Staging Environment: Content and features may be unstable or change without notice.
Search for vulnerabilities
Vulnerability details: VCID-yfms-12uu-a7hy
Vulnerability ID VCID-yfms-12uu-a7hy
Aliases CVE-2026-34148
GHSA-gm9m-gwc4-hwgp
Summary Fedify is a TypeScript library for building federated server apps powered by ActivityPub. Prior to 1.9.6, 1.10.5, 2.0.8, and 2.1.1, @fedify/fedify follows HTTP redirects recursively in its remote document loader and authenticated document loader without enforcing a maximum redirect count or visited-URL loop detection. An attacker who controls a remote ActivityPub key or actor URL can force a server using Fedify to make repeated outbound requests from a single inbound request, leading to resource consumption and denial of service. This vulnerability is fixed in 1.9.6, 1.10.5, 2.0.8, and 2.1.1.
Status Published
Exploitability 0.5
Weighted Severity 8.0
Risk 4.0
Affected and Fixed Packages Package Details
Weaknesses (4)
CWE-400 Uncontrolled Resource Consumption
CWE-770 Allocation of Resources Without Limits or Throttling
CWE-937 OWASP Top Ten 2013 Category A9 - Using Components with Known Vulnerabilities
CWE-1035 OWASP Top Ten 2017 Category A9 - Using Components with Known Vulnerabilities
System Score Found at
epss 0.00086 https://api.first.org/data/v1/epss?cve=CVE-2026-34148
epss 0.00086 https://api.first.org/data/v1/epss?cve=CVE-2026-34148
epss 0.0009 https://api.first.org/data/v1/epss?cve=CVE-2026-34148
cvssv3.1_qr HIGH https://github.com/advisories/GHSA-gm9m-gwc4-hwgp
cvssv3.1 7.5 https://github.com/fedify-dev/fedify
generic_textual HIGH https://github.com/fedify-dev/fedify
cvssv3.1 7.5 https://github.com/fedify-dev/fedify/releases/tag/1.10.5
generic_textual HIGH https://github.com/fedify-dev/fedify/releases/tag/1.10.5
ssvc Track https://github.com/fedify-dev/fedify/releases/tag/1.10.5
cvssv3.1 7.5 https://github.com/fedify-dev/fedify/releases/tag/1.9.6
generic_textual HIGH https://github.com/fedify-dev/fedify/releases/tag/1.9.6
ssvc Track https://github.com/fedify-dev/fedify/releases/tag/1.9.6
cvssv3.1 7.5 https://github.com/fedify-dev/fedify/releases/tag/2.0.8
generic_textual HIGH https://github.com/fedify-dev/fedify/releases/tag/2.0.8
ssvc Track https://github.com/fedify-dev/fedify/releases/tag/2.0.8
cvssv3.1 7.5 https://github.com/fedify-dev/fedify/releases/tag/2.1.1
generic_textual HIGH https://github.com/fedify-dev/fedify/releases/tag/2.1.1
ssvc Track https://github.com/fedify-dev/fedify/releases/tag/2.1.1
cvssv3.1 7.5 https://github.com/fedify-dev/fedify/security/advisories/GHSA-gm9m-gwc4-hwgp
cvssv3.1_qr HIGH https://github.com/fedify-dev/fedify/security/advisories/GHSA-gm9m-gwc4-hwgp
generic_textual HIGH https://github.com/fedify-dev/fedify/security/advisories/GHSA-gm9m-gwc4-hwgp
ssvc Track https://github.com/fedify-dev/fedify/security/advisories/GHSA-gm9m-gwc4-hwgp
cvssv3.1 7.5 https://nvd.nist.gov/vuln/detail/CVE-2026-34148
generic_textual HIGH https://nvd.nist.gov/vuln/detail/CVE-2026-34148
Reference id Reference type URL
https://api.first.org/data/v1/epss?cve=CVE-2026-34148
https://github.com/fedify-dev/fedify
https://nvd.nist.gov/vuln/detail/CVE-2026-34148
1.10.5 https://github.com/fedify-dev/fedify/releases/tag/1.10.5
1.9.6 https://github.com/fedify-dev/fedify/releases/tag/1.9.6
2.0.8 https://github.com/fedify-dev/fedify/releases/tag/2.0.8
2.1.1 https://github.com/fedify-dev/fedify/releases/tag/2.1.1
GHSA-gm9m-gwc4-hwgp https://github.com/advisories/GHSA-gm9m-gwc4-hwgp
GHSA-gm9m-gwc4-hwgp https://github.com/fedify-dev/fedify/security/advisories/GHSA-gm9m-gwc4-hwgp
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://github.com/fedify-dev/fedify
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

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H Found at https://github.com/fedify-dev/fedify/releases/tag/1.10.5
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

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: SSVCv2/E:P/A:Y/T:P/P:M/B:A/M:M/D:T/2026-04-06T15:35:17Z/ Found at https://github.com/fedify-dev/fedify/releases/tag/1.10.5
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H Found at https://github.com/fedify-dev/fedify/releases/tag/1.9.6
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

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: SSVCv2/E:P/A:Y/T:P/P:M/B:A/M:M/D:T/2026-04-06T15:35:17Z/ Found at https://github.com/fedify-dev/fedify/releases/tag/1.9.6
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H Found at https://github.com/fedify-dev/fedify/releases/tag/2.0.8
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

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: SSVCv2/E:P/A:Y/T:P/P:M/B:A/M:M/D:T/2026-04-06T15:35:17Z/ Found at https://github.com/fedify-dev/fedify/releases/tag/2.0.8
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H Found at https://github.com/fedify-dev/fedify/releases/tag/2.1.1
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

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: SSVCv2/E:P/A:Y/T:P/P:M/B:A/M:M/D:T/2026-04-06T15:35:17Z/ Found at https://github.com/fedify-dev/fedify/releases/tag/2.1.1
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H Found at https://github.com/fedify-dev/fedify/security/advisories/GHSA-gm9m-gwc4-hwgp
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

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: SSVCv2/E:P/A:Y/T:P/P:M/B:A/M:M/D:T/2026-04-06T15:35:17Z/ Found at https://github.com/fedify-dev/fedify/security/advisories/GHSA-gm9m-gwc4-hwgp
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H Found at https://nvd.nist.gov/vuln/detail/CVE-2026-34148
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

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Exploit Prediction Scoring System (EPSS)
Percentile 0.24801
EPSS Score 0.00086
Published At June 11, 2026, 12:55 p.m.
Date Actor Action Source VulnerableCode Version
2026-06-11T16:47:14.905075+00:00 Vulnrichment Import https://github.com/cisagov/vulnrichment/blob/develop/2026/34xxx/CVE-2026-34148.json 38.6.0