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  2. After Bitcoin Core 0.14.0 and before Bitcoin Core 29.0, validating a specially-crafted block may cause the node to access previously freed memory.
    During validation, necessary data required for checking inputs for each transaction is pre-calculated and cached. For specially crafted invalid blocks, it was possible for this data to be destroyed while it was still being accessed by a background validation thread. An attacker capable of mining a block with sufficient proof-of-work could have exploited this to crash victim nodes. Because of the nature of use-after-free bugs, it is possible that the crash could have been used for remote code execution, though constraints on the input (block) data make this unlikely.
    This issue is considered High severity.

    Details

    By default, script validation for new blocks is dispatched to background threads via a vector of CScriptCheck functors. Each CScriptCheck holds a pointer to a PrecomputedTransactionData object which stores some data needed by each input in the transaction. Because it stores a pointer and not the data itself, care must be taken to ensure that the PrecomputedTransactionData outlives the CScriptCheck.
    The script checks lifetime is enforced by an RAII class, CCheckQueueControl. However, the control is intantiated before the precomputed transaction data. Because local objects in C++ are destructed in reverse order of construction, this means the vector of PrecomputedTransactionData is destroyed before the CCheckQueueControl.
    This is not an issue when the block is valid, as CCheckQueueControl::Wait() will be called before the function returns and the PrecomputedTransactionData gets destroyed. However, in case of an early return (when a separate check fails) a background script thread may read the precomputed transaction data after it was destroyed. An attacker could exploit this to crash victim nodes at the expense of a valid PoW at tip.

    Attribution

    Cory Fields (MIT DCI) discovered this vulnerability and responsibly disclosed it in a detailed report containing a proof of concept for reproduction and a proposed mitigation.

    Timeline

    • 2024-11-02 Cory Fields privately reports the bug
    • 2024-11-06 Pieter Wuille pushes a covert fix to already open PR #31112 which works around the issue by removing the early returns
    • 2024-12-03 PR #31112 is merged
    • 2025-04-12 Bitcoin Core version 29.0 is released with a fix
    • 2026-04-19 The last vulnerable Bitcoin Core version (28.x) goes end of life
    • 2026-05-05 Public disclosure.

[CVE-2026-2076] [Modified: 29-04-2026] [Analyzed] [V3.1 S6.3:MEDIUM] A weakness has been identified in yeqifu warehouse up to aaf29962ba407d22d991781de28796ee7b4670e4. Affected by this vulnerability is the function addUser/updateUser/deleteUser of the file dataset\repos\warehouse\src\main\java\com\yeqifu\sys\controller\UserController.java of the component User Management Endpoint. This manipulation causes improper authorization. The attack can be initiated remotely. The exploit has been made available to the public and could be used for attacks. Continious delivery with rolling releases is used by this product. Therefore, no version details of affected nor updated releases are available. The project was informed of the problem early through an issue report but has not responded yet.

[CVE-2026-2077] [Modified: 29-04-2026] [Analyzed] [V3.1 S6.3:MEDIUM] A security vulnerability has been detected in yeqifu warehouse up to aaf29962ba407d22d991781de28796ee7b4670e4. Affected by this issue is the function addRole/updateRole/deleteRole of the file dataset\repos\warehouse\src\main\java\com\yeqifu\sys\controller\RoleController.java of the component Role Management Handler. Such manipulation leads to improper authorization. The attack can be launched remotely. The exploit has been disclosed publicly and may be used. This product does not use versioning. This is why information about affected and unaffected releases are unavailable. The project was informed of the problem early through an issue report but has not responded yet.

[CVE-2026-2078] [Modified: 29-04-2026] [Analyzed] [V3.1 S6.3:MEDIUM] A vulnerability was detected in yeqifu warehouse up to aaf29962ba407d22d991781de28796ee7b4670e4. This affects the function addPermission/updatePermission/deletePermission of the file dataset\repos\warehouse\src\main\java\com\yeqifu\sys\controller\PermissionController.java of the component Permission Management. Performing a manipulation results in improper authorization. The attack may be initiated remotely. The exploit is now public and may be used. This product uses a rolling release model to deliver continuous updates. As a result, specific version information for affected or updated releases is not available. The project was informed of the problem early through an issue report but has not responded yet.

[CVE-2026-2079] [Modified: 29-04-2026] [Analyzed] [V3.1 S6.3:MEDIUM] A flaw has been found in yeqifu warehouse up to aaf29962ba407d22d991781de28796ee7b4670e4. This vulnerability affects the function addMenu/updateMenu/deleteMenu of the file dataset\repos\warehouse\src\main\java\com\yeqifu\sys\controller\MenuController.java of the component Menu Management. Executing a manipulation can lead to improper authorization. The attack may be launched remotely. The exploit has been published and may be used. This product operates on a rolling release basis, ensuring continuous delivery. Consequently, there are no version details for either affected or updated releases. The project was informed of the problem early through an issue report but has not responded yet.

[CVE-2026-2080] [Modified: 13-02-2026] [Analyzed] [V3.1 S7.2:HIGH] A vulnerability has been found in UTT HiPER 810 1.7.4-141218. This issue affects the function setSysAdm of the file /goform/formUser. The manipulation of the argument passwd1 leads to command injection. Remote exploitation of the attack is possible. The exploit has been disclosed to the public and may be used. The vendor was contacted early about this disclosure but did not respond in any way.

[CVE-2026-2081] [Modified: 29-04-2026] [Analyzed] [V3.1 S4.7:MEDIUM] A vulnerability was determined in D-Link DIR-823X 250416. The affected element is an unknown function of the file /goform/set_password. This manipulation of the argument http_passwd causes os command injection. The attack is possible to be carried out remotely. The exploit has been publicly disclosed and may be utilized.

[CVE-2026-2082] [Modified: 29-04-2026] [Analyzed] [V3.1 S4.7:MEDIUM] A vulnerability was identified in D-Link DIR-823X 250416. The impacted element is an unknown function of the file /goform/set_mac_clone. Such manipulation of the argument mac leads to os command injection. The attack may be performed from remote. The exploit is publicly available and might be used.

[CVE-2026-2083] [Modified: 29-04-2026] [Analyzed] [V3.1 S7.3:HIGH] A security flaw has been discovered in code-projects Social Networking Site 1.0. This affects an unknown function of the file /delete_post.php. Performing a manipulation of the argument ID results in sql injection. It is possible to initiate the attack remotely. The exploit has been released to the public and may be used for attacks.

[CVE-2026-2084] [Modified: 10-02-2026] [Analyzed] [V3.1 S7.2:HIGH] A weakness has been identified in D-Link DIR-823X 250416. This impacts an unknown function of the file /goform/set_language. Executing a manipulation of the argument langSelection can lead to os command injection. It is possible to launch the attack remotely. The exploit has been made available to the public and could be used for attacks.

[CVE-2026-2085] [Modified: 12-02-2026] [Analyzed] [V3.1 S7.2:HIGH] A security vulnerability has been detected in D-Link DWR-M921 1.1.50. Affected is the function sub_419F20 of the file /boafrm/formUSSDSetup of the component USSD Configuration Endpoint. The manipulation of the argument ussdValue leads to command injection. The attack can be initiated remotely. The exploit has been disclosed publicly and may be used.

[CVE-2026-2086] [Modified: 24-02-2026] [Analyzed] [V3.1 S8.8:HIGH] A vulnerability was detected in UTT HiPER 810G up to 1.7.7-171114. Affected by this vulnerability is the function strcpy of the file /goform/formFireWall of the component Management Interface. The manipulation of the argument GroupName results in buffer overflow. The attack can be launched remotely. The exploit is now public and may be used. The vendor was contacted early about this disclosure but did not respond in any way.

[CVE-2026-2087] [Modified: 29-04-2026] [Analyzed] [V3.1 S7.3:HIGH] A flaw has been found in SourceCodester Online Class Record System 1.0. Affected by this issue is some unknown functionality of the file /admin/login.php. This manipulation of the argument user_email causes sql injection. The attack may be initiated remotely. The exploit has been published and may be used.

[CVE-2026-2088] [Modified: 29-04-2026] [Analyzed] [V3.1 S7.3:HIGH] A vulnerability has been found in PHPGurukul Beauty Parlour Management System 1.1. This affects an unknown part of the file /admin/accepted-appointment.php. Such manipulation of the argument delid leads to sql injection. The attack may be launched remotely. The exploit has been disclosed to the public and may be used.

[CVE-2026-2089] [Modified: 29-04-2026] [Analyzed] [V3.1 S7.3:HIGH] A vulnerability was found in SourceCodester Online Class Record System 1.0. This vulnerability affects unknown code of the file /admin/subject/controller.php. Performing a manipulation of the argument ID results in sql injection. Remote exploitation of the attack is possible. The exploit has been made public and could be used.

[CVE-2026-2090] [Modified: 29-04-2026] [Analyzed] [V3.1 S7.3:HIGH] A vulnerability was determined in SourceCodester Online Class Record System 1.0. This issue affects some unknown processing of the file /admin/message/search.php. Executing a manipulation of the argument term can lead to sql injection. The attack can be executed remotely. The exploit has been publicly disclosed and may be utilized.

[CVE-2026-2105] [Modified: 29-04-2026] [Analyzed] [V3.1 S6.3:MEDIUM] A flaw has been found in yeqifu warehouse up to aaf29962ba407d22d991781de28796ee7b4670e4. The affected element is the function addDept/updateDept/deleteDept of the file dataset\repos\warehouse\src\main\java\com\yeqifu\sys\controller\DeptController.java of the component Department Management. Executing a manipulation can lead to improper authorization. It is possible to launch the attack remotely. The exploit has been published and may be used. This product takes the approach of rolling releases to provide continious delivery. Therefore, version details for affected and updated releases are not available. The project was informed of the problem early through an issue report but has not responded yet.

[CVE-2026-2106] [Modified: 29-04-2026] [Analyzed] [V3.1 S6.3:MEDIUM] A vulnerability has been found in yeqifu warehouse up to aaf29962ba407d22d991781de28796ee7b4670e4. The impacted element is the function addNotice/updateNotice/deleteNotice/batchDeleteNotice of the file dataset\repos\warehouse\src\main\java\com\yeqifu\sys\controller\NoticeController.java of the component Notice Management. The manipulation leads to improper authorization. The attack can be initiated remotely. The exploit has been disclosed to the public and may be used. Continious delivery with rolling releases is used by this product. Therefore, no version details of affected nor updated releases are available. The project was informed of the problem early through an issue report but has not responded yet.

[CVE-2026-2107] [Modified: 29-04-2026] [Analyzed] [V3.1 S6.3:MEDIUM] A vulnerability was found in yeqifu warehouse up to aaf29962ba407d22d991781de28796ee7b4670e4. This affects the function loadAllLoginfo/deleteLoginfo/batchDeleteLoginfo of the file dataset\repos\warehouse\src\main\java\com\yeqifu\sys\controller\LoginfoController.java of the component Log Info Handler. The manipulation results in improper authorization. The attack can be launched remotely. The exploit has been made public and could be used. This product does not use versioning. This is why information about affected and unaffected releases are unavailable. The project was informed of the problem early through an issue report but has not responded yet.

[CVE-2026-2108] [Modified: 27-02-2026] [Analyzed] [V3.1 S5.3:MEDIUM] A vulnerability was determined in jsbroks COCO Annotator up to 0.11.1. This impacts an unknown function of the file /api/info/long_task of the component Endpoint. This manipulation causes denial of service. The attack may be initiated remotely. The exploit has been publicly disclosed and may be utilized. The vendor was contacted early about this disclosure but did not respond in any way.

[CVE-2026-2109] [Modified: 29-04-2026] [Analyzed] [V3.1 S5.4:MEDIUM] A vulnerability was identified in jsbroks COCO Annotator up to 0.11.1. Affected is an unknown function of the file /api/undo/ of the component Delete Category Handler. Such manipulation of the argument ID leads to improper authorization. The attack may be launched remotely. The exploit is publicly available and might be used. The vendor was contacted early about this disclosure but did not respond in any way.