{"description":"Trending threats, MITRE ATT\u0026CK coverage, and detection metadata. Fed continuously.","feed_url":"https://feed.craftedsignal.io/products/stigmem-node/feed.json","home_page_url":"https://feed.craftedsignal.io/","items":[{"_cs_actors":[],"_cs_cpes":[],"_cs_cves":[],"_cs_exploited":false,"_cs_has_poc":false,"_cs_poc_references":[],"_cs_products":["stigmem-node"],"_cs_severities":["medium"],"_cs_tags":["stigmem","token-validation","authentication"],"_cs_type":"advisory","_cs_vendors":["Eidetic Labs"],"content_html":"\u003cp\u003eA vulnerability exists in stigmem-node versions prior to 0.9.0a2 where federation peer token timestamp handling can cause valid peer tokens to be incorrectly evaluated as expired. This is due to a mismatch in how token timestamps are processed. An attacker could exploit this by leveraging federation peer authentication paths in vulnerable versions of stigmem-node, disrupting availability and reliability. This impacts deployments where Stigmem nodes use federation peer authentication. The vulnerability was patched in version 0.9.0a2.\u003c/p\u003e\n\u003ch2 id=\"attack-chain\"\u003eAttack Chain\u003c/h2\u003e\n\u003col\u003e\n\u003cli\u003eAn attacker attempts to authenticate with a Stigmem node using a valid federation peer token.\u003c/li\u003e\n\u003cli\u003eThe Stigmem node, running a vulnerable version (prior to 0.9.0a2), receives the token.\u003c/li\u003e\n\u003cli\u003eThe timestamp within the token is processed using an incorrect validation path.\u003c/li\u003e\n\u003cli\u003eDue to this incorrect handling, the token\u0026rsquo;s timestamp is misinterpreted.\u003c/li\u003e\n\u003cli\u003eThe Stigmem node determines the token to be expired, even if it is still valid.\u003c/li\u003e\n\u003cli\u003eAuthentication fails, preventing the peer from accessing the Stigmem node\u0026rsquo;s resources.\u003c/li\u003e\n\u003cli\u003eLegitimate federation flows are disrupted due to repeated authentication failures.\u003c/li\u003e\n\u003cli\u003eThe attacker achieves a denial-of-service effect by preventing valid peers from authenticating.\u003c/li\u003e\n\u003c/ol\u003e\n\u003ch2 id=\"impact\"\u003eImpact\u003c/h2\u003e\n\u003cp\u003eThis vulnerability primarily impacts the availability and reliability of authenticated federation flows. Successful exploitation can prevent legitimate peers from authenticating with Stigmem nodes, disrupting normal operations. This could lead to service outages or impaired functionality for users relying on federated access. While the report doesn\u0026rsquo;t specify the number of affected organizations, any deployment using stigmem-node versions prior to 0.9.0a2 and relying on federation peer authentication is potentially vulnerable.\u003c/p\u003e\n\u003ch2 id=\"recommendation\"\u003eRecommendation\u003c/h2\u003e\n\u003cul\u003e\n\u003cli\u003eUpgrade stigmem-node to version 0.9.0a2 or later to remediate the vulnerability. Use \u003ccode\u003epip install --upgrade --pre stigmem-node\u003c/code\u003e or \u003ccode\u003epip install --upgrade --pre 'stigmem[node]'\u003c/code\u003e as detailed in the advisory.\u003c/li\u003e\n\u003cli\u003ePrior to upgrading, avoid mixing peer-token minting paths and restrict federation use to tightly controlled peers, as suggested in the workaround section.\u003c/li\u003e\n\u003cli\u003eMonitor stigmem-node logs for authentication failures involving federation peer tokens. While no specific rule is provided, look for errors related to token expiry.\u003c/li\u003e\n\u003cli\u003eEnable verbose logging to capture the details of the timestamp validation process. This may help diagnose issues and confirm the vulnerability.\u003c/li\u003e\n\u003c/ul\u003e\n","date_modified":"2026-05-29T22:15:47Z","date_published":"2026-05-29T22:15:47Z","id":"https://feed.craftedsignal.io/briefs/2026-05-stigmem-token-validation/","summary":"A timestamp handling issue in Stigmem-node's federation peer token validation could cause valid peer tokens to be incorrectly treated as expired, impacting availability and reliability of authenticated federation flows, affecting versions prior to 0.9.0a2.","title":"Stigmem-node Federation Peer Token Timestamp Validation Vulnerability","url":"https://feed.craftedsignal.io/briefs/2026-05-stigmem-token-validation/"}],"language":"en","title":"CraftedSignal Threat Feed — Stigmem-Node","version":"https://jsonfeed.org/version/1.1"}