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ALSA-2023:1802 — Important: thunderbird security update

2026-10-02T15:36:21.446935+00:00

Affected: AlmaLinux:8: thunderbird

Mozilla Thunderbird is a standalone mail and newsgroup client.

This update upgrades Thunderbird to version 102.10.0.

Security Fix(es):

* Thunderbird: Revocation status of S/Mime recipient certificates was not checked (CVE-2023-0547) * Mozilla: Matrix SDK bundled with Thunderbird vulnerable to denial-of-service attack (CVE-2023-28427) * Mozilla: Fullscreen notification obscured (CVE-2023-29533) * Mozilla: Potential Memory Corruption following Garbage Collector compaction (CVE-2023-29535) * Mozilla: Invalid free from JavaScript code (CVE-2023-29536) * Mozilla: Memory safety bugs fixed in Firefox 112 and Firefox ESR 102.10 (CVE-2023-29550) * Mozilla: Memory Corruption in Safe Browsing Code (CVE-2023-1945) * Thunderbird: Hang when processing certain OpenPGP messages (CVE-2023-29479) * Mozilla: Content-Disposition filename truncation leads to Reflected File Download (CVE-2023-29539) * Mozilla: Files with malicious extensions could have been downloaded unsafely on Linux (CVE-2023-29541) * Mozilla: Incorrect optimization result on ARM64 (CVE-2023-29548) * MFSA-TMP-2023-0001 Mozilla: Double-free in libwebp (BZ#2186102)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

bdu:2023-01835

2026-10-02T15:36:21.447019+00:00

bdu:2023-01835

certfr-2023-avi-0268 — Une vulnérabilité a été découverte dans Mozilla Thunderbird. Elle permet à un attaquant de…

2026-10-02T15:36:21.447038+00:00

certfr-2023-avi-0268

CLEANSTART-2024-KH83435 — matrix-js-sdk is a Matrix messaging protocol Client-Server SDK for JavaScript

2026-10-02T15:36:21.447054+00:00

Affected: CleanStart: element-web

Security vulnerability affects the element-web package. matrix-js-sdk is a Matrix messaging protocol Client-Server SDK for JavaScript.

EUVD-2026-218133

2026-10-02T15:36:21.447076+00:00

EUVD-2026-218133

fkie_cve-2023-28427

2026-10-02T15:36:21.447087+00:00

matrix-js-sdk is a Matrix messaging protocol Client-Server SDK for JavaScript. In versions prior to 24.0.0 events sent with special strings in key places can temporarily disrupt or impede the matrix-js-sdk from functioning properly, potentially impacting the consumer's ability to process data safely. Note that the matrix-js-sdk can appear to be operating normally but be excluding or corrupting runtime data presented to the consumer. This vulnerability is distinct from GHSA-rfv9-x7hh-xc32 which covers a similar issue. The issue has been patched in matrix-js-sdk 24.0.0 and users are advised to upgrade. There are no known workarounds for this vulnerability.

GHSA-mwq8-fjpf-c2gr — Prototype pollution in matrix-js-sdk (part 2)

2026-10-02T15:36:21.447113+00:00

Affected: npm: matrix-js-sdk

### Impact

In certain configurations, data sent by remote servers containing special strings in key locations could cause modifications of the `Object.prototype`, disrupting matrix-js-sdk functionality, causing denial of service and potentially affecting program logic.

(This is part 2, where [CVE-2022-36059](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2022-36059) / [GHSA-rfv9-x7hh-xc32](https://github.com/matrix-org/matrix-js-sdk/security/advisories/GHSA-rfv9-x7hh-xc32) is part 1. Part 2 covers remaining vectors not covered by part 1, found in a codebase audit scheduled after part 1.)

### Patches The issue has been patched in matrix-js-sdk 24.0.0.

### Workarounds None.

### References

- [Release blog post](https://matrix.org/blog/2023/03/28/security-releases-matrix-js-sdk-24-0-0-and-matrix-react-sdk-3-69-0) - The advisory [GHSA-rfv9-x7hh-xc32](https://github.com/matrix-org/matrix-js-sdk/security/advisories/GHSA-rfv9-x7hh-xc32) ([CVE-2022-36059](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2022-36059)) refers to an initial set of vulnerable locations discovered and patched in matrix-js-sdk 19.4.0. We opted not to disclose that advisory while we performed an audit of the codebase and are now disclosing it jointly with this one.

### For more information If you have any questions or comments about this advisory please email us at [security at matrix.org](mailto:security@matrix.org).

gsd-2023-28427

2026-10-02T15:36:21.447147+00:00

gsd-2023-28427

openSUSE-SU-2024:12823-1 — element-web-1.11.26-1.1 on GA media

2026-10-02T15:36:21.447159+00:00

element-web-1.11.26-1.1 on GA media

RHSA-2023:1803 — Red Hat Security Advisory: thunderbird security update

2026-10-02T15:36:21.447176+00:00

Thunderbird: Revocation status of S/Mime recipient certificates was not checked Mozilla: Memory Corruption in Safe Browsing Code Mozilla: libwebp: Double-free in libwebp Mozilla: Matrix SDK bundled with Thunderbird vulnerable to denial-of-service attack Thunderbird: Hang when processing certain OpenPGP messages Mozilla: Fullscreen notification obscured Mozilla: Potential Memory Corruption following Garbage Collector compaction Mozilla: Invalid free from JavaScript code Mozilla: Content-Disposition filename truncation leads to Reflected File Download Mozilla: Files with malicious extensions could have been downloaded unsafely on Linux Mozilla: Incorrect optimization result on ARM64 Mozilla: Memory safety bugs fixed in Firefox 112 and Firefox ESR 102.10

UBUNTU-CVE-2023-28427

2026-10-02T15:36:21.447211+00:00

Affected: Ubuntu:20.04:LTS: node-matrix-js-sdk, Ubuntu:22.04:LTS: node-matrix-js-sdk, Ubuntu:24.04:LTS: node-matrix-js-sdk

WID-SEC-W-2023-0789 — Mozilla Thunderbird: Schwachstelle ermöglicht Denial of Service

2026-10-02T15:36:21.447261+00:00

Ein entfernter, anonymer Angreifer kann eine Schwachstelle in Mozilla Thunderbird ausnutzen, um einen Denial of Service Angriff durchzuführen.