CVE Explorer

CVE-2026-31234

Horovod thru 0.28.1 contains an insecure deserialization vulnerability (CWE-502) in its KVStore HTTP server component. The KVStore server, used for distributed task coordination, lacks authentication and authorization controls, allowing any remote attacker to write arbitrary data via HTTP PUT requests. When a Horovod worker reads data from the KVStore (via HTTP GET), it deserializes the data using cloudpickle.loads() without verifying its source or integrity. An attacker can exploit this by send

Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:5297db9069c0946dd7dfd2c6c41a87b9b4456eb3b59157e15bd927543c1d8e9e

Known exploited

Not asserted

Disputed

Stale source

Conflicts

Preserved source conflicts

No provider value was silently selected as the winner.

cwe · 2 assertions

{"description":"n/a","lang":"en","type":"text"}

cve_program_cvelist_v5cwe
urn:baitaphish:normalized-source-record:v2:f0467541c583adcc1852cb0bbe20537aa63ff14b68c96a2c97a10cd0c3159689 · sha256:bbce7e017cd22135… · /containers/cna/problemTypes/0/descriptions/0

{"cweId":"CWE-502","description":"CWE-502 Deserialization of Untrusted Data","lang":"en","type":"CWE"}

cve_program_cvelist_v5cwe
urn:baitaphish:normalized-source-record:v2:f0467541c583adcc1852cb0bbe20537aa63ff14b68c96a2c97a10cd0c3159689 · sha256:bbce7e017cd22135… · /containers/adp/0/problemTypes/0/descriptions/0

Affected products and versions

1 source assertion

{"product":"n/a","vendor":"n/a","versions":[{"status":"affected","version":"n/a"}]}

cve_program_cvelist_v5affected
urn:baitaphish:normalized-source-record:v2:f0467541c583adcc1852cb0bbe20537aa63ff14b68c96a2c97a10cd0c3159689 · sha256:bbce7e017cd22135… · /containers/cna/affected/0

Provider-owned CVSS observations

1 source assertion

{"metric":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"HIGH","baseScore":9.8,"baseSeverity":"CRITICAL","confidentialityImpact":"HIGH","integrityImpact":"HIGH","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","version":"3.1"},"metric_type":"cvssV3_1"}

cve_program_cvelist_v5cvss
urn:baitaphish:normalized-source-record:v2:f0467541c583adcc1852cb0bbe20537aa63ff14b68c96a2c97a10cd0c3159689 · sha256:bbce7e017cd22135… · /containers/adp/0/metrics/0/cvssV3_1

CWE assertions

2 source assertions

{"description":"n/a","lang":"en","type":"text"}

cve_program_cvelist_v5cwe
urn:baitaphish:normalized-source-record:v2:f0467541c583adcc1852cb0bbe20537aa63ff14b68c96a2c97a10cd0c3159689 · sha256:bbce7e017cd22135… · /containers/cna/problemTypes/0/descriptions/0

{"cweId":"CWE-502","description":"CWE-502 Deserialization of Untrusted Data","lang":"en","type":"CWE"}

cve_program_cvelist_v5cwe
urn:baitaphish:normalized-source-record:v2:f0467541c583adcc1852cb0bbe20537aa63ff14b68c96a2c97a10cd0c3159689 · sha256:bbce7e017cd22135… · /containers/adp/0/problemTypes/0/descriptions/0

Source references

2 source assertions

{"url":"https://github.com/horovod/horovod"}

cve_program_cvelist_v5reference
urn:baitaphish:normalized-source-record:v2:f0467541c583adcc1852cb0bbe20537aa63ff14b68c96a2c97a10cd0c3159689 · sha256:bbce7e017cd22135… · /containers/cna/references/0

{"url":"https://www.notion.so/CVE-2026-31234-35d1e139318881d585cde508b9d2453c"}

cve_program_cvelist_v5reference
urn:baitaphish:normalized-source-record:v2:f0467541c583adcc1852cb0bbe20537aa63ff14b68c96a2c97a10cd0c3159689 · sha256:bbce7e017cd22135… · /containers/cna/references/1

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.

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