Scriban before 7.5.2 Delegate Target Exposure via array.map Member Access
Only Scriban 7.5.1 and earlier is affected, and the high-impact variant needs a host that imported a stateful delegate via ScriptObject.Import(name, Delegate). No vendor rating is given. Fixed in 7.5.2.
Written by anthropic/claude-haiku-5.5 from the sources below. Verify against them.
- Exploited
- No known exploitation
- Fix
- Fixed in 7.5.2
- Who is exposed
- Not reported
Do first: Upgrade to a fixed version: 7.5.2.
- 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? →
- 26/100 · 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? →
- Unclear
- 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
Scriban before 7.5.2 contains an information disclosure and object manipulation vulnerability that allows template authors to access .NET internals of function values through reflection member accessors. Attackers can use array.map to read Target, Method, or ReturnType on imported delegates, exposing and overwriting service properties, captured closure secrets, and assembly paths.
cve.now Index
- Exploitation?/40Unknown. No CISA SSVC exploitation rating yet
- Exposure17/25No login or user action needed, reachable over the network without a login · Unknown: Advisories don't say whether default setups are affected
- Reach?/20Unknown. No tracked technology or package matched
- Severity9.1/10CVSS 9.1
- No patch0/5No signal
What would change the score
- Would score about 71 if added to CISA KEV
- Would score about 66 if CISA's SSVC rates exploitation active
- Would score about 31 if advisories confirm default setups are exposed
What to do
Upgrade to a fixed version: 7.5.2.
Timeline
- CVE published
- First seen by cve.now
- Posted on X by cve.now
Affected versions
- scriban scriban
fixed in 7.5.2
Evidence 2
- Advisory
- Link
Corrections
None so far.
Something wrong on this page? Report an error. Every fix is listed here.
Questions about CVE-2026-124438
Is CVE-2026-124438 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?
A template can read and write public properties and fields of a delegate's target and of objects reachable from them, including secrets such as connection strings and API keys and captured closure locals, and can change them in the live host process. Templates can also reach reflection objects that disclose install paths and runtime versions.Source: github.com
Which versions are affected by CVE-2026-124438?
scriban: before 7.5.2.Source: cve.now feed data
Am I affected, and how do I check?
Scriban 7.5.1 and earlier. The high-impact variant requires the host to have imported, through ScriptObject.Import(name, Delegate), a delegate whose Target holds state, such as an instance-method delegate or a capturing lambda. Without that, the impact is limited to information disclosure. To check, look at the Scriban package version in the project and search the code for ScriptObject.Import calls that pass delegates.Source: github.com
How do I fix CVE-2026-124438?
Upgrade Scriban to 7.5.2 or later, which is the patched version.Source: github.com