{"answers":{"affected":"3 open source packages ship an affected version, including github.com/knadh/listmonk. It affects 1 product.","exploited":"It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-34828 exists.","fix":"Upgrade github.com/knadh/listmonk to 1.1.1-0.20260329113754-1b5e8d38c778 or later.","what":"CVE-2026-34828 is a high-severity vulnerability in knadh listmonk, published on 2 Apr 2026. Any signed-in user can exploit it over the network, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2026-34828 and fix it if it is affected.\n\nWhat it is: CVE-2026-34828 is a high-severity vulnerability in knadh listmonk, published on 2 Apr 2026. Any signed-in user can exploit it over the network, with no action from the victim.\nExploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-34828 exists.\n\nAffected packages and fixed versions:\n- github.com/knadh/listmonk (Go): affected from 1.1.1-0.20241028090858-319053dd7a90; fixed in 1.1.1-0.20260329113754-1b5e8d38c778\n- github.com/knadh/listmonk (Go): affected from 1.1.1-0.20241028090858-319053dd7a90; fixed in 1.1.1-0.20260329113754-1b5e8d38c778\n- github.com/knadh/listmonk (Go): affected from 1.1.1-0.20241028090858-319053dd7a90; fixed in 1.1.1-0.20260329113754-1b5e8d38c778\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-2026-34828/ (Markdown: https://insights.sbomify.com/CVE-2026-34828/index.md)","id":"CVE-2026-34828","markdown":"https://insights.sbomify.com/CVE-2026-34828/index.md","name":"CVE-2026-34828","record":{"aliases":["GHSA-h5j9-cvrw-v5qh","GO-2026-5414"],"analysis":{"component_type":"web_application","fix_type":"upgrade","impacts":["account_takeover"],"network_reachable":"yes","non_default_config":false,"product_category":"Newsletter manager","requires_auth":"low_privilege","summary":"Attackers with stolen session cookies retain access after password changes, bypassing session invalidation in listmonk.","user_interaction":"not_required","vuln_class":"security_feature_bypass"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"GitHub_M","cpe":[{"product":"listmonk","vendor":"nadh"}],"cvss":{"score":7.1,"severity":"high","source":"cna","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:N","version":"3.1"},"cwes":[{"id":"CWE-613","name":"DEPRECATED: Insufficient Session Expiration"}],"description":"listmonk is a standalone, self-hosted, newsletter and mailing list manager. From version 4.1.0 to before version 6.1.0, a session management vulnerability allows previously issued authenticated sessions to remain valid after sensitive account security changes, specifically password reset and password change. As a result, an attacker who has already obtained a valid session cookie can retain access to the account even after the victim changes or resets their password. This weakens account recovery and session security guarantees. This issue has been patched in version 6.1.0.","ecosystems":["Go"],"exploits":{"exploitdb":0,"first_seen":"2026-04-02","github_poc":1,"max_poc_stars":0,"metasploit":0,"nuclei":0,"refs":[{"date":"2026-04-02T03:25:32Z","kind":"github_poc","ref":"https://github.com/0xmrma/CVE-2026-34828","stars":0,"title":"listmonk’s Session Persistence After Password Reset and Password Change"}],"tier":"weaponised"},"has_fix":true,"headline":"listmonk: Active sessions remain valid after password reset and password change","id":"CVE-2026-34828","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"Go","product":null,"products":[],"type":"security_feature_bypass","year":"2026"},"n_packages":3,"n_references":3,"next":{"headline":"Rack: Denial of Service via Unbounded Multipart File Upload Without Content-Length","id":"CVE-2026-34829"},"packages":[{"ecosystem":"Go","fixed":["1.1.1-0.20260329113754-1b5e8d38c778"],"introduced":["1.1.1-0.20241028090858-319053dd7a90"],"last_affected":[],"package":"github.com/knadh/listmonk","purl":null,"source":"GHSA-h5j9-cvrw-v5qh"},{"ecosystem":"Go","fixed":["1.1.1-0.20260329113754-1b5e8d38c778"],"introduced":["1.1.1-0.20241028090858-319053dd7a90"],"last_affected":[],"package":"github.com/knadh/listmonk","purl":"pkg:golang/github.com/knadh/listmonk","source":"GHSA-h5j9-cvrw-v5qh"},{"ecosystem":"Go","fixed":["1.1.1-0.20260329113754-1b5e8d38c778"],"introduced":["1.1.1-0.20241028090858-319053dd7a90"],"last_affected":[],"package":"github.com/knadh/listmonk","purl":"pkg:golang/github.com/knadh/listmonk","source":"GO-2026-5414"}],"prev":{"headline":"Rack: Algorithmic-Complexity DoS in Rack::Multipart::Parser","id":"CVE-2026-34827"},"products":["listmonk"],"published":"2026-04-02","related":[{"cvss_score":9.1,"headline":"listmonk's Sprig template Injection vulnerability leads to reading of Environment Variable for low privilege user","id":"CVE-2025-49136","kev_date_added":null,"published":"2025-06-09"},{"cvss_score":8.6,"headline":"listmonk Vulnerable to CSRF to XSS Chain That Can Lead to Admin Account Takeover","id":"CVE-2025-58430","kev_date_added":null,"published":"2025-09-09"},{"cvss_score":6.5,"headline":"SQL injection in n/a","id":"CVE-2025-46011","kev_date_added":null,"published":"2025-06-04"},{"cvss_score":5.4,"headline":"listmonk: Broken Access Control in CSV Import (Unauthorized List Assignment)","id":"CVE-2026-34584","kev_date_added":null,"published":"2026-04-02"},{"cvss_score":5.4,"headline":"listmonk Vulnerable to Stored XSS Leading to Admin Account Takeover","id":"CVE-2026-21483","kev_date_added":null,"published":"2026-01-02"}],"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":"CC BY 4.0","name":"Go Vulnerability Database","prefix":"GO"},{"class":"attribution","licence":"US public information, NVD API terms","name":"NVD"},{"class":"attribution","licence":"CWE Terms of Use","name":"CWE (MITRE)"},{"class":"attribution","licence":"FIRST CVSS licence","name":"CVSS (FIRST)"},{"class":"open","licence":"CC0","name":"PoC-in-GitHub"}],"ssvc":{"automatable":"no","exploitation":"poc","technical_impact":"partial"},"state":"PUBLISHED","updated":"2026-04-03","vendors":["knadh"]},"summary":"Attackers with stolen session cookies retain access after password changes, bypassing session invalidation in listmonk.","url":"https://insights.sbomify.com/CVE-2026-34828/"}