CVE-2026-53899

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Source
https://cve.org/CVERecord?id=CVE-2026-53899
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-53899.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-53899
Downstream
Related
Published
2026-06-16T11:53:04Z
Modified
2026-08-21T11:48:47Z
Severity
  • 6.5 (Medium) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N CVSS Calculator
Summary
Cross-origin cookies could be leaked when opening a PDF link
Details

Firefox for iOS used partial domain matching when attaching cookies to PDF requests, allowing a malicious site on a suffix domain to receive cookies belonging to the target site. This vulnerability was fixed in Firefox for iOS 152.0.

Database specific 
{
    "cna_assigner": "mozilla",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/53xxx/CVE-2026-53899.json"
}
References

Affected packages

Git / github.com/mozilla-mobile/firefox-ios

Affected ranges

Type
GIT
Repo
https://github.com/mozilla-mobile/firefox-ios
Events
Introduced
0 Unknown introduced commit / All previous commits are affected
Fixed
df0ceea8ef301835448e61fb2ed08a8bd30f8bbf
Database specific
Show details 
{
    "cpe": "cpe:2.3:a:mozilla:firefox_mobile:*:*:*:*:*:iphone_os:*:*",
    "extracted_events": [
        {
            "introduced": "0"
        },
        {
            "fixed": "152.0"
        }
    ],
    "source": "CPE_RANGE"
}

Affected versions

20.*
20.1
Other
AuroraV1
AuroraV10
AuroraV11
AuroraV13
AuroraV14
AuroraV15
AuroraV2
AuroraV3
AuroraV6
AuroraV7
AuroraV8
firefox-v142.*
firefox-v142.0
firefox-v144.*
firefox-v144.1
firefox-v144.2
firefox-v144.3
firefox-v145.*
firefox-v145.2
firefox-v146.*
firefox-v146.1
firefox-v147.*
firefox-v147.4
firefox-v147.5
firefox-v148.*
firefox-v148.1
firefox-v149.*
firefox-v149.0
firefox-v149.2
firefox-v150.*
firefox-v150.1
firefox-v151.*
firefox-v151.0
firefox-v151.1
focus/klar-v143.*
focus/klar-v143.0
focus/klar-v148.*
focus/klar-v148.2

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-53899.json"