CVE-2017-18361: pylonsproject colander Infinite Loop
CVSS: 7.5v3.0HighModified
AliasesGHSA-rv95-4wxj-6fqqPYSEC-2019-167UBUNTU-CVE-2017-18361openSUSE-SU-2024:14136-1openSUSE-SU-2026:12004-1
Published 01-02-2019Last modified 05-08-2024
Vulnerability summary
CVE-2017-18361 is a high (CVSS 7.5) Infinite Loop vulnerability in pylonsproject colander. EPSS estimates a 2.07% chance of exploitation in the next 30 days, higher than 81.1% of scored vulnerabilities. 1 public exploit is recorded.
CVSS score
7.5/10
010
High · v3.0 (NVD)EPSS score
2.07%
0%100%
Low · +0.29 pp in 30 daysKEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits1github
Timeline
- 01-02-2019PublishedVulnerability first disclosed.
- 05-08-2024Last modifiedVulnerability information updated.
Description
In Pylons Colander through 1.6, the URL validator allows an attacker to potentially cause an infinite loop thereby causing a denial of service via an unclosed parenthesis.
CVSS metrics
5 scores · 3 sources · 3 versionsHigh 8.7Preferred score · OSV · Pypi (Ecosystem advisory) · calculated from vector
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:NSourcesSingle source
High 7.5Preferred score · NVD (NIST)
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:HSourcesAll 3 agree
- OSV · PypiEcosystem advisory · calculated7.5HighCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- OSV · UbuntuEcosystem advisory · calculated7.5HighCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Medium 5.0Preferred score · NVD (NIST)
AV:N/AC:L/Au:N/C:N/I:N/A:PSourcesSingle source
EPSS trend
Probability
2.07%
Chance of exploitation in the next 30 days
Percentile
81%
Versus all other CVEs
30-day change
+0.29 pp
From 1.78% on 20-09-2026
20-09-202620-10-2026
EPSS score2.07%
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
1 foundColander
Maturity: poc
Weaknesses
CWE · root causeAffected systems
Opensuse1 product
- python-colander&distro=openSUSE Tumbleweed< 2.0-1.3 | < 2.0-2.4
Pylonsproject1 product
- colander≤ 1.6
PyPI1 product
- colander< 1.7.0
Ubuntu1 product
- python-colanderAll versions (No fix recorded)
4 vendors · 4 products
References
10 links- github.com/Pylons/colander/issues/290X Refsource MISCExploitIssue TrackingThird Party AdvisoryWEBREPORT
- github.com/Pylons/colanderPACKAGE