Security Fixes and Rewards

Note: Access to bug details and links may be kept restricted until a majority of users are updated with a fix. We will also retain restrictions if the bug exists in a third party library that other projects similarly depend on, but haven’t yet fixed.

This update includes 79 security fixes. Below, we highlight fixes that were contributed by external researchers. Please see the Chrome Security Page for more information.

[$43000][493310462] Critical CVE-2026-8509: Heap buffer overflow in WebML. Reported by c6eed09fc8b174b0f3eebedcceb1e792 on 2026-03-17

[$25000][502636904] Critical CVE-2026-8510: Integer overflow in Skia. Reported by q@calif.io on 2026-04-14

[N/A][495108488] Critical CVE-2026-8511: Use after free in UI. Reported by Google on 2026-03-22

[N/A][495782021] Critical CVE-2026-8512: Use after free in FileSystem. Reported by Google on 2026-03-24

[N/A][495939973] Critical CVE-2026-8513: Use after free in Input. Reported by Google on 2026-03-25

[N/A][495948109] Critical CVE-2026-8514: Use after free in Aura. Reported by Google on 2026-03-25

[N/A][495999127] Critical CVE-2026-8515: Use after free in HID. Reported by Google on 2026-03-25

[N/A][496393078] Critical CVE-2026-8516: Insufficient validation of untrusted input in DataTransfer. Reported by Google on 2026-03-26

[N/A][497531263] Critical CVE-2026-8517: Object lifecycle issue in WebShare. Reported by Google on 2026-03-29

[N/A][497830330] Critical CVE-2026-8518: Use after free in Blink. Reported by Google on 2026-03-30

[N/A][498400132] Critical CVE-2026-8519: Integer overflow in ANGLE. Reported by Google on 2026-04-01

[N/A][503619813] Critical CVE-2026-8520: Race in Payments. Reported by Google on 2026-04-17

[N/A][504106200] Critical CVE-2026-8521: Use after free in Tab Groups. Reported by Google on 2026-04-18

[N/A][504185107] Critical CVE-2026-8522: Use after free in Downloads. Reported by Google on 2026-04-19

[$25000][483956252] High CVE-2026-8523: Use after free in Mojo. Reported by Paul Seekamp / nullenc0de on 2026-02-12

[$10000][503425922] High CVE-2026-8558: Out of bounds write in Fonts. Reported by Matej Smycka on 2026-04-16

[$7000][499565267] High CVE-2026-8524: Out of bounds write in WebAudio. Reported by Brendan Dolan-Gavitt, XBOW on 2026-04-06

[$2000][497928952] High CVE-2026-8525: Heap buffer overflow in ANGLE. Reported by Nathaniel Oh (@calysteon) on 2026-03-30

[TBD][486536241] High CVE-2026-8526: Out of bounds write in WebRTC. Reported by c6eed09fc8b174b0f3eebedcceb1e792 on 2026-02-22

[TBD][486761172] High CVE-2026-8527: Insufficient validation of untrusted input in Downloads. Reported by rachmat.abdul.ro on 2026-02-23

[N/A][490222151] High CVE-2026-8529: Heap buffer overflow in Codecs. Reported by Google on 2026-03-06

[N/A][491930142] High CVE-2026-8530: Use after free in Network. Reported by Google on 2026-03-11

[TBD][492350403] High CVE-2026-8531: Heap buffer overflow in WebML. Reported by Syn4pse on 2026-03-13

[N/A][492812194] High CVE-2026-8532: Integer overflow in XML. Reported by Google on 2026-03-14

[N/A][495247950] High CVE-2026-8533: Use after free in Accessibility. Reported by Google on 2026-03-23

[N/A][495314407] High CVE-2026-8534: Integer overflow in GPU. Reported by Google on 2026-03-23

[N/A][495530312] High CVE-2026-8535: Out of bounds read in Media. Reported by Google on 2026-03-23

[N/A][495857582] High CVE-2026-8536: Insufficient validation of untrusted input in ReadingMode. Reported by Google on 2026-03-24

[N/A][495890000] High CVE-2026-8537: Insufficient policy enforcement in ViewTransitions. Reported by Google on 2026-03-24

[N/A][496415073] High CVE-2026-8538: Insufficient validation of untrusted input in GPU. Reported by Google on 2026-03-26

[TBD][496524586] High CVE-2026-8539: Script injection in SanitizerAPI. Reported by Jungwoo Lee (@physicube) and Wongi Lee (@_qwerty_po) on 2026-03-26

[TBD][496627235] High CVE-2026-8540: Type Confusion in V8. Reported by Google on 2026-03-26

[N/A][496645393] High CVE-2026-8541: Out of bounds read in UI. Reported by Google on 2026-03-26

[N/A][497066659] High CVE-2026-8542: Use after free in Core. Reported by Google on 2026-03-28

[N/A][497095799] High CVE-2026-8543: Out of bounds read in FileSystem. Reported by Google on 2026-03-28

[N/A][497151750] High CVE-2026-8544: Use after free in Media. Reported by Google on 2026-03-28

[N/A][497486030] High CVE-2026-8545: Object corruption in Compositing. Reported by Google on 2026-03-29

[N/A][497531791] High CVE-2026-8546: Out of bounds read in GPU. Reported by Google on 2026-03-29

[N/A][497632199] High CVE-2026-8547: Insufficient policy enforcement in Passwords. Reported by Google on 2026-03-30

[N/A][497821764] High CVE-2026-8548: Out of bounds write in Media. Reported by Google on 2026-03-30

[N/A][497985088] High CVE-2026-8549: Use after free in Media. Reported by Google on 2026-03-31

[N/A][498322453] High CVE-2026-8550: Use after free in Google Lens. Reported by Google on 2026-03-31

[N/A][498376171] High CVE-2026-8551: Use after free in Downloads. Reported by Google on 2026-04-01

[N/A][498706958] High CVE-2026-8552: Heap buffer overflow in GPU. Reported by Google on 2026-04-01

[N/A][498715368] High CVE-2026-8553: Use after free in GPU. Reported by Google on 2026-04-01

[N/A][499131214] High CVE-2026-8554: Type Confusion in ANGLE. Reported by Google on 2026-04-03

[N/A][500033878] High CVE-2026-8555: Use after free in GTK. Reported by Google on 2026-04-06

[N/A][500052361] High CVE-2026-8556: Inappropriate implementation in ANGLE. Reported by Google on 2026-04-06

[N/A][502978647] High CVE-2026-8557: Use after free in Accessibility. Reported by Google on 2026-04-15

[N/A][504629701] High CVE-2026-8559: Integer overflow in Internationalization. Reported by Google on 2026-04-20

[N/A][487795397] Medium CVE-2026-8528: Insufficient validation of untrusted input in SiteIsolation. Reported by Google on 2026-02-26

[TBD][328109821] Medium CVE-2026-8560: Heap buffer overflow in SwiftShader. Reported by Cassidy Kim(@cassidy6564) on 2024-03-05

[TBD][343352552] Medium CVE-2026-8561: Incorrect security UI in Fullscreen. Reported by Wolfgang Ettlinger (aff. Certitude Consulting GmbH)
Alexander Hurbean (aff. Certitude Consulting GmbH) on 2024-05-29

[N/A][40057534] Medium CVE-2026-8562: Side-channel information leakage in Navigation. Reported by Google on 2021-10-06

[TBD][40061220] Medium CVE-2026-8563: Insufficient policy enforcement in IFrame Sandbox. Reported by Luan Herrera (@lbherrera_) on 2022-10-04

[TBD][418273622] Medium CVE-2026-8564: Incorrect security UI in Downloads. Reported by Alesandro Ortiz https://AlesandroOrtiz.com on 2025-05-16

[TBD][442860473] Medium CVE-2026-8565: Inappropriate implementation in Downloads. Reported by Farras Givari on 2025-09-04

[TBD][470646792] Medium CVE-2026-8566: Insufficient policy enforcement in Payments. Reported by Jorian Woltjer on 2025-12-21

[TBD][484986863] Medium CVE-2026-8567: Integer overflow in ANGLE. Reported by cinzinga on 2026-02-16

[TBD][488728570] Medium CVE-2026-8568: Insufficient policy enforcement in AI. Reported by Tianyi Hu on 2026-03-01

[N/A][490229299] Medium CVE-2026-8569: Out of bounds write in Codecs. Reported by Google on 2026-03-06

[N/A][490353576] Medium CVE-2026-8570: Type Confusion in V8. Reported by Google on 2026-03-06

[TBD][491422244] Medium CVE-2026-8571: Insufficient policy enforcement in GPU. Reported by Mark Blaszczyk on 2026-03-10

[N/A][495405493] Medium CVE-2026-8572: Insufficient policy enforcement in Network. Reported by Google on 2026-03-23

[N/A][495417883] Medium CVE-2026-8573: Integer overflow in Codecs. Reported by Google on 2026-03-23

[N/A][495902113] Medium CVE-2026-8574: Use after free in Core. Reported by Google on 2026-03-24

[N/A][496217775] Medium CVE-2026-8575: Use after free in UI. Reported by Google on 2026-03-25

[N/A][496231853] Medium CVE-2026-8576: Inappropriate implementation in CORS. Reported by Google on 2026-03-25

[N/A][496302307] Medium CVE-2026-8577: Integer overflow in Fonts. Reported by Google on 2026-03-25

[N/A][496395450] Medium CVE-2026-8578: Out of bounds read in GPU. Reported by Google on 2026-03-26

[N/A][496526419] Medium CVE-2026-8579: Insufficient validation of untrusted input in Skia. Reported by Google on 2026-03-26

[N/A][496639647] Medium CVE-2026-8580: Use after free in Mojo. Reported by Google on 2026-03-26

[N/A][497292072] Medium CVE-2026-8581: Use after free in GPU. Reported by Google on 2026-03-28

[N/A][497594413] Medium CVE-2026-8582: Object lifecycle issue in Dawn. Reported by Google on 2026-03-30

[N/A][497975477] Medium CVE-2026-8583: Insufficient policy enforcement in WebXR. Reported by Google on 2026-03-31

[N/A][498892595] Medium CVE-2026-8584: Inappropriate implementation in Views. Reported by Google on 2026-04-02

[N/A][499052720] Medium CVE-2026-8585: Inappropriate implementation in Media. Reported by Google on 2026-04-02

[N/A][499154022] Medium CVE-2026-8586: Inappropriate implementation in Chromoting. Reported by Google on 2026-04-03

[TBD][507356235] Medium CVE-2026-8587: Use after free in Extensions. Reported by zh1x1an1221 of Ant Group Tianqiong Security Lab on 2026-04-28

We would also like to thank all security researchers that worked with us during the development cycle to prevent security bugs from ever reaching the stable channel.

Many of our security bugs are detected using AddressSanitizer, MemorySanitizer, UndefinedBehaviorSanitizer, Control Flow Integrity, libFuzzer, or AFL.