6.1

CVE-2026-44889: pylons webob Open Redirect

CVSS: 6.1v3.1MediumAnalyzed
AliasesMGASA-2026-0452SUSE-SU-2026:22370-1SUSE-SU-2026:2982-1
Published 22-06-2026Last modified 23-06-2026
Open JSON

Vulnerability summary

CVE-2026-44889 is a medium (CVSS 6.1) Open Redirect vulnerability in pylons webob. EPSS estimates a 0.27% chance of exploitation in the next 30 days, higher than 17.8% of scored vulnerabilities.

Overall risk
24/100
0100
Low · default modelHow is this calculated?
CVSS score
6.1/10
010
Medium · v3.1 (CVE.org)
EPSS score
0.27%
0%100%
Low · +0.06 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 1 · Related 2
USN-8759-1CGA-673J-G68X-G98X

Timeline

  1. 22-06-2026
    PublishedVulnerability first disclosed.
  2. 23-06-2026
    Last modifiedVulnerability information updated.

Description

WebOb provides objects for HTTP requests and responses. Prior to 1.8.10, the normalization of the HTTP Location header during a redirect is vulnerable to an open redirect: WebOb joins the redirect target to the request URI using Python's urljoin, and since Python 3.10 the underlying urlsplit strips ASCII tab, carriage return, and newline characters before parsing, so a redirect target containing such characters can be reinterpreted as a protocol-relative URL whose authority is an attacker-controlled host. This bypasses the CVE-2024-42353 fix that escaped a leading double slash, allowing an attacker who influences the redirect location to send users to an arbitrary external site instead of the intended one. This vulnerability is fixed in 1.8.10.

CVSS metrics

6 scores · 6 sources · 1 version

EPSS trend

Probability

0.27%

Chance of exploitation in the next 30 days

Percentile

18%

Versus all other CVEs

30-day change

+0.06 pp

From 0.21% on 19-09-2026

19-09-202619-10-2026
EPSS score
0.27%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Suse14 products
  • python-apache-libcloud&distro=SUSE Linux Enterprise Server 16.0< 3.8.0-160000.3.1
  • python-apache-libcloud&distro=SUSE Linux Enterprise Server for SAP applications 16.0< 3.8.0-160000.3.1
  • python-handy-archives&distro=SUSE Linux Enterprise Server 16.0< 0.2.0-160000.3.1
  • python-handy-archives&distro=SUSE Linux Enterprise Server for SAP applications 16.0< 0.2.0-160000.3.1
  • python-Markdown&distro=SUSE Linux Enterprise Server 16.0< 3.8.2-160000.3.1
Opensuse8 products
  • python-apache-libcloud&distro=openSUSE Leap 16.0< 3.8.0-160000.3.1
  • python-handy-archives&distro=openSUSE Leap 16.0< 0.2.0-160000.3.1
  • python-joblib&distro=openSUSE Leap 16.0< 1.5.2-160000.1.1
  • python-Markdown&distro=openSUSE Leap 16.0< 3.8.2-160000.3.1
  • python-PyGithub&distro=openSUSE Leap 16.0< 2.6.1-160000.3.1
Chainguard3 products
  • openstack-tempest-2025.1< 43.0.0-r1
  • openstack-tempest-2025.2< 45.0.0-r1
  • openstack-tempest-2026.1< 46.2.0-r2
Mageia2 products
  • python-webob< 1.8.11-1.mga10
  • python-webob< 1.8.11-1.mga9
Debian1 product
  • python-webobAll versions (No fix recorded) | < 1:1.8.10-0+deb13u1 | < 1:1.8.10-1
Pylons1 product
Pylonsproject1 product
PyPI1 product
  • webob< 1.8.10
Ubuntu1 product
  • python-webob< 1.5.1-1ubuntu0.1~esm2 | < 1:1.7.3-2ubuntu0.1~esm2 | < 1:1.8.5-2ubuntu0.1+esm1 | < 1:1.8.6-1.1ubuntu0.2 | < 1:1.8.7-1ubuntu0.1.24.04.2 | All versions (No fix recorded) | < 1:1.8.9-1ubuntu0.1

9 vendors · 32 products

References

25 links
Show all 25 references