EUVD-2026-77436
GHSA-27w8-c924-2678
Severity by source
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Network-reachable parser flaw requiring low privileges (authenticated submission); limited C/I/A impact as DoS and minor memory corruption in an embedded scripting context.
Primary rating from Vendor (VulDB).
CVSS VectorVendor: VulDB
Lifecycle Timeline
6DescriptionCVE.org
A weakness has been identified in marcobambini Gravity up to 0.9.7. The impacted element is an unknown function of the file src/utils/gravity_json.c of the component JSON parser. This manipulation causes memory corruption. The attack is possible to be carried out remotely. The exploit has been made available to the public and could be used for attacks. Upgrading to version 0.9.8 is sufficient to resolve this issue. Patch name: 9b337c3eae5833c3956bed1fc01c21c14fd443f2. It is suggested to upgrade the affected component.
AnalysisAI
Memory corruption in marcobambini Gravity scripting language versions 0.9.0 through 0.9.7 allows remote attackers with low-privilege access to trigger undefined behavior via crafted JSON input processed by gravity_json.c, potentially causing a crash or exploitable memory state in embedding applications. The root cause is a two-pass JSON parser design flaw where u.object.values is used as a size counter during the first pass but incremented with pointer arithmetic on a null pointer - undefined behavior per the C standard, confirmed to trap under -fsanitize=undefined. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires that the host application exposes Gravity's JSON parser or bytecode loader (gravity_vm_loadbuffer) to attacker-controlled input - this is a design choice of the embedding application, not a default network-exposed service. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 4.0 vector (AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L) correctly positions this as a low-complexity, network-reachable flaw requiring low privileges, with limited confidentiality, integrity, and availability impact - aligned with a scenario where Gravity is embedded in a service that exposes JSON parsing to authenticated users. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | Full exploit scenario with step-by-step reproduction available after sign-in. |
| Remediation | Upgrade Gravity to version 0.9.8, which incorporates commit 9b337c3eae5833c3956bed1fc01c21c14fd443f2 as confirmed by the upstream release at https://github.com/marcobambini/gravity/releases/tag/0.9.8 and the associated pull request https://github.com/marcobambini/gravity/pull/451. … Detailed patch versions, workarounds, and compensating controls in full report. |
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Same weakness CWE-119 – Buffer Overflow
View allSame technique Buffer Overflow
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External POC / Exploit Code
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