriptions/0

Affected products and versions

1 source assertion
{"product":"Firefox for iOS","vendor":"Mozilla","versions":[{"lessThanOrEqual":"*","status":"unaffected","version":"152.0","versionType":"rpm"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:8f74ee6f5ac75aadbe3fb5c200c8b79a1df96787577c2e4006bad28bd14f4b51 · sha256:fbe4fa5fade528b1… · /containers/cna/affected/0

Provider-owned CVSS observations

1 source assertion
{"metric":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"NONE","baseScore":4.3,"baseSeverity":"MEDIUM","confidentialityImpact":"LOW","integrityImpact":"NONE","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"REQUIRED","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N","version":"3.1"},"metric_type":"cvssV3_1"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:8f74ee6f5ac75aadbe3fb5c200c8b79a1df96787577c2e4006bad28bd14f4b51 · sha256:fbe4fa5fade528b1… · /containers/adp/0/metrics/0/cvssV3_1

CWE assertions

2 source assertions
{"cweId":"CWE-345","description":"CWE-345 Insufficient Verification of Data Authenticity","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:8f74ee6f5ac75aadbe3fb5c200c8b79a1df96787577c2e4006bad28bd14f4b51 · sha256:fbe4fa5fade528b1… · /containers/adp/0/problemTypes/0/descriptions/0
{"cweId":"CWE-384","description":"CWE-384 Session Fixation","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:8f74ee6f5ac75aadbe3fb5c200c8b79a1df96787577c2e4006bad28bd14f4b51 · sha256:fbe4fa5fade528b1… · /containers/adp/0/problemTypes/1/descriptions/0

Source references

2 source assertions
{"url":"https://bugzilla.mozilla.org/show_bug.cgi?id=2043204"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:8f74ee6f5ac75aadbe3fb5c200c8b79a1df96787577c2e4006bad28bd14f4b51 · sha256:fbe4fa5fade528b1… · /containers/cna/references/0
{"url":"https://www.mozilla.org/security/advisories/mfsa2026-56/"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:8f74ee6f5ac75aadbe3fb5c200c8b79a1df96787577c2e4006bad28bd14f4b51 · sha256:fbe4fa5fade528b1… · /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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