CVE-2024-26144Public exploitNetwork attack vector

Session disclosure via public-cacheable Set-Cookie responses

Published Feb 27, 2024 · Updated Feb 13, 2025

Information disclosure in Ruby on Rails Active Storage 5.2.0 through 6.1.7.6 and 7.0.0 through 7.0.8 allows attackers to obtain session cookies. The ActiveStorage::Blobs::ProxyController and ActiveStorage::Representations::ProxyController mark blob responses as public-cacheable without disabling the request session, so Set-Cookie carries a user's session into shared caches. Exposure requires a caching proxy that stores the header; a later requester can receive another user's session and access the application as that user.

CVSS severity5.3
Medium
EPSS probability1.13%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Book a demo

Summary

What happened

Information disclosure in Ruby on Rails Active Storage 5.2.0 through 6.1.7.6 and 7.0.0 through 7.0.8 allows attackers to obtain session cookies. The ActiveStorage::Blobs::ProxyController and ActiveStorage::Representations::ProxyController mark blob responses as public-cacheable without disabling the request session, so Set-Cookie carries a user's session into shared caches. Exposure requires a caching proxy that stores the header; a later requester can receive another user's session and access the application as that user.

The record

CVE
CVE-2024-26144
Published
Feb 27, 2024
Updated
Feb 13, 2025
Vendor
Rails
Product
Ruby on Rails
Classifications
CWE-200, T1539
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Feb 27, 2024CVE publishedPublication date reported by the CVE source.
  2. Feb 13, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=>= 5.2.0, < 6.1.7.7
  2. Affected versionversion=5.2.0 <7.1.0
  3. Affected versionversion=>= 7.0.0, < 7.0.8.1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Rails · Ruby on Railsversion=>= 5.2.0, < 6.1.7.7; version=5.2.0 <7.1.0; version=>= 7.0.0, < 7.0.8.1

Published CVSS scores

5.3GitHub, Inc.CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-200Exposure of Sensitive Information to an Unauthorized Actor
T1539Steal Web Session Cookie

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

See the directory against your own environment.

Your stack

Check the software in your environment

Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.

Book a demo