CVE-2026-0883
published 2026-01-13CVE-2026-0883: Information disclosure in the Networking component. This vulnerability was fixed in Firefox 147, Firefox ESR 140.7, Thunderbird 147, and Thunderbird 140.7.
PriorityP427medium5.3CVSS 3.1
AVNACLPRNUINSUCLINAN
EPSS
0.41%
33.3th percentile
Information disclosure in the Networking component. This vulnerability was fixed in Firefox 147, Firefox ESR 140.7, Thunderbird 147, and Thunderbird 140.7.
Affected
13 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| apache | httpd | — | — |
| debian | firefox | < firefox 147.0-1 (sid) | firefox 147.0-1 (sid) |
| debian | firefox-esr | < firefox 147.0-1 (sid) | firefox 147.0-1 (sid) |
| debian | thunderbird | < firefox 147.0-1 (sid) | firefox 147.0-1 (sid) |
| mozilla | firefox | < 140.7.0 | 140.7.0 |
| mozilla | firefox | < 147.0 | 147.0 |
| mozilla | firefox | — | — |
| mozilla | thunderbird | < 140.7.0 | 140.7.0 |
| mozilla | thunderbird | < 147.0 | 147.0 |
| mozilla | thunderbird | >= 0 < 1:140.7.0esr-1~deb11u1 | 1:140.7.0esr-1~deb11u1 |
| mozilla | thunderbird | >= 0 < 1:140.7.0esr-1~deb12u1 | 1:140.7.0esr-1~deb12u1 |
| mozilla | thunderbird | >= 0 < 1:140.7.0esr-1~deb13u1 | 1:140.7.0esr-1~deb13u1 |
| mozilla | thunderbird | >= 0 < 1:140.7.0esr-1 | 1:140.7.0esr-1 |
CVSS provenance
nvdv3.15.3MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
osv5.3MEDIUM
vendor_apache6.9LOW
vendor_debian5.3MEDIUM
vendor_redhat5.3MEDIUM
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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: Information disclosure in the Networking component
vendor_redhat·2026-01-13·CVSS 5.3
CVE-2026-0883 [MEDIUM] firefox: thunderbird: Information disclosure in the Networking component
firefox: thunderbird: Information disclosure in the Networking component
Information disclosure in the Networking component. This vulnerability affects Firefox < 147, Firefox ESR < 140.7, Thunderbird < 147, and Thunderbird < 140.7.
A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the following issue:
Information disclosure in the Networking 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
Package: thunderbird (Red Hat Enterprise Linu
Debian
CVE-2026-0883: firefox - Information disclosure in the Networking component. This vulnerability affects F...
vendor_debian·2026·CVSS 5.3
CVE-2026-0883 [MEDIUM] CVE-2026-0883: firefox - Information disclosure in the Networking component. This vulnerability affects F...
Information disclosure in the Networking component. This vulnerability affects Firefox < 147, Firefox ESR < 140.7, Thunderbird < 147, and Thunderbird < 140.7.
Scope: local
sid: resolved (fixed in 147.0-1)
Mozilla
Mozilla Foundation Security Advisory 2026-01: CVE-2026-0883
vendor_mozilla·CVSS 5.3
CVE-2026-0883 [MEDIUM] Mozilla Foundation Security Advisory 2026-01: CVE-2026-0883
Mozilla Foundation Security Advisory 2026-01
CVE: CVE-2026-0883
Product: Firefox
Impact: moderate
Fixed in: Firefox 147
Mozilla
Mozilla Foundation Security Advisory 2026-03: CVE-2026-0883
vendor_mozilla·CVSS 5.3
CVE-2026-0883 [MEDIUM] Mozilla Foundation Security Advisory 2026-03: CVE-2026-0883
Mozilla Foundation Security Advisory 2026-03
CVE: CVE-2026-0883
Product: Firefox ESR
Impact: high
Fixed in: Firefox ESR 140.7
Mozilla
Mozilla Foundation Security Advisory 2026-05: CVE-2026-0883
vendor_mozilla·CVSS 5.3
CVE-2026-0883 [MEDIUM] Mozilla Foundation Security Advisory 2026-05: CVE-2026-0883
Mozilla Foundation Security Advisory 2026-05
CVE: CVE-2026-0883
Product: Thunderbird
Impact: high
Fixed in: Thunderbird 140.7
Mozilla
Mozilla Foundation Security Advisory 2026-04: CVE-2026-0883
vendor_mozilla·CVSS 5.3
CVE-2026-0883 [MEDIUM] Mozilla Foundation Security Advisory 2026-04: CVE-2026-0883
Mozilla Foundation Security Advisory 2026-04
CVE: CVE-2026-0883
Product: Thunderbird
Impact: moderate
Fixed in: Thunderbird 147
Apache
Apache httpd: CVE-2012-0883
vendor_apache·CVSS 6.9
CVE-2012-0883 [LOW] Apache httpd: CVE-2012-0883
Apache httpd: CVE-2012-0883
Insecure handling of LD_LIBRARY_PATH was found that could lead to the current working directory to be searched for DSOs. This could allow a local user to execute code as root if an administrator runs apachectl from an untrusted directory. Reported to security team 2012-02-14 Issue public 2012-03-02 Update 2.4.2 released 2012-04-17 Update 2.2.23 released 2012-09-13 Affects 2.4.1, 2.2.22, 2.2.21, 2.2.20, 2.2.19, 2.2.18, 2.2.17, 2.2.16, 2.2.15, 2.2.14, 2.2.13, 2.2.12, 2.2.11, 2.2.10, 2.2.9, 2.2.8, 2.2.6, 2.2.5, 2.2.4, 2.2.3, 2.2.2, 2.2.0 Copyright © 1997-2026 The Apache Software Foundation. Apache HTTP Server, Apache, the Apache logo and the Apache HTTP Server logo are either registered trademarks or trademarks of The Apache Software Foundation in the United States
GHSA
GHSA-fqpc-v68g-xp98: Information disclosure in the Networking component
ghsa_unreviewed·2026-01-13
CVE-2026-0883 [MEDIUM] CWE-200 GHSA-fqpc-v68g-xp98: Information disclosure in the Networking component
Information disclosure in the Networking component. This vulnerability affects Firefox < 147 and Firefox ESR < 140.7.
OSV
CVE-2026-0883: Information disclosure in the Networking component
osv·2026-01-13·CVSS 5.3
CVE-2026-0883 [MEDIUM] CVE-2026-0883: Information disclosure in the Networking component
Information disclosure in the Networking component. This vulnerability affects Firefox < 147, Firefox ESR < 140.7, Thunderbird < 147, and Thunderbird < 140.7.
No detection rules found.
No public exploits indexed.
Bugzilla
CVE-2026-0883 firefox: thunderbird: Information disclosure in the Networking component
bugzilla·2026-01-13·CVSS 5.3
CVE-2026-0883 [MEDIUM] CVE-2026-0883 firefox: thunderbird: Information disclosure in the Networking component
CVE-2026-0883 firefox: thunderbird: Information disclosure in the Networking component
Information disclosure in the Networking component. This vulnerability affects Firefox < 147 and Firefox ESR < 140.7.
Discussion:
This issue has been addressed in the following products:
Red Hat Enterprise Linux 8
Via RHSA-2026:0667 https://access.redhat.com/errata/RHSA-2026:0667
---
This issue has been addressed in the following products:
Red Hat Enterprise Linux 9
Via RHSA-2026:0694 https://access.redhat.com/errata/RHSA-2026:0694
---
This issue has been addressed in the following products:
Red Hat Enterprise Linux 9
Via RHSA-2026:0924 https://access.redhat.com/errata/RHSA-2026:0924
---
This issue has been addressed in the following products:
Red Hat Enterprise Linux 9.6 Extended Update
Wiz
CVE-2026-0883 Impact, Exploitability, and Mitigation Steps | Wiz
blogs_wiz·CVSS 5.3
CVE-2026-0883 [MEDIUM] CVE-2026-0883 Impact, Exploitability, and Mitigation Steps | Wiz
## CVE-2026-0883 :
NixOS vulnerability analysis and mitigation
Information disclosure in the Networking component. This vulnerability affects Firefox < 147, Firefox ESR < 140.7, Thunderbird < 147, and Thunderbird < 140.7.
Source : NVD
## 5.3
Score
Published January 13, 2026
Severity MEDIUM
CNA Score 5.3
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) 3.1
Exploitation Probability (EPSS) N/A
Affected packages and libraries
MozillaFirefox-devel
rhel10::thunderbird-flatpak.src
Sources
AlmaLinux 8 Severity HIGH Has Fix Added at: Feb 11, 2026
AlmaLinux 9 Severity HIGH Has Fix Added at: Jan 20, 2026
Debian 11, 12, 13, 14 Severity MEDIUM Has
2026-01-13
Published