CVE-2026-33167
published 2026-03-23CVE-2026-33167: Action Pack is a Rubygem for building web applications on the Rails framework. In versions on the 8.1 branch prior to 8.1.2.1, the debug exceptions page does…
PriorityP417low1.3CVSS 4.0
AVNACLATNPRNUIPVCNVINVANSCLSILSANEUCRXIRXARXMAVXMACXMATXMPRXMUIXMVCXMVIXMVAXMSCXMSIXMSAXSXAUXRXVXREXUX
EPSS
0.40%
32.7th percentile
Action Pack is a Rubygem for building web applications on the Rails framework. In versions on the 8.1 branch prior to 8.1.2.1, the debug exceptions page does not properly escape exception messages. A carefully crafted exception message could inject arbitrary HTML and JavaScript into the page, leading to XSS. This affects applications with detailed exception pages enabled (`config.consider_all_requests_local = true`), which is the default in development. Version 8.1.2.1 contains a patch.
Affected
3 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| actionpack_project | actionpack | >= 8.1.0 < 8.1.2.1 | 8.1.2.1 |
| debian | rails | — | — |
| rails | actionpack | — | — |
CVSS provenance
nvdv4.01.3LOWCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N/E:U/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
osv1.3LOW
vendor_debian1.3LOW
vendor_redhat1.3LOW
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OSV
CVE-2026-33167: Action Pack is a Rubygem for building web applications on the Rails framework
osv·2026-03-23·CVSS 1.3
CVE-2026-33167 [LOW] CVE-2026-33167: Action Pack is a Rubygem for building web applications on the Rails framework
Action Pack is a Rubygem for building web applications on the Rails framework. In versions on the 8.1 branch prior to 8.1.2.1, the debug exceptions page does not properly escape exception messages. A carefully crafted exception message could inject arbitrary HTML and JavaScript into the page, leading to XSS. This affects applications with detailed exception pages enabled (`config.consider_all_requests_local = true`), which is the default in development. Version 8.1.2.1 contains a patch.
OSV
Rails has a possible XSS vulnerability in its Action Pack debug exceptions
osv·2026-03-23
CVE-2026-33167 [LOW] Rails has a possible XSS vulnerability in its Action Pack debug exceptions
Rails has a possible XSS vulnerability in its Action Pack debug exceptions
### Impact
The debug exceptions page does not properly escape exception messages. A carefully crafted exception message could inject arbitrary HTML and JavaScript into the page, leading to XSS. This affects applications with detailed exception pages enabled (`config.consider_all_requests_local = true`), which is the default in development.
### Releases
The fixed releases are available at the normal locations.
GHSA
Rails has a possible XSS vulnerability in its Action Pack debug exceptions
ghsa·2026-03-23
CVE-2026-33167 [LOW] CWE-79 Rails has a possible XSS vulnerability in its Action Pack debug exceptions
Rails has a possible XSS vulnerability in its Action Pack debug exceptions
### Impact
The debug exceptions page does not properly escape exception messages. A carefully crafted exception message could inject arbitrary HTML and JavaScript into the page, leading to XSS. This affects applications with detailed exception pages enabled (`config.consider_all_requests_local = true`), which is the default in development.
### Releases
The fixed releases are available at the normal locations.
Red Hat
Rails: Action Pack: Action Pack: Cross-Site Scripting (XSS) via improper exception message escaping
vendor_redhat·2026-03-23·CVSS 1.3
CVE-2026-33167 [LOW] CWE-79 Rails: Action Pack: Action Pack: Cross-Site Scripting (XSS) via improper exception message escaping
Rails: Action Pack: Action Pack: Cross-Site Scripting (XSS) via improper exception message escaping
Action Pack is a Rubygem for building web applications on the Rails framework. In versions on the 8.1 branch prior to 8.1.2.1, the debug exceptions page does not properly escape exception messages. A carefully crafted exception message could inject arbitrary HTML and JavaScript into the page, leading to XSS. This affects applications with detailed exception pages enabled (`config.consider_all_requests_local = true`), which is the default in development. Version 8.1.2.1 contains a patch.
A flaw was found in Action Pack, a component of the Rails framework. A remote attacker could exploit this vulnerability by crafting a malicious exception message. When this message is displayed on the debug
Debian
CVE-2026-33167: rails - Action Pack is a Rubygem for building web applications on the Rails framework. I...
vendor_debian·2026·CVSS 1.3
CVE-2026-33167 [LOW] CVE-2026-33167: rails - Action Pack is a Rubygem for building web applications on the Rails framework. I...
Action Pack is a Rubygem for building web applications on the Rails framework. In versions on the 8.1 branch prior to 8.1.2.1, the debug exceptions page does not properly escape exception messages. A carefully crafted exception message could inject arbitrary HTML and JavaScript into the page, leading to XSS. This affects applications with detailed exception pages enabled (`config.consider_all_requests_local = true`), which is the default in development. Version 8.1.2.1 contains a patch.
Scope: local
bookworm: resolved
bullseye: resolved
forky: resolved
sid: resolved
trixie: resolved
No detection rules found.
No public exploits indexed.
2026-03-23
Published