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Fencer Intel
medium 6.8

CVE-2015-2296 json

Python Requests Session Fixation

published 2015-03-18 11 y ago modified 2026-06-17 4 mo ago also GHSA-pg2w-x9wp-vw92 , PYSEC-2015-17 , EUVD-2015-0032

cvss
6.8
version 2.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
3.2%
EPSS 3.2% chance of exploitation in 30 days, percentile 88%
public exploits
0
none known

Summary

The resolve_redirects function in sessions.py in requests 2.1.0 through 2.5.3 allows remote attackers to conduct session fixation attacks via a cookie without a host value in a redirect.

Patch / fix

  • pypi requests 2.6.0
  • requests Debian 14, Debian 13, Debian 12 2.4.3-6

debian advisories DEBIAN-CVE-2015-2296

  • requests Ubuntu 14.04 LTS 2.2.1-1ubuntu0.2

ubuntu advisories UBUNTU-CVE-2015-2296

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • python39-setuptools SLE Module for Basesystem 15 SP3 44.1.1-7.3.1
  • python39-pip SLE Module for Basesystem 15 SP3 20.2.4-7.5.1
  • python3-requests SLES for SAP 12 SP5, SLES for SAP 12 SP4, SLES for SAP 12 SP3 +16 more 2.20.1-5.2
  • python-certifi SLES for SAP 12 SP5, SLES for SAP 12 SP4, SLES for SAP 12 SP3 +17 more 2018.4.16-3.6.1
  • python-chardet SLES for SAP 12 SP5, SLES for SAP 12 SP4, SLES for SAP 12 SP3 +17 more 3.0.4-5.6.1
  • python-urllib3 SLES for SAP 12 SP5, SLES for SAP 12 SP4, SLES for SAP 12 SP3 +17 more 1.22-3.20.1
  • python-pip SLE Module for Public Cloud 12, OpenStack Cloud 7 10.0.1-11.6.1
  • python-ply SLES for SAP 12 SP4, SLES 12 SP4, SLED 12 SP4 +2 more 3.4-3.3.1

suse advisories SUSE-FU-2021:2130-1SUSE-SU-2020:1792-1SUSE-RU-2019:2505-1SUSE-SU-2016:0114-1SUSE-SU-2015:2156-1

  • python-requests openSUSE Tumbleweed 2.34.2-1.2
  • python-pip openSUSE Tumbleweed 9.0.1-1.1
  • python-requests openSUSE Tumbleweed 2.11.1-1.1
  • python2-pip openSUSE Tumbleweed 20.0.2-2.6

opensuse advisories openSUSE-SU-2026:12038-1openSUSE-SU-2024:10098-1openSUSE-SU-2024:10125-1openSUSE-SU-2024:11281-1

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-2015-2296 updated cvss 4.3

python-requests: session fixation and cookie stealing vulnerability

  • Red Hat Enterprise Linux OpenStack Platform 6 (Juno) python-requests Red Hat Enterprise Linux OpenStack Platform 6 (Juno) Installer python-requests
    affected: no fix available “Fix deferred”
  • Red Hat Satellite 6 python-requests, python3-requests
    affected: no fix planned “Will not fix”
  • Red Hat Ceph Storage 1.2 python-requests Red Hat Ceph Storage 1.3 python-requests Red Hat Enterprise Linux 7 python-requests Red Hat Enterprise Linux OpenStack Platform 5 (Icehouse) python-requests Red Hat OpenStack Platform 4 python-requests Red Hat Storage 2 python-requests
    +1 more products
    Red Hat Storage 3 python-requests, python2-requests
    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

Exploit prediction

3.16% chance of exploitation in the next 30 days, higher than 88% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by version score vector
NVD 2.0 6.8 AV:N/AC:M/Au:N/C:P/I:P/A:P

Affected packages

ecosystem package affected fixed in
pypi requests
>=2.1.0, <2.6.0
2.6.0

References

Sources

Fencer Intel 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.