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Vulnerability details: VCID-ad6q-vtdf-syb6
Vulnerability ID VCID-ad6q-vtdf-syb6
Aliases CVE-2026-33658
GHSA-p9fm-f462-ggrg
Summary Rails Active Storage has a possible DoS vulnerability in proxy mode via multi-range requests ### Impact Active Storage's proxy controller does not limit the number of byte ranges in an HTTP Range header. A request with thousands of small ranges causes disproportionate CPU usage compared to a normal request for the same file, possibly resulting in a DoS vulnerability. ### Releases The fixed releases are available at the normal locations.
Status Published
Exploitability 0.5
Weighted Severity 6.8
Risk 3.4
Affected and Fixed Packages Package Details
Weaknesses (1)
CWE-770 Allocation of Resources Without Limits or Throttling
System Score Found at
cvssv3 7.5 https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2026-33658.json
epss 0.0005 https://api.first.org/data/v1/epss?cve=CVE-2026-33658
epss 0.0005 https://api.first.org/data/v1/epss?cve=CVE-2026-33658
epss 0.0005 https://api.first.org/data/v1/epss?cve=CVE-2026-33658
epss 0.0005 https://api.first.org/data/v1/epss?cve=CVE-2026-33658
epss 0.0005 https://api.first.org/data/v1/epss?cve=CVE-2026-33658
epss 0.0005 https://api.first.org/data/v1/epss?cve=CVE-2026-33658
epss 0.0005 https://api.first.org/data/v1/epss?cve=CVE-2026-33658
epss 0.0005 https://api.first.org/data/v1/epss?cve=CVE-2026-33658
cvssv3.1_qr LOW https://github.com/advisories/GHSA-p9fm-f462-ggrg
cvssv4 2.3 https://github.com/rails/rails
generic_textual LOW https://github.com/rails/rails
cvssv4 2.3 https://github.com/rails/rails/releases/tag/v7.2.3.1
generic_textual LOW https://github.com/rails/rails/releases/tag/v7.2.3.1
ssvc Track https://github.com/rails/rails/releases/tag/v7.2.3.1
cvssv4 2.3 https://github.com/rails/rails/releases/tag/v8.0.4.1
generic_textual LOW https://github.com/rails/rails/releases/tag/v8.0.4.1
ssvc Track https://github.com/rails/rails/releases/tag/v8.0.4.1
cvssv4 2.3 https://github.com/rails/rails/releases/tag/v8.1.2.1
generic_textual LOW https://github.com/rails/rails/releases/tag/v8.1.2.1
ssvc Track https://github.com/rails/rails/releases/tag/v8.1.2.1
cvssv3.1_qr LOW https://github.com/rails/rails/security/advisories/GHSA-p9fm-f462-ggrg
cvssv4 2.3 https://github.com/rails/rails/security/advisories/GHSA-p9fm-f462-ggrg
generic_textual LOW https://github.com/rails/rails/security/advisories/GHSA-p9fm-f462-ggrg
ssvc Track https://github.com/rails/rails/security/advisories/GHSA-p9fm-f462-ggrg
cvssv4 2.3 https://github.com/rubysec/ruby-advisory-db/blob/master/gems/activestorage/CVE-2026-33658.yml
generic_textual LOW https://github.com/rubysec/ruby-advisory-db/blob/master/gems/activestorage/CVE-2026-33658.yml
ssvc Track https://github.com/rubysec/ruby-advisory-db/blob/master/gems/activestorage/CVE-2026-33658.yml
cvssv4 2.3 https://nvd.nist.gov/vuln/detail/CVE-2026-33658
generic_textual LOW https://nvd.nist.gov/vuln/detail/CVE-2026-33658
Reference id Reference type URL
https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2026-33658.json
https://api.first.org/data/v1/epss?cve=CVE-2026-33658
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2026-33658
https://github.com/rails/rails
https://github.com/rails/rails/releases/tag/v7.2.3.1
https://github.com/rails/rails/releases/tag/v8.0.4.1
https://github.com/rails/rails/releases/tag/v8.1.2.1
https://github.com/rails/rails/security/advisories/GHSA-p9fm-f462-ggrg
https://github.com/rubysec/ruby-advisory-db/blob/master/gems/activestorage/CVE-2026-33658.yml
https://nvd.nist.gov/vuln/detail/CVE-2026-33658
1132035 https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=1132035
2451983 https://bugzilla.redhat.com/show_bug.cgi?id=2451983
GHSA-p9fm-f462-ggrg https://github.com/advisories/GHSA-p9fm-f462-ggrg
No exploits are available.
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H Found at https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2026-33658.json
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

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required

unchanged

changed

high

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low

none

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none
Vector: CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U Found at https://github.com/rails/rails
Attack Vector (AV) Attack Complexity (AC) Attack Requirements (AT) Privileges Required (PR) User Interaction (UI) Vulnerable System Impact Confidentiality (VC) Vulnerable System Impact Integrity (VI) Vulnerable System Impact Availability (VA) Subsequent System Impact Confidentiality (SC) Subsequent System Impact Integrity (SI) Subsequent System Impact Availability (SA)

network

adjacent

local

physical

low

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none

present

none

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passive

active

high

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none
Vector: CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U Found at https://github.com/rails/rails/releases/tag/v7.2.3.1
Attack Vector (AV) Attack Complexity (AC) Attack Requirements (AT) Privileges Required (PR) User Interaction (UI) Vulnerable System Impact Confidentiality (VC) Vulnerable System Impact Integrity (VI) Vulnerable System Impact Availability (VA) Subsequent System Impact Confidentiality (SC) Subsequent System Impact Integrity (SI) Subsequent System Impact Availability (SA)

network

adjacent

local

physical

low

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none

present

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passive

active

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Vector: SSVCv2/E:N/A:N/T:P/P:M/B:A/M:M/D:T/2026-03-30T11:42:16Z/ Found at https://github.com/rails/rails/releases/tag/v7.2.3.1
Vector: CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U Found at https://github.com/rails/rails/releases/tag/v8.0.4.1
Attack Vector (AV) Attack Complexity (AC) Attack Requirements (AT) Privileges Required (PR) User Interaction (UI) Vulnerable System Impact Confidentiality (VC) Vulnerable System Impact Integrity (VI) Vulnerable System Impact Availability (VA) Subsequent System Impact Confidentiality (SC) Subsequent System Impact Integrity (SI) Subsequent System Impact Availability (SA)

network

adjacent

local

physical

low

high

none

present

none

low

high

none

passive

active

high

low

none

high

low

none

high

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low

none

high

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none

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low

none
Vector: SSVCv2/E:N/A:N/T:P/P:M/B:A/M:M/D:T/2026-03-30T11:42:16Z/ Found at https://github.com/rails/rails/releases/tag/v8.0.4.1
Vector: CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U Found at https://github.com/rails/rails/releases/tag/v8.1.2.1
Attack Vector (AV) Attack Complexity (AC) Attack Requirements (AT) Privileges Required (PR) User Interaction (UI) Vulnerable System Impact Confidentiality (VC) Vulnerable System Impact Integrity (VI) Vulnerable System Impact Availability (VA) Subsequent System Impact Confidentiality (SC) Subsequent System Impact Integrity (SI) Subsequent System Impact Availability (SA)

network

adjacent

local

physical

low

high

none

present

none

low

high

none

passive

active

high

low

none

high

low

none

high

low

none

high

low

none

high

low

none

high

low

none
Vector: SSVCv2/E:N/A:N/T:P/P:M/B:A/M:M/D:T/2026-03-30T11:42:16Z/ Found at https://github.com/rails/rails/releases/tag/v8.1.2.1
Vector: CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U Found at https://github.com/rails/rails/security/advisories/GHSA-p9fm-f462-ggrg
Attack Vector (AV) Attack Complexity (AC) Attack Requirements (AT) Privileges Required (PR) User Interaction (UI) Vulnerable System Impact Confidentiality (VC) Vulnerable System Impact Integrity (VI) Vulnerable System Impact Availability (VA) Subsequent System Impact Confidentiality (SC) Subsequent System Impact Integrity (SI) Subsequent System Impact Availability (SA)

network

adjacent

local

physical

low

high

none

present

none

low

high

none

passive

active

high

low

none

high

low

none

high

low

none

high

low

none

high

low

none

high

low

none
Vector: SSVCv2/E:N/A:N/T:P/P:M/B:A/M:M/D:T/2026-03-30T11:42:16Z/ Found at https://github.com/rails/rails/security/advisories/GHSA-p9fm-f462-ggrg
Vector: CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U Found at https://github.com/rubysec/ruby-advisory-db/blob/master/gems/activestorage/CVE-2026-33658.yml
Attack Vector (AV) Attack Complexity (AC) Attack Requirements (AT) Privileges Required (PR) User Interaction (UI) Vulnerable System Impact Confidentiality (VC) Vulnerable System Impact Integrity (VI) Vulnerable System Impact Availability (VA) Subsequent System Impact Confidentiality (SC) Subsequent System Impact Integrity (SI) Subsequent System Impact Availability (SA)

network

adjacent

local

physical

low

high

none

present

none

low

high

none

passive

active

high

low

none

high

low

none

high

low

none

high

low

none

high

low

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low

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Vector: SSVCv2/E:N/A:N/T:P/P:M/B:A/M:M/D:T/2026-03-30T11:42:16Z/ Found at https://github.com/rubysec/ruby-advisory-db/blob/master/gems/activestorage/CVE-2026-33658.yml
Vector: CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U Found at https://nvd.nist.gov/vuln/detail/CVE-2026-33658
Attack Vector (AV) Attack Complexity (AC) Attack Requirements (AT) Privileges Required (PR) User Interaction (UI) Vulnerable System Impact Confidentiality (VC) Vulnerable System Impact Integrity (VI) Vulnerable System Impact Availability (VA) Subsequent System Impact Confidentiality (SC) Subsequent System Impact Integrity (SI) Subsequent System Impact Availability (SA)

network

adjacent

local

physical

low

high

none

present

none

low

high

none

passive

active

high

low

none

high

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none

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Exploit Prediction Scoring System (EPSS)
Percentile 0.15667
EPSS Score 0.0005
Published At April 2, 2026, 12:55 p.m.
Date Actor Action Source VulnerableCode Version
2026-04-01T12:54:01.332690+00:00 GithubOSV Importer Import https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/03/GHSA-p9fm-f462-ggrg/GHSA-p9fm-f462-ggrg.json 38.0.0