Mozilla
Security Vulnerabilities fixed in Thunderbird 159
MFSA2026-121 Oct 27, 2026 Source: Vendor
Imported from Mozilla security advisory MFSA2026-121. Draft.
Source of record
The credited names below are quoted verbatim from the vendor's own advisory:
https://www.mozilla.org/en-US/security/advisories/mfsa2026-121/
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Credited
173 lines
Showing 1–50 of 173 matching , page 1 of 4 , clear filters
CVE-2026-118174
BR2026-0000-036655
unclaimed
High: Displaying a message could load an attacker-chosen URL through an OpenPGP key attachment
Credited as Magnus Melin
CVE-2026-118175
BR2026-0000-036656
unclaimed
High: Content of other messages could be included when replying to a crafted message
Credited as YuYoung Sung
CVE-2026-118176
BR2026-0000-036657
unclaimed
High: Bypass of remote UNC path restriction in mailbox: URLs
Credited as YuYoung Sung
CVE-2026-118177
BR2026-0000-036658
unclaimed
High: Calendar discovery accepted local file and remote network share locations
Credited as Magnus Melin
CVE-2026-118178
BR2026-0000-036659
unclaimed
High: RSS feed could redirect its subscription to a local file or network share
Credited as KhalidAlharthi
CVE-2026-118179
BR2026-0000-036660
unclaimed
Moderate: Request forgery via news: links
Credited as Nguyen Tuan Hung
CVE-2026-118180
BR2026-0000-036661
unclaimed
Moderate: Matrix homeserver could redirect the chat session to a local file or network share
Credited as Magnus Melin
CVE-2026-117860
BR2026-0000-036662
unclaimed
High: Same-origin policy bypass in the DOM: Navigation component
Credited as satyamasd
CVE-2026-117861
BR2026-0000-036663
unclaimed
High: Sandbox escape in the DOM: Navigation component
Credited as Mozilla
CVE-2026-117862
BR2026-0000-036664
unclaimed
High: Privilege escalation due to incorrect boundary conditions in the Networking component
Credited as Mozilla
CVE-2026-117863
BR2026-0000-036665
unclaimed
High: Information disclosure due to uninitialized memory in the Audio/Video component
Credited as Mozilla
CVE-2026-117864
BR2026-0000-036666
unclaimed
High: Sandbox escape in the Form Manager component
Credited as Mozilla
CVE-2026-117865
BR2026-0000-036667
unclaimed
High: Use-after-free in the JavaScript: GC component
Credited as Mozilla
CVE-2026-117866
BR2026-0000-036668
unclaimed
High: Privilege escalation due to use-after-free in the Graphics: Canvas2D component
Credited as Mozilla
CVE-2026-117867
BR2026-0000-036669
unclaimed
High: Use-after-free in the Layout component
Credited as Mozilla
CVE-2026-117868
BR2026-0000-036670
unclaimed
High: Sandbox escape in the DOM: Networking component
Credited as Yaqoub Aldurayhim
CVE-2026-117869
BR2026-0000-036671
unclaimed
High: Use-after-free in the DOM: Core & HTML component
Credited as Mozilla
CVE-2026-117870
BR2026-0000-036672
unclaimed
High: Use-after-free in the JavaScript Engine component
Credited as Mozilla
CVE-2026-117871
BR2026-0000-036673
unclaimed
High: Invalid pointer in the Graphics component
Credited as Mozilla
CVE-2026-117872
BR2026-0000-036674
unclaimed
High: Use-after-free in the JavaScript: Standard Library component
Credited as Mozilla
CVE-2026-117873
BR2026-0000-036675
unclaimed
High: Incorrect boundary conditions in the Audio/Video: Playback component
Credited as Mozilla
CVE-2026-118005
BR2026-0000-036676
unclaimed
High: Use-after-free in the WebRTC: Signaling component
Credited as Mozilla
CVE-2026-117874
BR2026-0000-036677
unclaimed
High: Use-after-free in the Internationalization component
Credited as Mozilla
CVE-2026-117875
BR2026-0000-036678
unclaimed
High: Use-after-free in the Layout: Scrolling and Overflow component
Credited as Mozilla
CVE-2026-117876
BR2026-0000-036679
unclaimed
High: Use-after-free in the Layout: Text and Fonts component
Credited as Amy Burnett of OpenAI
CVE-2026-118006
BR2026-0000-036680
unclaimed
High: Privilege escalation due to use-after-free in the WebRTC: Signaling component
Credited as Mozilla
CVE-2026-117877
BR2026-0000-036681
unclaimed
High: Use-after-free in the Layout: Text and Fonts component
Credited as Mozilla
CVE-2026-118007
BR2026-0000-036682
unclaimed
High: Use-after-free in the JavaScript: GC component
Credited as Mozilla
CVE-2026-117878
BR2026-0000-036683
unclaimed
High: Other issue, use-after-free in the Storage: IndexedDB component
Credited as Amy Burnett of OpenAI
CVE-2026-117879
BR2026-0000-036684
unclaimed
High: Incorrect boundary conditions in the Layout: Tables component
Credited as Amy Burnett of OpenAI
CVE-2026-118008
BR2026-0000-036685
unclaimed
High: Privilege escalation in the DOM: Navigation component
Credited as Amy Burnett of OpenAI
CVE-2026-117880
BR2026-0000-036686
unclaimed
High: Use-after-free in the XML component
Credited as Mozilla
CVE-2026-118009
BR2026-0000-036687
unclaimed
High: Integer overflow, use-after-free in the Graphics: Text component
Credited as Nguyen Thanh Nguyen
CVE-2026-117881
BR2026-0000-036688
unclaimed
High: Use-after-free in the DOM: Core & HTML component
Credited as Amy Burnett of OpenAI
CVE-2026-117882
BR2026-0000-036689
unclaimed
High: Use-after-free in the Layout component
Credited as Amy Burnett of OpenAI
CVE-2026-117883
BR2026-0000-036690
unclaimed
High: Use-after-free in the DOM: HTML Parser component
Credited as Amy Burnett of OpenAI
CVE-2026-117884
BR2026-0000-036691
unclaimed
High: Use-after-free in the Networking component
Credited as Mozilla
CVE-2026-117885
BR2026-0000-036692
unclaimed
High: Use-after-free in the Layout: Grid component
Credited as Mozilla
CVE-2026-117886
BR2026-0000-036693
unclaimed
High: Incorrect boundary conditions in the Graphics: Text component
Credited as tsui
CVE-2026-117887
BR2026-0000-036694
unclaimed
High: Use-after-free in the DOM: Core & HTML component
Credited as Mozilla
CVE-2026-118010
BR2026-0000-036695
unclaimed
High: Use-after-free in the Disability Access APIs component
Credited as Mozilla
CVE-2026-117888
BR2026-0000-036696
unclaimed
High: Uninitialized memory in the Graphics: Canvas2D component
Credited as Minseong Kim
CVE-2026-117889
BR2026-0000-036697
unclaimed
High: Incorrect boundary conditions in the JavaScript Engine component
Credited as Mozilla
CVE-2026-117890
BR2026-0000-036698
unclaimed
High: JIT miscompilation in the JavaScript Engine: JIT component
Credited as Mozilla
CVE-2026-117891
BR2026-0000-036699
unclaimed
High: Use-after-free in the JavaScript Engine: JIT component
Credited as Mozilla
CVE-2026-117892
BR2026-0000-036700
unclaimed
High: Privilege escalation due to use-after-free in the WebRTC: Networking component
Credited as Mozilla
CVE-2026-117893
BR2026-0000-036701
unclaimed
High: Incorrect boundary conditions in the Security: PSM component
Credited as Mozilla
CVE-2026-117894
BR2026-0000-036702
unclaimed
High: Incorrect boundary conditions in the WebRTC: Signaling component
Credited as Mozilla
CVE-2026-117895
BR2026-0000-036703
unclaimed
High: Use-after-free in the DOM: Core & HTML component
Credited as Mozilla
CVE-2026-117896
BR2026-0000-036704
unclaimed
High: Use-after-free in the DOM: Core & HTML component
Credited as Mozilla