python-pysaml2: Vulnerable to XML external entity attack
Published Mar 3, 2017
9.4
CRITICALCVSS 4.0
EPSS 2.13%
Description
PySAML2 allows remote attackers to conduct XML external entity (XXE) attacks via a crafted SAML XML request or response.
Affected products
No data.
- n/a
No data.
Red Hat Enterprise Linux OpenStack Platform 7 (Kilo)
python-pysaml2
Not affected
Red Hat OpenStack Platform 10 (Newton)
python-pysaml2
Not affected
Red Hat OpenStack Platform 11 (Ocata)
python-pysaml2
Not affected
Red Hat OpenStack Platform 8 (Liberty)
python-pysaml2
Not affected
Red Hat OpenStack Platform 9 (Mitaka)
python-pysaml2
Not affected
| Product | Package | State | Advisory |
|---|---|---|---|
| Red Hat Enterprise Linux OpenStack Platform 7 (Kilo) | python-pysaml2 | Not affected | n/a |
| Red Hat OpenStack Platform 10 (Newton) | python-pysaml2 | Not affected | n/a |
| Red Hat OpenStack Platform 11 (Ocata) | python-pysaml2 | Not affected | n/a |
| Red Hat OpenStack Platform 8 (Liberty) | python-pysaml2 | Not affected | n/a |
| Red Hat OpenStack Platform 9 (Mitaka) | python-pysaml2 | Not affected | n/a |
No package ranges for this CVE.
Remediation
Red Hat statement
This flaw resides in the XML Security Library (xmlsec1) and will be updated there; Red Hat OpenStack Platform is not affected.
Metrics
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H
No CVSS v3.1 score for this CVE.
CVSS:3.0/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:H
1 other source (Red Hat) ▾
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L
AV:N/AC:M/Au:N/C:P/I:P/A:P
This CVE is not in the KEV list.
No CISA SSVC assessment for this CVE yet.
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 1, 2026.
Score over time
2022–2026- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Percentile over time
- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Table of values (12 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 2.13% (0.02133) | 81.32th | v5 (v2026.06.15) |
| Jun 15, 2026 | 2.13% (0.02133) | 79.54th | v5 (v2026.06.15) |
| Mar 30, 2025 | 0.83% (0.00830) | 72.37th | v4 (v2025.03.14) |
| Mar 29, 2025 | 2.30% (0.02297) | 74.50th | v4 (v2025.03.14) |
| Mar 17, 2025 | 0.83% (0.00830) | 72.90th | v4 (v2025.03.14) |
| Dec 12, 2024 | 0.35% (0.00354) | 72.85th | v3 (v2023.03.01) |
| Feb 8, 2024 | 0.35% (0.00354) | 71.19th | v3 (v2023.03.01) |
| Mar 7, 2023 | 0.35% (0.00354) | 67.53th | v3 (v2023.03.01) |
| Mar 6, 2023 | 1.23% (0.01232) | 67.28th | v2 (v2022.01.01) |
| Dec 23, 2022 | 1.23% (0.01232) | 66.86th | v2 (v2022.01.01) |
| Apr 1, 2022 | 1.23% (0.01232) | 64.85th | v2 (v2022.01.01) |
| Feb 4, 2022 | 1.23% (0.01232) | 41.02th | v2 (v2022.01.01) |
References (13)
- http://www.openwall.com/lists/oss-security/2017/01/19/5 mailing-listx_refsource_MLISTMailing ListThird Party Advisory
- http://www.securityfocus.com/bid/95376 vdb-entryx_refsource_BIDVDB Entry
- https://access.redhat.com/security/cve/CVE-2016-10127 Vendor Advisory
- https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=850716 x_refsource_MISCMailing ListThird Party Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=1411794 Issue Tracking
- https://github.com/advisories/GHSA-m269-wj6g-c459 Advisory
- https://github.com/pypa/advisory-database/tree/main/vulns/pysaml2/PYSEC-2017-67.yaml
- https://github.com/rohe/pysaml2/commit/6e09a25d9b4b7aa7a506853210a9a14100b8bc9b x_refsource_MISCPatch
- https://github.com/rohe/pysaml2/issues/366 x_refsource_MISCIssue TrackingPatch
- https://github.com/rohe/pysaml2/pull/379 x_refsource_MISCIssue TrackingPatch
- https://nvd.nist.gov/vuln/detail/CVE-2016-10127
- https://web.archive.org/web/20200227195127/http://www.securityfocus.com/bid/95376
- https://www.cve.org/CVERecord?id=CVE-2016-10127
Change history (0)
No recorded changes yet.