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🛡️ CVE-2024-26144 — activestorage

🟡 CVSS 5.0 — Medium ✅ No Known Exploit CWE-200 OSV
5.0
CVSS Score
0 Low4 Medium7 High9 Critical10

Description

Rails has possible Sensitive Session Information Leak in Active Storage

# Possible Sensitive Session Information Leak in Active Storage

There is a possible sensitive session information leak in Active Storage. By

default, Active Storage sends a Set-Cookie header along with the user's

session cookie when serving blobs. It also sets Cache-Control to public.

Certain proxies may cache the Set-Cookie, leading to an information leak.

This vulnerability has been assigned the CVE identifier CVE-2024-26144.

Versions Affected: >= 5.2.0, < 7.1.0

Not affected: < 5.2.0, > 7.1.0

Fixed Versions: 7.0.8.1, 6.1.7.7

Impact

------

A proxy which chooses to caches this request can cause users to share

sessions. This may include a user receiving an attacker's session or vice

versa.

This was patched in 7.1.0 but not previously identified as a security

vulnerability.

All users running an affected release should either upgrade or use one of the

workarounds immediately.

Releases

--------

The fixed releases are available at the normal locations.

Workarounds

-----------

Upgrade to Rails 7.1.X, or configure caching proxies not to cache the

Set-Cookie headers.

Credits

-------

Thanks to [tyage](https://hackerone.com/tyage) for reporting this!

How this vulnerability can be exploited

This issue can be reached over the network, attack complexity is low, an attacker needs no privileges on the target. No user interaction is required. The scope is unchanged, so the impact stays within the vulnerable component. Rated impact: confidentiality low, integrity none, availability none.

CVSS metrics in full

The score comes from this vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

  • Attack vector: Network — reachable from anywhere that can route to the service.
  • Attack complexity: Low — the attack works reliably, with no preparation.
  • Privileges required: None — an unauthenticated stranger can try it.
  • User interaction: None — nobody has to be tricked into anything.
  • Scope: Unchanged — the damage stays inside the vulnerable component.
  • Confidentiality impact: Low — limited, and the attacker does not choose what is affected.
  • Integrity impact: None.
  • Availability impact: None.

Weakness class

CVE-2024-26144 is classified as CWE-200: Exposure of Sensitive Information. Information that should stay internal is disclosed to someone who is not authorised to see it.

Affected software

CVE-2024-26144 is recorded against 2 packages.

  • activestorage (from 7.0.0 up to 7.0.8.1)
  • rails

Timeline and source

Published on 27 February 2024 and last revised on 30 April 2025. No public exploit is currently recorded for this entry. Record sourced from OSV.

References

github.com (Web)
nvd.nist.gov (Advisory)
github.com (Web)
github.com (Web)
discuss.rubyonrails.org (Web)
github.com (Package)
github.com (Web)
github.com (Web)
security.netapp.com (Web)

Other advisories for this package

activestorage has other advisories on record. If you are patching this one, these are worth checking on the same host:

Same weakness in other software

These advisories are the same class of weakness (CWE-200: Exposure of Sensitive Information) in other software:

CVE-2024-26144 on other distributions

Each distribution ships its own build and its own fixed version. Pick the one you run:

Details

Severity Medium
CVSS Score 5.0
CVSS Vector CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
CWE CWE-200
Public Exploit ✅ No
Source OSV
Published 2024-02-27
Updated 2026-08-20
Modified 2025-04-30
Fix URL N/A

Affected Packages

Software From version Fixed in
activestorage 7.0.0 7.0.8.1
rails — —

Similar Threats

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