PatchTheCVE: immerhttps://patchthecve.com/CVEs with upgrade or downgrade fix stepsCVE-2021-3757: immer is vulnerable to Improperly Controlled Modification of Object Prototype Attributes ('Prototype Pollutionhttps://patchthecve.com/cve/CVE-2021-3757.htmlhttps://patchthecve.com/cve/CVE-2021-3757.htmlWed, 17 Jun 2026 04:05:42 +0000CRITICAL 9.8: immer is vulnerable to Improperly Controlled Modification of Object Prototype Attributes ('Prototype Pollution')CVE-2021-23436: This affects the package immer before 9.0.6https://patchthecve.com/cve/CVE-2021-23436.htmlhttps://patchthecve.com/cve/CVE-2021-23436.htmlWed, 17 Jun 2026 03:38:45 +0000MEDIUM 5.6: This affects the package immer before 9.0.6. A type confusion vulnerability can lead to a bypass of CVE-2020-28477 when the user-provided keys used in the path parameter are arrays. In particular, this bypass is possible because the condition (p === "__proto__" || p === "constructor") in applyPatcheCVE-2020-28477: This affects all versions of package immer.https://patchthecve.com/cve/CVE-2020-28477.htmlhttps://patchthecve.com/cve/CVE-2020-28477.htmlWed, 17 Jun 2026 03:10:30 +0000HIGH 7.5: This affects all versions of package immer.