CVE-2026-66882
- Source
- https://cve.org/CVERecord?id=CVE-2026-66882
- Import Source
- https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-66882.json
- JSON Data
- https://api.osv.dev/v1/vulns/CVE-2026-66882
- Aliases
-
- EEF-CVE-2026-66882
- GHSA-54fc-x3hv-ffhw
- Published
- 2026-08-25T08:03:47Z
- Modified
- 2026-10-28T02:30:29Z
- Severity
-
- 2.1 (Low) CVSS_V4 - CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:A/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N CVSS Calculator
- Summary
- Reflected XSS in AshAuthentication confirmation and magic link interaction forms
- Details
-
Improper Neutralization of Input During Web Page Generation (XSS) vulnerability in team-alembic AshAuthentication allows reflected cross-site scripting via the confirmation and magic link interaction forms.
When a strategy is configured with require_interaction? set to true, AshAuthentication serves an intermediate HTML page asking the user to confirm the action by submitting a form. Both such pages embed a request parameter directly into a hidden input's value attribute without HTML escaping: lib/ash_authentication/add_ons/confirmation/confirmation_form.html.eex interpolates the confirm parameter, and lib/ash_authentication/strategies/magic_link/sign_in_form.html.eex interpolates the magic link token parameter. These templates are compiled with EEx.function_from_file/3 using plain <%= %> expressions, which perform no escaping, so the parameter is reflected verbatim.
Neither accept handler validates the value before rendering it. AshAuthentication.AddOn.Confirmation.Plug.accept/2 only checks that a confirm key is present, and AshAuthentication.Strategy.MagicLink.Plug.accept/2 reads the parameter directly, so no token signature is verified at this stage and arbitrary attacker-supplied text reaches the template. An unauthenticated attacker can therefore craft a URL whose parameter terminates the attribute and injects markup, for example a quote followed by a
- Database specific
{ "cna_assigner": "EEF", "cwe_ids": [ "CWE-79" ], "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/66xxx/CVE-2026-66882.json" }- References
-
- https://cna.erlef.org/cves/CVE-2026-66882.html
- https://github.com
- https://osv.dev/vulnerability/EEF-CVE-2026-66882
- https://repo.hex.pm
- https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/66xxx/CVE-2026-66882.json
- https://github.com/team-alembic/ash_authentication/security/advisories/GHSA-54fc-x3hv-ffhw
- https://nvd.nist.gov/vuln/detail/CVE-2026-66882
- https://github.com/team-alembic/ash_authentication/commit/0bd5199db066be22b2ca1ec8bc6109e5d62e6070
- https://github.com/team-alembic/ash_authentication/commit/62719710790a150a9eacab9c0a066e0d122d15be
- https://github.com/team-alembic/ash_authentication
Affected packages
Git / github.com/team-alembic/ash_authentication
Affected ranges
- Type
- GIT
- Repo
- https://github.com/team-alembic/ash_authentication
- Events
-
IntroducedFixedIntroducedFixedIntroducedFixedFixed
- Database specific
-
Show details
{ "extracted_events": [ { "range": [ { "introduced": "fe0b4558dbe852fee5d81a460a8355577618a8c8" }, { "fixed": "62719710790a150a9eacab9c0a066e0d122d15be" } ], "source": "AFFECTED_FIELD", "strategy": "ChangesAt" }, { "range": [ { "introduced": "4.8.0" }, { "fixed": "4.14.2" } ], "source": "AFFECTED_FIELD", "strategy": "StandardRange" }, { "range": [ { "introduced": "5.0.0-rc.0" }, { "fixed": "5.0.0-rc.13" } ], "source": "AFFECTED_FIELD", "strategy": "StandardRange" }, { "range": [ { "fixed": "62719710790a150a9eacab9c0a066e0d122d15be" } ], "source": "REFERENCES_COMMIT" }, { "range": [ { "fixed": "0bd5199db066be22b2ca1ec8bc6109e5d62e6070" } ], "source": "REFERENCES_COMMIT" } ] }