handcraftedinthealps goodby-csv Potential Gadget Chain allowing Remote Code Execution

published 2025-06-13 16 mo ago modified 2026-06-17 4 mo ago also GHSA-x3c7-22c8-prg7 , EUVD-2025-18300

cvss: 3.9; version 3.1, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 0.2%; EPSS 0.2% chance of exploitation in 30 days, percentile 16%
public exploits: 0; none known

handcraftedinthealps goodby-csv is a highly memory efficient, flexible and extendable open-source CSV import/export library. Prior to 1.4.3, goodby-csv could be used as part of a chain of methods that is exploitable when an insecure deserialization vulnerability exists in an application. This so-called "gadget chain" presents no direct threat but is a vector that can be used to achieve remote code execution if the application deserializes untrusted data due to another vulnerability. The problem is patched with Version 1.4.3.

Patch / fix

fixed in 1 links 1

packagist handcraftedinthealps/goodby-csv 1.4.3

github.com/handcraftedinthealps/goodby-csv@acd14c6 commit

CISA SSVC

Exploitation: none
Automatable: no
Technical impact: partial
Assessed: 16 mo ago (2025-06-13)

Exploit prediction

0.25% chance of exploitation in the next 30 days, higher than 16% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by	version	score	vector
CNA	3.1	3.9	CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:L/I:L/A:L
GitHub	3.1	3.9	CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:L/I:L/A:L

Affected packages

ecosystem	package	affected	fixed in
packagist	handcraftedinthealps/goodby-csv	<1.4.3	1.4.3

Affected products

handcraftedinthealps goodby-csv

Classification

Weakness

CWE-915 Improperly Controlled Modification of Dynamically-Determined Object Attributes

References

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