CVE-2017-18361
Pylons Colander Denial of Service vulnerability
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.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- None
- User interaction
- None
What an attacker can affect
- Confidentiality
- None
- Integrity
- None
- Availability
- High
Exploit likelihood
What each source reports
NVD Score used
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.
- Record
CVE-2017-18361- CVSS 3.0
- 7.5 High
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - CVSS 2.0
- 5.0 Medium
AV:N/AC:L/Au:N/C:N/I:N/A:P - Weakness
- CWE-835
- Updated
- 2026-11-02
CVE List No score
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.
- Record
CVE-2017-18361- Updated
- 2026-11-02
EUVDEUVD-2019-0030 No score
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.
- Record
EUVD-2019-0030- Updated
- 2026-11-03
GitHub AdvisoriesGHSA-rv95-4wxj-6fqq
Pylons Colander Denial of Service vulnerability
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.
- Record
GHSA-rv95-4wxj-6fqq- CVSS 4.0
- 8.7 High
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N - CVSS 3.0
- 7.5 High
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - Weakness
- CWE-835
- Updated
- 2026-11-02
OSV
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.
- Record
CVE-2017-18361- CVSS 3.0
- 7.5 High
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - Updated
- 2026-11-02
OSVGHSA-rv95-4wxj-6fqq
Pylons Colander Denial of Service vulnerability
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.
- Record
GHSA-rv95-4wxj-6fqq- CVSS 4.0
- 8.7 High
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N - CVSS 3.0
- 7.5 High
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - Weakness
- CWE-835
- Updated
- 2026-11-02
Show 5 moreShow less
OSVUBUNTU-CVE-2017-18361
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.
- Record
UBUNTU-CVE-2017-18361- CVSS 3.0
- 7.5 High
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - Updated
- 2026-11-02
OSVopenSUSE-SU-2024:11222-1 No score
python36-colander-1.7.0-5.6 on GA media
These are all security issues fixed in the python36-colander-1.7.0-5.6 package on the GA media of openSUSE Tumbleweed.
- Record
openSUSE-SU-2024:11222-1- Updated
- 2026-11-02
OSVopenSUSE-SU-2024:14136-1 No score
python310-colander-2.0-1.3 on GA media
These are all security issues fixed in the python310-colander-2.0-1.3 package on the GA media of openSUSE Tumbleweed.
- Record
openSUSE-SU-2024:14136-1- Updated
- 2026-11-02
OSVopenSUSE-SU-2026:12004-1 No score
python313-colander-2.0-2.4 on GA media
These are all security issues fixed in the python313-colander-2.0-2.4 package on the GA media of openSUSE Tumbleweed.
- Record
openSUSE-SU-2026:12004-1- Updated
- 2026-11-02
OSVPYSEC-2019-167 No score
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.
- Record
PYSEC-2019-167- Updated
- 2026-11-02
Affected products
Affected packages
| Package | Affected | Fixed |
|---|---|---|
colanderPyPI |
before 1.7.0 | 1.7.0 |
colanderPyPI |
before 1.7.0, plus listed versions 0.10.20.30.40.5 Show 37 moreShow less0.5.10.5.20.6.00.6.10.6.20.7.00.7.10.7.20.7.30.80.90.9.10.9.20.9.30.9.40.9.50.9.60.9.70.9.80.9.91.01.0a11.0a21.0a31.0a41.0a51.0b11.11.21.31.3.11.3.21.3.31.41.51.5.11.6.0 |
1.7.0 |
python-colanderUbuntu:16.04:LTS |
All versions, plus listed versions 1.0b1-3 |
None known |
python-colanderopenSUSE:Tumbleweed |
before 2.0-1.3 | 2.0-1.3 |
python-colanderopenSUSE:Tumbleweed |
before 2.0-2.4 | 2.0-2.4 |
History
| Recorded | Changed | Sources |
|---|---|---|
| aliases | EUVD | |
| first indexed | CVE List, GitHub Advisories, NVD, OSV |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2017-18361 is a high vulnerability (CVSS 7.5) in Pylonsproject Colander, published February 1, 2019. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 2.07%, the 81st percentile. Fixed in colander 1.7.0.
References
github.com/Pylons/colander/pull/323
nvd.nist.gov/vuln/detail/CVE-2017-18361