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No exploitation reportedAwaiting NVD analysis

CVE-2026-124439

Scriban before 7.5.3 Denial of Service via Uncatchable StackOverflowException

No exploitation reported by the sources we read.

  • Published2026-11-08
  • WeaknessCWE-674

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

Description

Scriban and Scriban.Signed before 7.5.3 contain uncontrolled recursion flaws in which postfix member, indexer, and call chains bypass ExpressionDepthLimit, array comparison lacks depth and cycle checks, and object.eval bypasses RecursiveLimit. Attackers who can supply templates can trigger an uncatchable StackOverflowException that terminates the host process.

Timeline

dates in UTC
  1. 2026-11-0813:15CVE publishedCNA

Versions per branch

Products declared by the CNA

As VulnCheck, the CNA that assigned this CVE, declared them in the CVE record; versions as written. NVD lists no product for this CVE yet: this is the only product data so far.

  • scribanother versions: not affected
    Affected
    • < 7.5.3fixed in 7.5.3semver

    Not affected = 7.5.3

  • scribanother versions: not affected
    Affected
    • < 7.5.3fixed in 7.5.3semver

    Not affected = 7.5.3

Source: the CNA record (CVE Program), © The MITRE Corporation,CVE Terms of UseCVE recordupdated 2026-11-08

Neither OSV.dev nor the vendor advisories we read list affected versions for CVE-2026-124439 yet.

Full record on NVD

Fix

No fix published by the sources we read yet. NVD record

Detection

Nuclei template
none so far
ProjectDiscovery
Exploit-DB
no entry
Exploit-DB
Metasploit modules
none listed
Metasploit Framework

Sources

  • NVDCVE record2026-11-08
  • CNACVSS 4.08.72026-11-08
  • CNACVSS 3.17.52026-11-08
  • CNAweakness (CWE)CWE-6742026-11-08

Technical details

CVSS v3 Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CVSS 4.0 vector
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
Published
2026-11-08

Frequently asked questions

What is CVE-2026-124439?

Scriban and Scriban.Signed before 7.5.3 contain uncontrolled recursion flaws in which postfix member, indexer, and call chains bypass ExpressionDepthLimit, array comparison lacks depth and cycle checks, and object.eval bypasses RecursiveLimit. Attackers who can supply templates can trigger an uncatchable StackOverflowException that terminates the host process.

Is CVE-2026-124439 actively exploited?

Active exploitation of CVE-2026-124439 has not been confirmed.

What is the CVSS score for CVE-2026-124439?

CVE-2026-124439 has a CVSS v3 base score of 7.5 (HIGH severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

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