CVE-2026-82739
What it is
Generation of Error Message Containing Sensitive Information vulnerability in ash-project ash discloses the stored value of a confirmed field to an actor who fails its confirmation check. Ash.Resource.Validation.Confirm's atomic implementation (atomic/2 in lib/ash/resource/validation/confirm.ex) built the mismatch error with its value set to the field being confirmed. When the actor supplies only the confirmation argument and not the field itself, value resolves through atomic_ref/2 to the field's current stored value, so the mismatch error echoes that stored value back to the actor. Against a confirmation guarding a sensitive attribute, an actor can submit a deliberately wrong confirmation and read the real value from the returned error. The fix reports the actor-supplied confirmation in the error instead of the stored field value. This issue affects ash: from 2.17.20 before 3.32.2.
At a glance
- Exploitability
- Can be exploited locally on the machine without logging in. Limited direct impact.
- Exploit odds
- 0.2% chance of exploitation in the next 30 days (EPSS).
- Fix
- A patch, advisory or fixed version is referenced. Upgrade or apply it.
Timeline
- PublishedDisclosed publicly on CVE.org and NVD
- Last updatedMost recent change to the record
Why it ranks here
- Exploited in the wild: no, CISA does not list it.
- Exploit odds: 0.2% in the next 30 days (EPSS).
- Severity: 2.1 LOW (CVSS).
- Fix: a patch or advisory is linked.
Details
- Published
- Last modified
- Exploit probability
- 0.2% · EPSS, next 30 days
- Weakness
- CWE-209
- Record status
- Deferred
Attack profile CVSS 4.0 · 2.1
- Attack vector
- Local
- Complexity
- Low
- Attack requirements
- Present
- Privileges needed
- None
- User interaction
- None
- Confidentiality
- Low
- Integrity
- None
- Availability
- None
Raw vector
CVSS:4.0/AV:L/AC:L/AT:P/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Is it in your code?
Hand this to your coding agent. It searches your project for the affected products and checks versions. Nothing leaves your machine.
Read https://cve-list.com/agent/cve/CVE-2026-82739.md and follow it. Check whether this project is affected by CVE-2026-82739. Read only. Don't change anything and don't upload my code. Tell me yes, no or not sure, with the file as proof.
Fix and advisories
- https://github.com/ash-project/ash/commit/7dfe5f0b1ba4267580ded947dc861351d4dc8e2b
- https://github.com/ash-project/ash/security/advisories/GHSA-66cg-vj5m-8w7v
- https://github.com/ash-project/ash/security/advisories/GHSA-66cg-vj5m-8w7v
References
- https://cna.erlef.org/cves/CVE-2026-82739.html
- https://github.com/ash-project/ash/commit/7dfe5f0b1ba4267580ded947dc861351d4dc8e2b
- https://github.com/ash-project/ash/security/advisories/GHSA-66cg-vj5m-8w7v
- https://osv.dev/vulnerability/EEF-CVE-2026-82739
- https://github.com/ash-project/ash/security/advisories/GHSA-66cg-vj5m-8w7v