Scriban before 7.2.2 Arbitrary Property Write via TypedObjectAccessor

published 2026-07-06 4 mo ago modified 2026-10-08 31 d ago also GHSA-7jvp-hj45-2f2m , EUVD-2026-59947

cvss: 9.8; version 3.1, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 0.4%; EPSS 0.4% chance of exploitation in 30 days, percentile 32%
public exploits: 0; none known

Scriban before 7.2.2 contains an access-modifier bypass vulnerability in TypedObjectAccessor that allows template code to write CLR object properties without setter-visibility checks. Attackers can modify properties with private, internal, or init-only setters, and perform mass assignment on public-setter properties, permanently altering live host objects after template rendering.

Patch / fix

fixed in 2

nuget Scriban 7.2.2
scriban scriban 7.2.2

CISA SSVC

Exploitation: Proof of concept is public
Automatable: yes
Technical impact: total
Assessed: 2 mo ago (2026-08-17)

Exploit prediction

0.38% chance of exploitation in the next 30 days, higher than 32% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

github.com https://github.com/scriban/scriban/security/advisories/GHSA-7jvp-hj45-2f2m referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by	version	score	vector
CNA	4.0	9.3	CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
CNA	3.1	9.8	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CNA	4.0	9.3	CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

Affected packages

ecosystem	package	affected	fixed in
nuget	Scriban	<7.2.2	7.2.2

Affected products

scriban scriban

Classification

Weakness

CWE-284 Improper Access Control
CWE-915 Improperly Controlled Modification of Dynamically-Determined Object Attributes

References

github.com /scriban/scriban/security/advisories/GHSA-7jvp-hj45-2f2m
vendor-advisory, exploit, web
vulncheck.com /advisories/scriban-before-arbitrary-property-write-via-typedobjectaccessor
third-party-advisory
github.com /scriban/scriban
package

Sources

Fencer Vulns 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.

Summary