CVE-2026-118505: team-alembic ash_authentication · Improper Restriction of Excessive Authentication Attempts
Affects team-alembic ash_authenticationSource CVE Database V5
Not known to be exploited · CVSS 6.3 Medium : upgrade to 5.0.0-rc.16 when convenient.
Data as of 3 Nov 2026, 18:13 UTC
Thin evidence
One scorer or none| CNA (EEF) | CVSS 4.0 | 6.3 |
|---|
- Patch
- Available – fixed in 5.0.0-rc.16, 7117b5da5b73ee4cdb372e4adfbaff409b527125
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:NExploitation evidence
Disclosed: evidence found.
CVE published 3 Nov 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponized: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors
A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 3 Nov 2026.
What to do
Upgrade ash_authentication to 5.0.0-rc.16; ash_authentication to 7117b5da5b73ee4cdb372e4adfbaff409b527125.
Affected software
| Product | Affected | Fixed in |
|---|---|---|
| team-alembicash_authentication | Affected
| Fixed in
|
| ash_authenticationteam-alembic/ash_authentication | Affected
| Fixed in
|
Hexash_authenticationpkg:hex/ash_authenticationOther threats | Affected
| Fixed in
|
CPE configurations (1)
cpe:2.3:a:team-alembic:ash_authentication:*:*:*:*:*:*:*:*
Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.
Description
Improper Restriction of Excessive Authentication Attempts vulnerability in team-alembic ash_authentication allows an unauthenticated attacker to guess passwords and one-time passwords without limit. The password, magic link and OTP strategies enforce brute_force_strategy by adding a preparation only to the actions they generate. When the resource defines one of those actions itself, the strategy uses it as written and nothing checked that it carried the preparation, so the setting compiled and applied no limit. The generators produce exactly this: mix ash_authentication.install writes sign_in_with_password, request_password_reset_token and request_magic_link, mix ash_authentication.upgrade then adds brute_force_strategy to those strategies, and mix ash_authentication.add_strategy.otp writes its OTP actions without the preparation. Separately, with registration_enabled? true the OTP sign-in is a create action, which preparations do not run on, so brute_force_strategy {:preparation, module} never applied to it. This issue affects ash_authentication: from 5.0.0-rc.4 before 5.0.0-rc.16.
References
- github.com/team-alembic/ash_authentication/security/advisories/GHSA-55gf-3263-4r39 (opens in a new tab)
- cna.erlef.org/cves/CVE-2026-118505.html (opens in a new tab)
- osv.dev/vulnerability/EEF-CVE-2026-118505 (opens in a new tab)
- github.com/team-alembic/ash_authentication/commit/800caa0d4a5bee1f28ad427f4c12fab72003a577 (opens in a new tab)
- github.com/team-alembic/ash_authentication/commit/7117b5da5b73ee4cdb372e4adfbaff409b527125 (opens in a new tab)