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CVE-2026-33202

Rails Active Storage has possible glob injection in its DiskService

6.6 MediumFix available

Active Storage allows users to attach cloud and local files in Rails applications. Prior to versions 8.1.2.1, 8.0.4.1, and 7.2.3.1, Active Storage's DiskService#delete_prefixed passes blob keys directly to Dir.glob without escaping glob metacharacters. If a blob key contains attacker-controlled input or custom-generated keys with glob metacharacters, it may be possible to delete unintended files from the storage directory. Versions 8.1.2.1, 8.0.4.1, and 7.2.3.1 contain a patch.

Attack profile

How easy it is to exploit

Attack vector
Network
Complexity
Low
Privileges needed
None
User interaction
None

What an attacker can affect

Confidentiality
None
Integrity
High
Availability
None

Exploit likelihood

0.67%Up 0.7 points since Mar 24, 2026
90%50%10%1%

What each source reports

CVE List Score used 6.6

Rails Active Storage has possible glob injection in its DiskService

Active Storage allows users to attach cloud and local files in Rails applications. Prior to versions 8.1.2.1, 8.0.4.1, and 7.2.3.1, Active Storage's DiskService#delete_prefixed passes blob keys directly to Dir.glob without escaping glob metacharacters. If a blob key contains attacker-controlled input or custom-generated keys with glob metacharacters, it may be possible to delete unintended files from the storage directory. Versions 8.1.2.1, 8.0.4.1, and 7.2.3.1 contain a patch.

Record
CVE-2026-33202
CVSS 4.0
6.6 MediumCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N/E:U
Weakness
CWE-74
Updated
2026-11-02
EUVDEUVD-2026-14634 6.6

Active Storage allows users to attach cloud and local files in Rails applications. Prior to versions 8.1.2.1, 8.0.4.1, and 7.2.3.1, Active Storage's DiskService#delete_prefixed passes blob keys directly to Dir.glob without escaping glob metacharacters. If a blob key contains attacker-controlled input or custom-generated keys with glob metacharacters, it may be possible to delete unintended files from the storage directory. Versions 8.1.2.1, 8.0.4.1, and 7.2.3.1 contain a patch.

Record
EUVD-2026-14634
CVSS 4.0
6.6 MediumCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N/E:U
Updated
2026-11-02
GitHub AdvisoriesGHSA-73f9-jhhh-hr5m 6.6

Rails Active Storage has possible glob injection in its DiskService

Impact

Active Storage's DiskService#delete_prefixed passes blob keys directly to Dir.glob without escaping glob metacharacters. If a blob key contains attacker-controlled input or custom-generated keys with glob metacharacters, it may be possible to delete unintended files from the storage directory.

Releases

The fixed releases are available at the normal locations.

Record
GHSA-73f9-jhhh-hr5m
CVSS 4.0
6.6 MediumCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N/E:U
Weakness
CWE-74
Updated
2026-11-02
NVD 6.6

Active Storage allows users to attach cloud and local files in Rails applications. Prior to versions 8.1.2.1, 8.0.4.1, and 7.2.3.1, Active Storage's DiskService#delete_prefixed passes blob keys directly to Dir.glob without escaping glob metacharacters. If a blob key contains attacker-controlled input or custom-generated keys with glob metacharacters, it may be possible to delete unintended files from the storage directory. Versions 8.1.2.1, 8.0.4.1, and 7.2.3.1 contain a patch.

Record
CVE-2026-33202
CVSS 4.0
6.6 MediumCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/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
CVSS 3.1
9.1 CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H
Weakness
CWE-74
Updated
2026-11-02
OSV 6.6

Rails Active Storage has possible glob injection in its DiskService

Active Storage allows users to attach cloud and local files in Rails applications. Prior to versions 8.1.2.1, 8.0.4.1, and 7.2.3.1, Active Storage's DiskService#delete_prefixed passes blob keys directly to Dir.glob without escaping glob metacharacters. If a blob key contains attacker-controlled input or custom-generated keys with glob metacharacters, it may be possible to delete unintended files from the storage directory. Versions 8.1.2.1, 8.0.4.1, and 7.2.3.1 contain a patch.

Record
CVE-2026-33202
CVSS 4.0
6.6 MediumCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N/E:U
Weakness
CWE-74
Updated
2026-11-02
OSVDEBIAN-CVE-2026-33202 9.1

Active Storage allows users to attach cloud and local files in Rails applications. Prior to versions 8.1.2.1, 8.0.4.1, and 7.2.3.1, Active Storage's DiskService#delete_prefixed passes blob keys directly to Dir.glob without escaping glob metacharacters. If a blob key contains attacker-controlled input or custom-generated keys with glob metacharacters, it may be possible to delete unintended files from the storage directory. Versions 8.1.2.1, 8.0.4.1, and 7.2.3.1 contain a patch.

Record
DEBIAN-CVE-2026-33202
CVSS 3.1
9.1 CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H
Updated
2026-11-02
OSVGHSA-73f9-jhhh-hr5m 6.6

Rails Active Storage has possible glob injection in its DiskService

Impact

Active Storage's DiskService#delete_prefixed passes blob keys directly to Dir.glob without escaping glob metacharacters. If a blob key contains attacker-controlled input or custom-generated keys with glob metacharacters, it may be possible to delete unintended files from the storage directory.

Releases

The fixed releases are available at the normal locations.

Record
GHSA-73f9-jhhh-hr5m
CVSS 4.0
6.6 MediumCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N/E:U
Weakness
CWE-74
Updated
2026-11-02
OSVUBUNTU-CVE-2026-33202 6.6

Active Storage allows users to attach cloud and local files in Rails applications. Prior to versions 8.1.2.1, 8.0.4.1, and 7.2.3.1, Active Storage's DiskService#delete_prefixed passes blob keys directly to Dir.glob without escaping glob metacharacters. If a blob key contains attacker-controlled input or custom-generated keys with glob metacharacters, it may be possible to delete unintended files from the storage directory. Versions 8.1.2.1, 8.0.4.1, and 7.2.3.1 contain a patch.

Record
UBUNTU-CVE-2026-33202
CVSS 4.0
6.6 MediumCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N/E:U
CVSS 3.1
9.1 CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H
Updated
2026-11-02

Affected products

Affected packages

Affected packages
PackageAffectedFixed
activestorage
RubyGems
 8.1.0.beta1 up to 8.1.2.1
8.1.2.1
activestorage
RubyGems
 8.0.0.beta1 up to 8.0.4.1
8.0.4.1
activestorage
RubyGems
 before 7.2.3.1
7.2.3.1
rails
Debian:12
 before 2:6.1.7.10+dfsg-1~deb12u3, plus listed versions
2:6.1.7.10+dfsg-1~deb12u12:6.1.7.10+dfsg-1~deb12u22:6.1.7.3+dfsg-12:6.1.7.3+dfsg-102:6.1.7.3+dfsg-11
Show 12 moreShow less
2:6.1.7.3+dfsg-122:6.1.7.3+dfsg-132:6.1.7.3+dfsg-22:6.1.7.3+dfsg-2~deb12u12:6.1.7.3+dfsg-32:6.1.7.3+dfsg-42:6.1.7.3+dfsg-52:6.1.7.3+dfsg-62:6.1.7.3+dfsg-72:6.1.7.3+dfsg-7~exp12:6.1.7.3+dfsg-82:6.1.7.3+dfsg-9
2:6.1.7.10+dfsg-1~deb12u3
rails
Debian:13
 before 2:7.2.2.2+dfsg-2~deb13u2, plus listed versions
2:7.2.2.1+dfsg-72:7.2.2.2+dfsg-12:7.2.2.2+dfsg-2~deb13u1
2:7.2.2.2+dfsg-2~deb13u2
rails
Debian:14
 before 2:7.2.3.1+dfsg-1, plus listed versions
2:7.2.2.1+dfsg-72:7.2.2.2+dfsg-12:7.2.2.2+dfsg-22:7.2.2.2+dfsg-2~deb13u12:7.2.2.2+dfsg-2~deb13u22:7.2.3+dfsg-12:7.2.3+dfsg-22:7.2.3+dfsg-3
2:7.2.3.1+dfsg-1
activestorage
RubyGems
 8.1.0.beta1 up to 8.1.2.1, plus listed versions
8.1.08.1.0.rc18.1.18.1.2
8.1.2.1
activestorage
RubyGems
 8.0.0.beta1 up to 8.0.4.1, plus listed versions
8.0.08.0.0.18.0.0.rc18.0.0.rc28.0.1
Show 4 moreShow less
8.0.28.0.2.18.0.38.0.4
8.0.4.1
activestorage
RubyGems
 before 7.2.3.1, plus listed versions
0.15.2.05.2.0.beta15.2.0.beta25.2.0.rc1
Show 45 moreShow less
5.2.0.rc25.2.15.2.1.15.2.1.rc15.2.25.2.2.15.2.2.rc15.2.35.2.3.rc15.2.45.2.4.15.2.4.25.2.4.35.2.4.45.2.4.55.2.4.65.2.4.rc15.2.55.2.65.2.6.15.2.6.25.2.6.35.2.75.2.7.15.2.85.2.8.16.0.06.0.0.beta16.0.0.beta26.0.0.beta36.0.0.rc16.0.0.rc26.0.16.0.1.rc16.0.26.0.2.16.0.2.26.0.2.rc16.0.2.rc26.0.36.0.3.16.0.3.26.0.3.36.0.3.46.0.3.5
7.2.3.1
rails
Ubuntu:Pro:16.04:LTS
 All versions, plus listed versions
2:4.1.10-12:4.2.5-12:4.2.5.1-12:4.2.5.2-22:4.2.6-12:4.2.6-1ubuntu0.1~esm12:4.2.6-1ubuntu0.1~esm2
 None known
Show 7 moreShow less
Affected packages
PackageAffectedFixed
rails
Ubuntu:Pro:18.04:LTS
 All versions, plus listed versions
2:4.2.9-22:4.2.9-42:4.2.10-0ubuntu42:4.2.10-0ubuntu4+esm12:4.2.10-0ubuntu4+esm2
 None known
rails
Ubuntu:Pro:20.04:LTS
 All versions, plus listed versions
2:5.2.2.1+dfsg-1ubuntu12:5.2.3+dfsg-32:5.2.3+dfsg-3ubuntu0.1~esm1
 None known
rails
Ubuntu:Pro:22.04:LTS
 All versions, plus listed versions
2:6.0.3.7+dfsg-22:6.1.4.1+dfsg-8ubuntu22:6.1.4.1+dfsg-8ubuntu2+esm1
 None known
rails
Ubuntu:24.04:LTS
 All versions, plus listed versions
2:6.1.7.3+dfsg-2build12:6.1.7.3+dfsg-3
 None known
rails
Ubuntu:25.10
 All versions, plus listed versions
2:6.1.7.3+dfsg-72:7.2.2.1+dfsg-7
 None known
rails
Ubuntu:26.10
 All versions, plus listed versions
2:7.2.3+dfsg-22:7.2.3.2+dfsg-2
 None known
rails
Ubuntu:26.04:LTS
 All versions, plus listed versions
2:7.2.2.1+dfsg-72:7.2.2.2+dfsg-22:7.2.3+dfsg-2
 None known

History

History
RecordedChangedSources
first indexedCVE List, EUVD, GitHub Advisories, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2026-33202 is a medium vulnerability (CVSS 6.6) in Rubyonrails Rails, published March 23, 2026. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.67%, the 52nd percentile. Fixed in activestorage 8.1.2.1.

References

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