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TI-2026-52550 Aliases CVE-2026-74786GHSA-w7vg-5328-m33q

Scriban before 7.0.0 Denial of Service via Unbounded Template Output

Priority MEDIUM 64CWE-770Published · Updated

Key facts

Attack vector
Network
Privileges required
Low
User interaction
None
Attack complexity
Low
Attack requirements
None
Impact type
Denial of service
Confidentiality · integrity · availability
None · None · High
Fix status
Fixed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-770.

Summary

Scriban before 7.0.0 (affected versions <= 6.6.0) contains a denial-of-service vulnerability in which the LimitToString safety limit (default 1MB) can be bypassed because ObjectToString resets the per-call length counter (_currentToStringLength) on every top-level call and StringBuilderOutput enforces no cumulative output-size limit. An attacker who can supply a template can render a near-limit string repeatedly in a loop, allocating approximately 1GB of memory and causing an out-of-memory condition that crashes the host application.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00476 41st percentileScored 2026-11-07
Fix Fixed scriban (scriban): 7.0.0

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Poc
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
scribanscribanbefore 7.0.07.0.0Patch availableCNA
  • scriban Vendorscriban Affected before 7.0.0 Fixed in 7.0.0 Patch available CNA

Remediation

  • Fix · CNA scriban (scriban) Fixed in 7.0.0

Fixed in the same release

Records fixed by the same vendor advisory or release, as the CNA lists them.

  • Release ·

    scriban 7.0.0

    8 records Highest priority Priority HIGH 5 HIGH, 3 MEDIUM

    Other records, highest priority first

    • TI-2026-52554 Scriban before 7.0.0 MemberFilter Bypass via TemplateContext CachePriority HIGH 81
    • TI-2026-52555 Scriban before 7.0.0 Authorization Bypass via Stale Include CachePriority HIGH 79
    • TI-2026-52556 Scriban before 7.0.0 Stack Overflow via nested array initializersPriority HIGH 77
    Show all 8 records →

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-74786
  2. 2026-10-03 Alias added: GHSA-w7vg-5328-m33q

References

Advisory 1

  • TI-2026-52554 Scriban before 7.0.0 MemberFilter Bypass via TemplateContext Cache CVSS 4.0CRITICAL 9.3
  • TI-2026-51270 Scriban before 7.2.2 Arbitrary Property Write via TypedObjectAccessor CVSS 4.0CRITICAL 9.3
  • TI-2026-52555 Scriban before 7.0.0 Authorization Bypass via Stale Include Cache CVSS 4.0CRITICAL 9.2
  • TI-2026-52558 Scriban before 6.6.0 Denial of Service via Infinite Recursion CVSS 4.0HIGH 8.7
  • TI-2026-52556 Scriban before 7.0.0 Stack Overflow via nested array initializers CVSS 4.0HIGH 8.7
  • TI-2026-52552 Scriban before 7.0.0 Denial of Service via string.pad_left/pad_right CVSS 4.0HIGH 8.7
See all 14 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences