CVE-2026-2773
published 2026-02-24CVE-2026-2773: Incorrect boundary conditions in the Web Audio component. This vulnerability was fixed in Firefox 148, Firefox ESR 115.33, Firefox ESR 140.8, Thunderbird 148…
PriorityP350critical9.8CVSS 3.1
AVNACLPRNUINSUCHIHAH
EPSS
0.60%
45.1th percentile
Incorrect boundary conditions in the Web Audio component. This vulnerability was fixed in Firefox 148, Firefox ESR 115.33, Firefox ESR 140.8, Thunderbird 148, and Thunderbird 140.8.
Affected
13 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| debian | firefox | < firefox 148.0-1 (sid) | firefox 148.0-1 (sid) |
| debian | firefox-esr | < firefox 148.0-1 (sid) | firefox 148.0-1 (sid) |
| debian | thunderbird | < firefox 148.0-1 (sid) | firefox 148.0-1 (sid) |
| mozilla | firefox | < 115.33.0 | 115.33.0 |
| mozilla | firefox | < 148.0 | 148.0 |
| mozilla | firefox | — | — |
| mozilla | firefox | >= 128.0 < 140.8.0 | 140.8.0 |
| mozilla | thunderbird | < 140.8.0 | 140.8.0 |
| mozilla | thunderbird | < 148.0 | 148.0 |
| mozilla | thunderbird | >= 0 < 1:140.8.0esr-1~deb11u1 | 1:140.8.0esr-1~deb11u1 |
| mozilla | thunderbird | >= 0 < 1:140.8.0esr-1~deb12u1 | 1:140.8.0esr-1~deb12u1 |
| mozilla | thunderbird | >= 0 < 1:140.8.0esr-1~deb13u1 | 1:140.8.0esr-1~deb13u1 |
| mozilla | thunderbird | >= 0 < 1:140.8.0esr-1 | 1:140.8.0esr-1 |
CVSS provenance
nvdv3.19.8CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
osv9.8CRITICAL
vendor_debian9.8CRITICAL
vendor_redhat9.8CRITICAL
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Red Hat
firefox: thunderbird: Incorrect boundary conditions in the Web Audio component
vendor_redhat·2026-02-24·CVSS 9.8
CVE-2026-2773 [CRITICAL] firefox: thunderbird: Incorrect boundary conditions in the Web Audio component
firefox: thunderbird: Incorrect boundary conditions in the Web Audio component
Incorrect boundary conditions in the Web Audio component. This vulnerability affects Firefox < 148, Firefox ESR < 115.33, Firefox ESR < 140.8, Thunderbird < 148, and Thunderbird < 140.8.
A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the following issue:
Incorrect boundary conditions in the Web Audio component
Statement: Red Hat Product Security rates the severity of this flaw as determined by the Mozilla Foundation Security Advisory.
Package: rhel10/firefox-flatpak (Red Hat Enterprise Linux 10) - Affected
Package: rhel10/thunderbird-flatpak (Red Hat Enterprise Linux 10) - Affected
Package: firefox (Red Hat Enterprise Linux 6) - Out of support scope
Packa
Debian
CVE-2026-2773: firefox - Incorrect boundary conditions in the Web Audio component. This vulnerability aff...
vendor_debian·2026·CVSS 9.8
CVE-2026-2773 [CRITICAL] CVE-2026-2773: firefox - Incorrect boundary conditions in the Web Audio component. This vulnerability aff...
Incorrect boundary conditions in the Web Audio component. This vulnerability affects Firefox < 148, Firefox ESR < 115.33, Firefox ESR < 140.8, Thunderbird < 148, and Thunderbird < 140.8.
Scope: local
sid: resolved (fixed in 148.0-1)
Mozilla
Mozilla Foundation Security Advisory 2026-14: CVE-2026-2773
vendor_mozilla·CVSS 9.8
CVE-2026-2773 [CRITICAL] Mozilla Foundation Security Advisory 2026-14: CVE-2026-2773
Mozilla Foundation Security Advisory 2026-14
CVE: CVE-2026-2773
Product: Firefox ESR
Impact: high
Fixed in: Firefox ESR 115.33
Mozilla
Mozilla Foundation Security Advisory 2026-13: CVE-2026-2773
vendor_mozilla·CVSS 9.8
CVE-2026-2773 [CRITICAL] Mozilla Foundation Security Advisory 2026-13: CVE-2026-2773
Mozilla Foundation Security Advisory 2026-13
CVE: CVE-2026-2773
Product: Firefox
Impact: high
Fixed in: Firefox 148
Mozilla
Mozilla Foundation Security Advisory 2026-16: CVE-2026-2773
vendor_mozilla·CVSS 9.8
CVE-2026-2773 [CRITICAL] Mozilla Foundation Security Advisory 2026-16: CVE-2026-2773
Mozilla Foundation Security Advisory 2026-16
CVE: CVE-2026-2773
Product: Thunderbird
Impact: high
Fixed in: Thunderbird 148
Mozilla
Mozilla Foundation Security Advisory 2026-15: CVE-2026-2773
vendor_mozilla·CVSS 9.8
CVE-2026-2773 [CRITICAL] Mozilla Foundation Security Advisory 2026-15: CVE-2026-2773
Mozilla Foundation Security Advisory 2026-15
CVE: CVE-2026-2773
Product: Firefox ESR
Impact: high
Fixed in: Firefox ESR 140.8
Mozilla
Mozilla Foundation Security Advisory 2026-17: CVE-2026-2773
vendor_mozilla·CVSS 9.8
CVE-2026-2773 [CRITICAL] Mozilla Foundation Security Advisory 2026-17: CVE-2026-2773
Mozilla Foundation Security Advisory 2026-17
CVE: CVE-2026-2773
Product: Thunderbird
Impact: high
Fixed in: Thunderbird 140.8
GHSA
FUXA provides guest and invalid-token access to protected read APIs in secure mode
ghsa·2026-05-28
CVE-2026-47718 [MEDIUM] CWE-287 FUXA provides guest and invalid-token access to protected read APIs in secure mode
FUXA provides guest and invalid-token access to protected read APIs in secure mode
### Summary
When `secureEnabled=true`, FUXA `1.3.0-2773` still allows guest and invalid-token requests to read project, alarms, and scheduler APIs.
### Details
In secure mode, requests with no token or an explicitly invalid token were still able to access protected read endpoints.
Confirmed behavior:
- guest `GET /api/project` returned `200 OK`
- invalid-token requests to `/api/project` also returned successful responses containing project data
- guest and invalid-token requests also returned `200 OK` on:
- `/api/alarms`
- `/api/scheduler`
Relevant code paths identified during analysis:
- `server/api/jwt-helper.js`
- `verifyToken()` converts missing-token or invalid-token states into guest context in
GHSA
GHSA-gjwv-rvwj-p62j: Incorrect boundary conditions in the Web Audio component
ghsa_unreviewed·2026-02-24
CVE-2026-2773 [CRITICAL] CWE-119 GHSA-gjwv-rvwj-p62j: Incorrect boundary conditions in the Web Audio component
Incorrect boundary conditions in the Web Audio component. This vulnerability affects Firefox < 148, Firefox ESR < 115.33, and Firefox ESR < 140.8.
OSV
CVE-2026-2773: Incorrect boundary conditions in the Web Audio component
osv·2026-02-24·CVSS 9.8
CVE-2026-2773 [CRITICAL] CVE-2026-2773: Incorrect boundary conditions in the Web Audio component
Incorrect boundary conditions in the Web Audio component. This vulnerability affects Firefox < 148, Firefox ESR < 115.33, Firefox ESR < 140.8, Thunderbird < 148, and Thunderbird < 140.8.
No detection rules found.
No public exploits indexed.
Bugzilla
CVE-2026-2773 firefox: thunderbird: Incorrect boundary conditions in the Web Audio component
bugzilla·2026-02-24·CVSS 9.8
CVE-2026-2773 [CRITICAL] CVE-2026-2773 firefox: thunderbird: Incorrect boundary conditions in the Web Audio component
CVE-2026-2773 firefox: thunderbird: Incorrect boundary conditions in the Web Audio component
Incorrect boundary conditions in the Web Audio component. This vulnerability affects Firefox < 148, Firefox ESR < 115.33, and Firefox ESR < 140.8.
Discussion:
This issue has been addressed in the following products:
Red Hat Enterprise Linux 8
Via RHSA-2026:3338 https://access.redhat.com/errata/RHSA-2026:3338
---
This issue has been addressed in the following products:
Red Hat Enterprise Linux 9
Via RHSA-2026:3339 https://access.redhat.com/errata/RHSA-2026:3339
---
This issue has been addressed in the following products:
Red Hat Enterprise Linux 10
Via RHSA-2026:3361 https://access.redhat.com/errata/RHSA-2026:3361
---
This issue has been addressed in the following products:
Red Hat E
Wiz
CVE-2026-2773 Impact, Exploitability, and Mitigation Steps | Wiz
blogs_wiz·CVSS 9.8
CVE-2026-2773 [CRITICAL] CVE-2026-2773 Impact, Exploitability, and Mitigation Steps | Wiz
## CVE-2026-2773 :
NixOS vulnerability analysis and mitigation
Incorrect boundary conditions in the Web Audio component. This vulnerability affects Firefox < 148, Firefox ESR < 115.33, Firefox ESR < 140.8, Thunderbird < 148, and Thunderbird < 140.8.
Source : NVD
## 9.8
Score
Published February 24, 2026
Severity CRITICAL
CNA Score 9.8
Affected Technologies
NixOS
Mozilla Firefox
Has Public Exploit No
Has CISA KEV Exploit No
CISA KEV Release Date N/A
CISA KEV Due Date N/A
Exploitation Probability Percentile (EPSS) 7.9
Exploitation Probability (EPSS) N/A
Affected packages and libraries
firefox
firefox-debuginfo
Sources
AlmaLinux 8 Severity HIGH Has Fix Added at: Mar 03, 2026
AlmaLinux 9 Severity HIGH Has Fix Added at: Mar 02, 2026
Debian 11, 12, 13, 14 Severity CRITIC
https://bugzilla.mozilla.org/show_bug.cgi?id=2014832https://www.mozilla.org/security/advisories/mfsa2026-13/https://www.mozilla.org/security/advisories/mfsa2026-14/https://www.mozilla.org/security/advisories/mfsa2026-15/https://www.mozilla.org/security/advisories/mfsa2026-16/https://www.mozilla.org/security/advisories/mfsa2026-17/https://access.redhat.com/errata/RHSA-2026:3338https://access.redhat.com/errata/RHSA-2026:3339https://access.redhat.com/errata/RHSA-2026:3361https://access.redhat.com/errata/RHSA-2026:3491https://access.redhat.com/errata/RHSA-2026:3492https://access.redhat.com/errata/RHSA-2026:3493https://access.redhat.com/errata/RHSA-2026:3494https://access.redhat.com/errata/RHSA-2026:3495https://access.redhat.com/errata/RHSA-2026:3496https://access.redhat.com/errata/RHSA-2026:3497https://access.redhat.com/errata/RHSA-2026:3515https://access.redhat.com/errata/RHSA-2026:3516https://access.redhat.com/errata/RHSA-2026:3517https://access.redhat.com/errata/RHSA-2026:3976https://access.redhat.com/errata/RHSA-2026:3978https://access.redhat.com/errata/RHSA-2026:3979https://access.redhat.com/errata/RHSA-2026:3980https://access.redhat.com/errata/RHSA-2026:3981https://access.redhat.com/errata/RHSA-2026:3982https://access.redhat.com/errata/RHSA-2026:3983https://access.redhat.com/errata/RHSA-2026:3984https://access.redhat.com/errata/RHSA-2026:4022https://access.redhat.com/errata/RHSA-2026:4152https://access.redhat.com/errata/RHSA-2026:4260https://access.redhat.com/errata/RHSA-2026:4432https://access.redhat.com/security/cve/CVE-2026-2773https://bugzilla.redhat.com/show_bug.cgi?id=2442319https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-2773.json
2026-02-24
Published