CVE WatchSep 22, 2026

CVE-2026-89420

Improper Validation of Specified Quantity in Input in ZenHive mpp allows a client holding an open payment channel to obtain paid resources w

CVSS

—

No CVSS

EPSS

—

KEV

—

Exploit Today

0-100

Published: Sep 22, 2026 · Last modified: Sep 22, 2026 · CWE-1284

EPSS · 30d

Not enough EPSS history yet.

Technical description

Improper Validation of Specified Quantity in Input in ZenHive mpp allows a client holding an open payment channel to obtain paid resources without being charged. MPP.Session.Actions.accept_voucher/3 in lib/mpp/session/actions.ex treats a voucher whose cumulativeAmount equals the channel's already-accepted cumulative amount as an idempotent success, returning the channel unchanged without calling maybe_spend/2. The credential verifies, the protected resource is served, and spent and units stay where they were. Because the server issues a fresh challenge per request and the credential replay store keys on challenge id and payload, the same signed voucher can be re-presented under every new challenge, so one paid voucher yields an unbounded number of paid units. The path is reachable from any method built on MPP.Session.Method through the Plug, MCP, JSON-RPC and WebSocket transports. This issue affects mpp: from 0.14.0 before 0.16.2.

Official references

Related CVEs

CVECVSSEPSSKEVRExploitTitleMod.

CVE-2026-933457.5 HIG

—

——0MikroTik RouterOS before 7.25beta4 contains an improper input validation vulnerability in the labelled-VPN NLRI iterators of the routing service that allows an unauthenticated on-path attacker to crash the BGP service by sending a malformed MP_REACH_NLRI UPDATE message with a prefix-length value below the minimum valid for a labelled-VPN NLRI, which passes validation while describing a route with a negative-length address portion. Attackers can repeatedly send a single BGP UPDATE packet carrying a VPNv4 or VPNv6 NLRI with an out-of-bounds prefix-length to indefinitely hold down the BGP plane, causing session termination without a NOTIFICATION and triggering a service malfunction on the device.5h CVE-2026-768995.7 MED

23.2%

——7CordysCRM is an open source AI-powered customer relationship management system that supports private deployment. From 1.7.0 until 1.7.4, POST /account-pool/page allows an authenticated caller with MODULE_SETTING_UPDATE to place an arbitrary database function in SortRequest.name because CustomerPoolController.page omits Spring request validation, SortRequest.getName relies on an incomplete blacklist, and the CommonMapper.xml sort fragment inserts ${sortName} into an ORDER BY clause. Functions such as extractvalue and updatexml bypass the blacklist and can expose database values through an error oracle when the query returns at least one row. This issue is fixed in version 1.7.4.4d CVE-2026-937497.5 HIG

28.8%

——9source-map-js through 1.2.1 fails to validate the per-section offset line value in indexed source maps, allowing attackers to specify arbitrary numeric values. Attackers can supply extremely large offset line values that cause synchronous event loop blocking for extended periods, preventing the service from handling other requests.8h CVE-2025-361785.4 MED

27.9%

——8IBM Controller 11.0.0 through 11.0.1 FP7, and 11.1.0 through 11.1.3 FP1 could allow an authenticated user to bypass input validation due to improper validation of client-side input of file size.4d CVE-2026-48977—

22.5%

——7OpenSlide is a C library for reading whole slide image files. From 3.4.1 until 4.0.1, OpenSlide's parse_level0_xml() processing in src/openslide-vendor-ventana.c accepts nonpositive row or column tile counts from a crafted Ventana BIF file. The invalid counts produce attacker-controlled relative memory offsets and allow arbitrary values to be written at those offsets, affecting all supported platforms and configurations and resulting in a crash or potential arbitrary code execution. This issue is fixed in version 4.0.1.4d CVE-2026-930156.3 MED

15.8%

——5BlueKitchen BTstack through 1.8.2 fails to validate the peer-reported endpoint count against table bounds in A2DP stream endpoint discovery. A bonded peer can send an AVDTP DISCOVER response with more endpoints than the fixed table holds, causing out-of-bounds writes that corrupt adjacent static objects and crash the process or sever event delivery.5d