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    CVE-2026-76239

    Stigmem before 0.9.0a11 fails to validate the delivery_address parameter when creating webhook subscriptions, allowing authenticated users to specify internal loopback and private network destinations. Attackers can trigger matching fact-change events to cause the Stigmem server to issue server-side HTTP POST requests to internal services, enabling blind SSRF attacks against localhost and private network endpoints.

    Published:Aug 19, 2026
    Last Modified:Aug 20, 2026
    EPS:Aug 19, 2026
    EPSS Score:
    CVSS Score:6.3

    Affected Products

    Vendor
    Eidetic-labs
    Product
    Stigmem

    Exploits

    No exploit reference

    Common Attack Pattern Enumeration and Classification (CAPEC)

    CAPEC-664 Server Side Request Forgery

    Related CVEs

    CVE-2026-76245 (CVSS 7.1) — stigmem (pip package stigmem-node) version 0.9.0a1 contains a timestamp-handling mismatch in federation peer-t…
    CVE-2026-76244 (CVSS 9.1) — stigmem-node contains an insecure default configuration vulnerability that allows federation traffic to traver…
    CVE-2026-76243 (CVSS 9.2) — stigmem versions before 0.9.0a2 allow unauthenticated access when authentication is disabled on non-loopback d…
    CVE-2026-76242 (CVSS 9.1) — stigmem-node 0.9.0a1 accepts federation peer key material during peer registration without a separate administ…
    CVE-2026-76241 (CVSS 7.3) — stigmem-node 0.9.0a1 allows plugin signature enforcement to be disabled via a single configuration flag withou…
    CVE-2026-76240 (CVSS 7.5) — stigmem-node 0.9.0a1 interpolates Postgres backend schema identifiers into SQL strings without defensive quoti…
    CVE-2026-76238 (CVSS 7.2) — stigmem versions before 0.9.0a12 contain a broken object level authorization vulnerability in the decay sweep …
    CVE-2026-76237 (CVSS 8.6) — stigmem-node before 0.9.0a12 contains a broken object level authorization (cross-tenant BOLA) vulnerability in…
    CVE-2026-76236 (CVSS 7.2) — stigmem-node before 0.9.0a12 contains a cross-tenant broken object level authorization (BOLA) flaw in the RTBF…

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High