Koji: escape html tag characters in the query string

published 2024-12-24 22 mo ago modified 2026-07-07 4 mo ago also GHSA-g2vg-8hfg-79vj , PYSEC-2026-1501 , EUVD-2024-3582

cvss: 5.4; version 3.1, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 0.3%; EPSS 0.3% chance of exploitation in 30 days, percentile 21%
public exploits: 0; none known

A vulnerability in Koji was found. An unsanitized input allows for an XSS attack. Javascript code from a malicious link could be reflected in the resulting web page. It is not expected to be able to submit an action or make a change in Koji due to existing XSS protections in the code

Patch / fix

fixed in 1

pypi koji 1.33.2, 1.34.3, 1.35.1

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2024-9427 updated 2025-11-21 cvss 5.4

koji: Escape HTML tag characters in the query string

Red Hat All currently supported Red Hat products
not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation: none
Automatable: no
Technical impact: partial
Assessed: 22 mo ago (2024-12-24)

Exploit prediction

0.29% chance of exploitation in the next 30 days, higher than 21% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by	version	score	vector
CNA	3.1	5.4	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N
GitHub	3.1	5.4	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N
OSV	3.1	5.4	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N

Affected packages

ecosystem	package	affected	fixed in
pypi	koji	>=1.35.0, <1.35.1 >=1.34.0, <1.34.3 <1.33.2	1.35.1 1.34.3 1.33.2

Classification

Weakness

CWE-116 Improper Encoding or Escaping of Output

References

access.redhat.com /security/cve/CVE-2024-9427
vdb-entry, web
bugzilla.redhat.com /show_bug.cgi?id=2316047
issue-tracking, web
nvd.nist.gov /vuln/detail/CVE-2024-9427
advisory
docs.pagure.org /koji/CVEs/CVE-2024-9427
web
pagure.io /koji
package
pagure.io /koji/c/8c72d90d7bb991f8fb193851b80847ac9e9474a4?branch=master
web
pypi.org /project/koji
package
github.com /advisories/GHSA-g2vg-8hfg-79vj
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