CVE-2025-8036
published 2025-07-22CVE-2025-8036: Thunderbird cached CORS preflight responses across IP address changes. This allowed circumventing CORS with DNS rebinding. This vulnerability was fixed in…
PriorityP338high8.1CVSS 3.1
AVNACLPRNUIRSUCHIHAN
EPSS
0.42%
33.8th percentile
Thunderbird cached CORS preflight responses across IP address changes. This allowed circumventing CORS with DNS rebinding. This vulnerability was fixed in Firefox 141, Firefox ESR 140.1, Thunderbird 141, and Thunderbird 140.1.
Affected
7 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| debian | firefox | < firefox 141.0-1 (sid) | firefox 141.0-1 (sid) |
| mozilla | firefox | < 140.1.0 | 140.1.0 |
| mozilla | firefox | < 141.0 | 141.0 |
| mozilla | firefox | — | — |
| mozilla | thunderbird | < 140.1.0 | 140.1.0 |
| mozilla | thunderbird | < 141.0 | 141.0 |
| mozilla | thunderbird | >= 0 < 1:140.7.1+build1-0ubuntu0.22.04.1 | 1:140.7.1+build1-0ubuntu0.22.04.1 |
CVSS provenance
nvdv3.18.1HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N
osv8.1HIGH
vendor_debian8.1HIGH
vendor_redhat8.1HIGH
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Ubuntu
Thunderbird vulnerabilities
vendor_ubuntu·2026-02-02
CVE-2025-8031 Thunderbird vulnerabilities
Title: Thunderbird vulnerabilities
Summary: Several security issues were fixed in Thunderbird.
Multiple security issues were discovered in Thunderbird. If a user were
tricked into opening a specially crafted website in a browsing context,
an attacker could potentially exploit these to cause a denial of service,
obtain sensitive information, bypass security restrictions, cross-site
tracing, or execute arbitrary code.
Instructions: In general, a standard system update will make all the necessary changes.
Red Hat
firefox: thunderbird: DNS rebinding circumvents CORS
vendor_redhat·2025-07-22·CVSS 8.1
CVE-2025-8036 [HIGH] CWE-350 firefox: thunderbird: DNS rebinding circumvents CORS
firefox: thunderbird: DNS rebinding circumvents CORS
Thunderbird cached CORS preflight responses across IP address changes. This allowed circumventing CORS with DNS rebinding. This vulnerability affects Firefox < 141, Firefox ESR < 140.1, Thunderbird < 141, and Thunderbird < 140.1.
A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the following issue:
Firefox caches CORS preflight responses across IP address changes. This allows circumventing CORS with DNS rebinding.
Statement: Red Hat Product Security rates the severity of this flaw as determined by the Mozilla Foundation Security Advisory.
Package: firefox (Red Hat Enterprise Linux 10) - Not affected
Package: rhel10/firefox-flatpak (Red Hat Enterprise Linux 10) - Not affected
Package:
Debian
CVE-2025-8036: firefox - Thunderbird cached CORS preflight responses across IP address changes. This allo...
vendor_debian·2025·CVSS 8.1
CVE-2025-8036 [HIGH] CVE-2025-8036: firefox - Thunderbird cached CORS preflight responses across IP address changes. This allo...
Thunderbird cached CORS preflight responses across IP address changes. This allowed circumventing CORS with DNS rebinding. This vulnerability affects Firefox < 141, Firefox ESR < 140.1, Thunderbird < 141, and Thunderbird < 140.1.
Scope: local
sid: resolved (fixed in 141.0-1)
Mozilla
Mozilla Foundation Security Advisory 2025-63: CVE-2025-8036
vendor_mozilla·CVSS 8.1
CVE-2025-8036 [HIGH] Mozilla Foundation Security Advisory 2025-63: CVE-2025-8036
Mozilla Foundation Security Advisory 2025-63
CVE: CVE-2025-8036
Product: Thunderbird
Impact: high
Fixed in: Thunderbird 140.1
Mozilla
Mozilla Foundation Security Advisory 2025-56: CVE-2025-8036
vendor_mozilla·CVSS 8.1
CVE-2025-8036 [HIGH] Mozilla Foundation Security Advisory 2025-56: CVE-2025-8036
Mozilla Foundation Security Advisory 2025-56
CVE: CVE-2025-8036
Product: Firefox
Impact: high
Fixed in: Firefox 141
Mozilla
Mozilla Foundation Security Advisory 2025-59: CVE-2025-8036
vendor_mozilla·CVSS 8.1
CVE-2025-8036 [HIGH] Mozilla Foundation Security Advisory 2025-59: CVE-2025-8036
Mozilla Foundation Security Advisory 2025-59
CVE: CVE-2025-8036
Product: Firefox ESR
Impact: high
Fixed in: Firefox ESR 140.1
Mozilla
Mozilla Foundation Security Advisory 2025-61: CVE-2025-8036
vendor_mozilla·CVSS 8.1
CVE-2025-8036 [HIGH] Mozilla Foundation Security Advisory 2025-61: CVE-2025-8036
Mozilla Foundation Security Advisory 2025-61
CVE: CVE-2025-8036
Product: Thunderbird
Impact: high
Fixed in: Thunderbird 141
OSV
CVE-2025-8036: Thunderbird cached CORS preflight responses across IP address changes
osv·2025-07-22·CVSS 8.1
CVE-2025-8036 [HIGH] CVE-2025-8036: Thunderbird cached CORS preflight responses across IP address changes
Thunderbird cached CORS preflight responses across IP address changes. This allowed circumventing CORS with DNS rebinding. This vulnerability affects Firefox < 141, Firefox ESR < 140.1, Thunderbird < 141, and Thunderbird < 140.1.
GHSA
GHSA-5g22-6w6r-pr2m: Thunderbird cached CORS preflight responses across IP address changes
ghsa_unreviewed·2025-07-22
CVE-2025-8036 [HIGH] CWE-350 GHSA-5g22-6w6r-pr2m: Thunderbird cached CORS preflight responses across IP address changes
Thunderbird cached CORS preflight responses across IP address changes. This allowed circumventing CORS with DNS rebinding. This vulnerability affects Firefox < 141, Firefox ESR < 140.1, Thunderbird < 141, and Thunderbird < 140.1.
No detection rules found.
No public exploits indexed.
https://bugzilla.mozilla.org/show_bug.cgi?id=1960834https://www.mozilla.org/security/advisories/mfsa2025-56/https://www.mozilla.org/security/advisories/mfsa2025-59/https://www.mozilla.org/security/advisories/mfsa2025-61/https://www.mozilla.org/security/advisories/mfsa2025-63/https://www.kb.cert.org/vuls/id/652514
2025-07-22
Published