{"answers":{"affected":"2 open source packages ship an affected version, including actionmailbox.","exploited":"There is no known exploitation of CVE-2026-126068 in the wild and no public exploit code.","exposure":"","fix":"Upgrade actionmailbox to a fixed version for your release line: 8.0.5.2 or 8.1.4.1.","what":"CVE-2026-126068 is a low-severity vulnerability in rails, published on 10 Nov 2026."},"fix_prompt":"Check this codebase for CVE-2026-126068 and fix it if it is affected.\n\nWhat it is: CVE-2026-126068 is a low-severity vulnerability in rails, published on 10 Nov 2026. \nExploitation: There is no known exploitation of CVE-2026-126068 in the wild and no public exploit code.\n\nAffected packages and fixed versions:\n- actionmailbox (RubyGems): affected all versions; fixed in 8.0.5.2\n- actionmailbox (RubyGems): affected from 8.1.0.beta1; fixed in 8.1.4.1\n\nTask:\n1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.\n2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.\n3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.\n4. Run the tests and summarise what changed and why.\n5. If nothing in the project is affected, say so and change nothing.\n\nReference: https://insights.sbomify.com/CVE-2026-126068/ (Markdown: https://insights.sbomify.com/CVE-2026-126068/index.md)","id":"CVE-2026-126068","markdown":"https://insights.sbomify.com/CVE-2026-126068/index.md","name":"CVE-2026-126068","record":{"aliases":["DEBIAN-CVE-2026-126068","GHSA-5957-c7qm-m469","UBUNTU-CVE-2026-126068"],"analysis":null,"analysis_generated_by":null,"assigner":"GitHub_M","cpe":[],"cvss":{"score":3.7,"severity":"low","source":"cna","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N","version":"3.1"},"cwes":[{"id":"CWE-294","name":"Authentication Bypass by Capture-replay"}],"description":"Action Mailbox routes incoming emails to controller-like mailboxes for processing in Rails. Prior to 8.1.4.1 and 8.0.5.2, the Action Mailbox Mailgun ingress authenticates a request with an HMAC of the timestamp and token parameters concatenated without a separator, and ActionMailbox::Ingresses::Mailgun::InboundEmailsController::Authenticator#recent? rejects only timestamps more than 2 minutes in the past. Because the signature does not fix the boundary between the two values, a captured signed request can be presented with a timestamp far in the future, which the ingress then accepts indefinitely. An attacker who obtains one signed Mailgun webhook request, but not the signing key, could submit arbitrary inbound email that Action Mailbox processes as genuine, possibly leading to forged messages attributed to the sender of the attacker's choosing. Applications that receive inbound email through the Action Mailbox Mailgun ingress are affected. This issue is fixed in versions 8.1.4.1 and 8.0.5.2.","ecosystems":["RubyGems"],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":0,"refs":[],"tier":"none_known"},"has_fix":true,"headline":"Action Mailbox: Possible signature replay in Action Mailbox Mailgun ingress","id":"CVE-2026-126068","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"RubyGems","product":null,"products":[],"type":null,"year":"2026"},"n_packages":2,"n_references":5,"next":{"headline":"Action View: Possible XSS vulnerability in Action View tag helpers","id":"CVE-2026-126069"},"nickname":null,"packages":[{"ecosystem":"RubyGems","fixed":["8.0.5.2"],"introduced":["0"],"last_affected":[],"package":"actionmailbox","purl":null,"source":"GHSA-5957-c7qm-m469"},{"ecosystem":"RubyGems","fixed":["8.1.4.1"],"introduced":["8.1.0.beta1"],"last_affected":[],"package":"actionmailbox","purl":null,"source":"GHSA-5957-c7qm-m469"}],"prev":{"headline":"Action Pack: Missing SameSite attribute on session cookies from Action Pack session stores","id":"CVE-2026-126067"},"products":["rails"],"published":"2026-11-10","related":[],"sources":[{"class":"attribution","licence":"CVE Terms of Use (MITRE)","name":"CVE List","prefix":"CVE"},{"class":"attribution","licence":"CC BY 4.0","name":"GitHub Advisory Database","prefix":"GHSA"},{"class":"attribution","licence":"CWE Terms of Use","name":"CWE (MITRE)"},{"class":"attribution","licence":"FIRST CVSS licence","name":"CVSS (FIRST)"}],"ssvc":{"automatable":"no","exploitation":"none","technical_impact":"partial"},"state":"PUBLISHED","updated":"2026-11-10","vendors":["rails"]},"summary":null,"url":"https://insights.sbomify.com/CVE-2026-126068/"}