Unsafe Pre-Authentication Deserialization In Workers

published 2021-10-25 5 y ago modified 2026-06-17 4 mo ago also GHSA-w729-7633-2fw5 , EUVD-2021-2262

cvss: 9.8; version 3.1, NVD
cisa kev: Not listed; not in CISA's catalog
epss: 64.2%; EPSS 64.2% chance of exploitation in 30 days, percentile 99.2%
public exploits: 0; none known

An Unsafe Deserialization vulnerability exists in the worker services of the Apache Storm supervisor server allowing pre-auth Remote Code Execution (RCE). Apache Storm 2.2.x users should upgrade to version 2.2.1 or 2.3.0. Apache Storm 2.1.x users should upgrade to version 2.1.1. Apache Storm 1.x users should upgrade to version 1.2.4

Patch / fix

fixed in 2

maven org.apache.storm:storm 1.2.4, 2.1.1, 2.2.1
Apache Software Foundation Apache Storm v1.2.4, v2.1.1, v2.2.1, v2.3.0

Exploit prediction

64.18% chance of exploitation in the next 30 days, higher than 99.2% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by	version	score	vector
NVD	3.1	9.8	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
NVD	2.0	7.5	AV:N/AC:L/Au:N/C:P/I:P/A:P
GitHub	3.1	9.8	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected packages

ecosystem	package	affected	fixed in
maven	org.apache.storm:storm	>=2.2.0, <2.2.1 >=1.0.0, <1.2.4 >=2.1.0, <2.1.1	2.2.1 1.2.4 2.1.1

Affected products

Apache Software Foundation Apache Storm

Classification

Weakness

CWE-502 Deserialization of Untrusted Data

References

lists.apache.org /thread.html/r8d45e74299897b6734dd0f788c46a631009ce2eeb731523386f7a253%40%3Cuser.storm.apache.org%3E
web, mailing-list, vendor-advisory
seclists.org /oss-sec/2021/q4/45
web, mailing-list, third-party-advisory
nvd.nist.gov /vuln/detail/CVE-2021-40865
advisory

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

Summary