CVE-2020-26709 json
py-xml XML External Entity Injection vulnerability
published 3y ago modified 4mo ago also GHSA-j6v2-mwxm-f952 , PYSEC-2023-95 , EUVD-2023-0211
- cvss
- 7.5
- version 3.1, NVD
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.8%
- EPSS 0.8% chance of exploitation in 30 days, percentile 56%
- public exploits
- 0
- none known
Summary
py-xml v1.0 was discovered to contain an XML External Entity Injection (XXE) vulnerability which allows attackers to execute arbitrary code via a crafted XML file.
Is CVE-2020-26709 in your dependencies? Fencer shows which of your repositories are affected as soon as an advisory lands, and opens the fix as a pull request.
Check with FencerCISA SSVC
- Exploitation
- none
- Automatable
- yes
- Technical impact
- partial
- Assessed
- last yr.
Exploit prediction
0.80% chance of exploitation in the next 30 days, higher than 56% of all scored CVEs (FIRST EPSS, 2026-11-09).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| NVD | 3.1 | 7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
| GitHub | 3.1 | 7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| pypi | py-xml | <=1.0 all versions |
no fix listed |
Classification
- Weakness
-
- CWE-611 Improper Restriction of XML External Entity Reference
References
-
github.com
/PinaeOS/py-xml/issues/2
web, issue-tracking, third-party-advisory, report
-
nvd.nist.gov
/vuln/detail/CVE-2020-26709
advisory
-
github.com
/PinaeOS/py-xml
package
-
github.com
/pypa/advisory-database/tree/main/vulns/py-xml/PYSEC-2023-95.yaml
web
-
github.com
/advisories/GHSA-j6v2-mwxm-f952
advisory
Sources
- CVE List CVE-2020-26709
- GitHub Advisory GHSA-j6v2-mwxm-f952
- NVD CVE-2020-26709
- OSV PYSEC-2023-95
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.