CVE Explorer
CVE-2026-59880
Immutable.js provides many Persistent Immutable data structures. Prior to 4.3.9 and 5.1.8, Immutable.Map and Immutable.Set keep keys that share the same 32-bit hash in a HashCollisionNode collision bucket that is scanned linearly, allowing an attacker who controls keys inserted into a Map, such as through Immutable.Map(obj), Immutable.fromJS(obj), state.merge(userObject), or mergeDeep, to craft many colliding keys and degrade insertion and lookup to consume disproportionate CPU. This issue is fi
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
0
Affected products and versions
1 source assertion{"product":"immutable-js","vendor":"immutable-js","versions":[{"status":"affected","version":"< 4.3.9"},{"status":"affected","version":">= 5.0.0-beta.1, < 5.1.8"}]}
- cve_program_cvelist_v5affectedurn:baitaphish:normalized-source-record:v2:4e2e594b85c112ae9599c87f6a4312847a1db97b6fc5c7cab700607243131a6e · sha256:af21f6cd85595123… · /containers/cna/affected/0
Provider-owned CVSS observations
1 source assertion{"metric":{"attackComplexity":"LOW","attackRequirements":"NONE","attackVector":"NETWORK","baseScore":8.7,"baseSeverity":"HIGH","privilegesRequired":"NONE","subAvailabilityImpact":"NONE","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","userInteraction":"NONE","vectorString":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N","version":"4.0","vulnAvailabilityImpact":"HIGH","vulnConfidentialityImpact":"NONE","vulnIntegrityImpact":"NONE"},"metric_type":"cvssV4_0"}
- cve_program_cvelist_v5cvssurn:baitaphish:normalized-source-record:v2:4e2e594b85c112ae9599c87f6a4312847a1db97b6fc5c7cab700607243131a6e · sha256:af21f6cd85595123… · /containers/cna/metrics/0/cvssV4_0
CWE assertions
1 source assertion{"cweId":"CWE-407","description":"CWE-407: Inefficient Algorithmic Complexity","lang":"en","type":"CWE"}
- cve_program_cvelist_v5cweurn:baitaphish:normalized-source-record:v2:4e2e594b85c112ae9599c87f6a4312847a1db97b6fc5c7cab700607243131a6e · sha256:af21f6cd85595123… · /containers/cna/problemTypes/0/descriptions/0
Source references
6 source assertions{"name":"https://github.com/immutable-js/immutable-js/commit/3dd7e5655012597a41873e328bf9142a8901527b","tags":["x_refsource_MISC"],"url":"https://github.com/immutable-js/immutable-js/commit/3dd7e5655012597a41873e328bf9142a8901527b"}
- cve_program_cvelist_v5referenceurn:baitaphish:normalized-source-record:v2:4e2e594b85c112ae9599c87f6a4312847a1db97b6fc5c7cab700607243131a6e · sha256:af21f6cd85595123… · /containers/cna/references/1
{"name":"https://github.com/immutable-js/immutable-js/commit/e51d49fc612ded5ec4dfb94ff294d22074269b0f","tags":["x_refsource_MISC"],"url":"https://github.com/immutable-js/immutable-js/commit/e51d49fc612ded5ec4dfb94ff294d22074269b0f"}
- cve_program_cvelist_v5referenceurn:baitaphish:normalized-source-record:v2:4e2e594b85c112ae9599c87f6a4312847a1db97b6fc5c7cab700607243131a6e · sha256:af21f6cd85595123… · /containers/cna/references/2
{"name":"https://github.com/immutable-js/immutable-js/releases/tag/v4.3.9","tags":["x_refsource_MISC"],"url":"https://github.com/immutable-js/immutable-js/releases/tag/v4.3.9"}
- cve_program_cvelist_v5referenceurn:baitaphish:normalized-source-record:v2:4e2e594b85c112ae9599c87f6a4312847a1db97b6fc5c7cab700607243131a6e · sha256:af21f6cd85595123… · /containers/cna/references/3
{"name":"https://github.com/immutable-js/immutable-js/releases/tag/v5.1.8","tags":["x_refsource_MISC"],"url":"https://github.com/immutable-js/immutable-js/releases/tag/v5.1.8"}
- cve_program_cvelist_v5referenceurn:baitaphish:normalized-source-record:v2:4e2e594b85c112ae9599c87f6a4312847a1db97b6fc5c7cab700607243131a6e · sha256:af21f6cd85595123… · /containers/cna/references/4
{"tags":["exploit"],"url":"https://github.com/immutable-js/immutable-js/security/advisories/GHSA-xvcm-6775-5m9r"}
- cve_program_cvelist_v5referenceurn:baitaphish:normalized-source-record:v2:4e2e594b85c112ae9599c87f6a4312847a1db97b6fc5c7cab700607243131a6e · sha256:af21f6cd85595123… · /containers/adp/0/references/0
{"name":"https://github.com/immutable-js/immutable-js/security/advisories/GHSA-xvcm-6775-5m9r","tags":["x_refsource_CONFIRM"],"url":"https://github.com/immutable-js/immutable-js/security/advisories/GHSA-xvcm-6775-5m9r"}
- cve_program_cvelist_v5referenceurn:baitaphish:normalized-source-record:v2:4e2e594b85c112ae9599c87f6a4312847a1db97b6fc5c7cab700607243131a6e · sha256:af21f6cd85595123… · /containers/cna/references/0
Attribution and limitations
- CVE Program CVEList V5: Reproduce the MITRE copyright designation and CVE license in copies. Source →
Provider severity values are preserved separately. Baitaphish does not convert them into a risk rating, infer affected products, or treat EPSS as observed exploitation.