CVE-2025-61921

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Source
https://nvd.nist.gov/vuln/detail/CVE-2025-61921
Import Source
https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2025-61921.json
JSON Data
https://api.test.osv.dev/v1/vulns/CVE-2025-61921
Aliases
Downstream
Related
Published
2025-10-10T19:28:10.688Z
Modified
2025-12-02T20:16:31.306500Z
Severity
  • 2.7 (Low) CVSS_V4 - CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U CVSS Calculator
Summary
Sinatra has ReDoS vulnerability in ETag header value generation
Details

Sinatra is a domain-specific language for creating web applications in Ruby. In versions prior to 4.2.0, there is a denial of service vulnerability in the If-Match and If-None-Match header parsing component of Sinatra, if the etag method is used when constructing the response. Carefully crafted input can cause If-Match and If-None-Match header parsing in Sinatra to take an unexpected amount of time, possibly resulting in a denial of service attack vector. This header is typically involved in generating the ETag header value. Any applications that use the etag method when generating a response are impacted. Version 4.2.0 fixes the issue.

Database specific 
{
    "cwe_ids": [
        "CWE-1333"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/61xxx/CVE-2025-61921.json",
    "cna_assigner": "GitHub_M"
}
References

Affected packages

Git / github.com/sinatra/sinatra

Affected ranges

Type
GIT
Repo
https://github.com/sinatra/sinatra
Events
Introduced
0 Unknown introduced commit / All previous commits are affected
Fixed
f2ad45f7d2456172974a30d300e9f82424336e09

Affected versions

0.*

0.0.1
0.1.0
0.1.5
0.1.6
0.1.7
0.2.0
0.2.2
0.3.0
0.3.1
0.3.2
0.3.3
0.9.0.1
0.9.0.2
0.9.1
0.9.1.1
0.9.2

1.*

1.0
1.0.a
1.0.b
1.1.0
1.1.a
1.1.b
1.2.0
1.2.0.a
1.2.0.b
1.2.0.c
1.2.0.d
1.2.1
1.3.0
1.3.1
1.3.2
1.4.0
1.4.1
1.4.2
1.4.3

2.*

2.0.0.rc3
2.0.0.rc4
2.0.0.rc5

Other

semver

v1.*

v1.0.0
v1.1.0
v1.2.0
v1.2.1
v1.3.0
v1.3.1
v1.3.2
v1.4.0
v1.4.1
v1.4.2
v1.4.3
v1.4.4
v1.4.5
v1.4.6

v2.*

v2.0.0
v2.0.0.beta2
v2.0.0.rc1
v2.0.0.rc2
v2.0.0.rc3
v2.0.0.rc4
v2.0.0.rc5
v2.0.0.rc6
v2.0.1
v2.0.1.rc1
v2.0.2
v2.0.3
v2.0.4
v2.0.5
v2.0.6
v2.0.7
v2.0.8
v2.0.8.1
v2.1.0
v2.2.0

v3.*

v3.0.0
v3.0.1
v3.0.2
v3.0.3
v3.0.4
v3.0.5
v3.0.6
v3.1.0
v3.2.0

v4.*

v4.0.0
v4.1.0
v4.1.1