Treeio through 2.0 Insecure Deserialization RCE via Admin-Editable Pickle Fields
Treeio 2.0 and earlier are affected when the code calls pickle.loads() on admin-editable fields in treeio/core/models.py. No fixed version is listed.
Written by anthropic/claude-haiku-5.5 from the sources below. Verify against them.
- Exploited
- No known exploitation
- Fix
- No fix listed
- Who is exposed
- Specific setups only
Do first: Check whether your setup matches what the bug needs. Treeio version 2.0 or earlier is affected. The code must call pickle.loads() on the affected fields in treeio/core/models.py, which the issue says applies to all versions containing it.
- Last modified
- A 0-100 score for how much a CVE matters across the industry: exploitation, exposure, how widely the software is used, severity and whether a fix exists.What do these mean? →
- 22/100 · provisional
- How many real-world setups can hit the bug, from the vendor's advisory and CISA data. It does not know your setup.What do these mean? →
- Specific setups only
- Whether working attack code is public (Exploit-DB, Metasploit, Nuclei or GitHub). Public code makes attacks easier.What do these mean? →
- None on Exploit-DB, Metasploit or GitHub
Summary
Treeio through 2.0 has an insecure deserialization flaw that lets a logged-in staff user run arbitrary Python code as the web server user by storing a crafted pickle payload in an UpdateRecord format_strings field through the Django admin, which executes when news feeds render. The bug is reached remotely over the network, but the attacker needs high-privilege staff credentials.
Read the original description
Treeio through 2.0 contains an insecure deserialization vulnerability in UpdateRecord.get_format_strings and ModuleSetting.loads that allows staff users to execute code via unverified pickle data. Attackers can store a crafted base64 pickle payload in an UpdateRecord format_strings field through the Django admin, executing Python code as the web server user when news feeds render.
cve.now Index
- Exploitation?/40Unknown. No CISA SSVC exploitation rating yet
- Exposure8/25Specific setups only, reachable over the network
- Reach?/20Unknown. No tracked technology or package matched
- Severity8.6/10CVSS 8.6
- No patch5/5No patch listed yet
What would change the score
- Would score about 72 if added to CISA KEV
- Would score about 67 if CISA's SSVC rates exploitation active
- Would score about 29 if CISA's SSVC rates it automatable
What to do
Check whether your setup matches what the bug needs.
Treeio version 2.0 or earlier is affected. The code must call pickle.loads() on the affected fields in treeio/core/models.py, which the issue says applies to all versions containing it.Workaround: No fix is listed in the checked facts. Limiting who can edit the affected admin fields to trusted administrators reduces exposure until a fix is available.
Timeline
- CVE published
- First seen by cve.now
Affected versions
- treeio treeio
through 2.0
Evidence 5
- Report
- Repository
- Repository
- Repository
- Link
Corrections
None so far.
Something wrong on this page? Report an error. Every fix is listed here.
Questions about CVE-2026-124318
Is CVE-2026-124318 being exploited?
It is not in CISA's Known Exploited Vulnerabilities catalog, and CISA's SSVC assessment does not mark exploitation as active. That does not mean it has not been attacked: vendors and researchers can report attacks before CISA lists them. No public exploit code is tracked.Source: cve.now feed data
What does this mean?
Admin-editable fields are deserialized with pickle, so crafted data can make Treeio run Python code as the web server user, which can lead to code execution on the host.Source: vulncheck.com, github.com
Which versions are affected by CVE-2026-124318?
treeio: through 2.0.Source: cve.now feed data
Am I affected, and how do I check?
The issue says Treeio version 2.0 or earlier is affected, and that all versions containing pickle.loads() on the affected fields in treeio/core/models.py are affected. To check, look at your installed Treeio version and search treeio/core/models.py for pickle.loads().Source: vulncheck.com, github.com
How do I fix CVE-2026-124318?
The checked facts name no fixed version, so no upgrade target is established. Check the project for a release later than 2.0 before relying on one.Source: vulncheck.com, github.com
What if there's no patch?
No fix is listed in the checked facts. Limiting who can edit the affected admin fields to trusted administrators reduces exposure until a fix is available.Source: vulncheck.com, github.com