genson vulnerable to stack exhaustion

published 2023-06-14 3 y ago modified 2026-06-17 4 mo ago also GHSA-fj64-qprx-q7vq , EUVD-2023-1783

cvss: 7.5; version 3.1, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 0.7%; EPSS 0.7% chance of exploitation in 30 days, percentile 54%
public exploits: 0; none known

An issue was discovered genson thru 1.6 allows attackers to cause a denial of service or other unspecified impacts via crafted object that uses cyclic dependencies.

CISA SSVC

Exploitation: Proof of concept is public
Automatable: yes
Technical impact: partial
Assessed: 22 mo ago (2025-01-03)

Exploit prediction

0.73% chance of exploitation in the next 30 days, higher than 54% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

github.com https://github.com/owlike/genson/issues/191 referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by	version	score	vector
CISA ADP	3.1	7.5	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
NVD	3.1	7.5	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CNA	3.1	7.5	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
GitHub	3.1	7.5	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Affected packages

ecosystem	package	affected	fixed in
maven	com.owlike:genson	<=1.6	no fix listed

Classification

Weakness

CWE-787 Out-of-bounds Write
CWE-400 Uncontrolled Resource Consumption

References

github.com /owlike/genson/issues/191
web, exploit, issue-tracking, third-party-advisory
nvd.nist.gov /vuln/detail/CVE-2023-34617
advisory
github.com /owlike/genson
package

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