EUVD-2026-34991
GHSA-25jx-vqmc-84rq
Severity by source
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/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
Primary rating from NVD · only source for this CVE.
CVSS VectorNVD
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/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
Lifecycle Timeline
3DescriptionCVE.org
A flaw has been found in Boost Serialization up to 1.91. The impacted element is an unknown function. This manipulation causes improper validation of specified type of input. It is possible to initiate the attack remotely. The exploit has been published and may be used. The maintainer was notified on Aug 2025 and a disclosure deadline was set for 90 days. The maintainer acknowledged but postponed indefinitely citing time concerns. No patch is currently available and the disclosure deadline has expired.
AnalysisAI
Improper input type validation in Boost Serialization versions up to 1.91 allows remote attackers to send maliciously crafted serialized data that triggers limited compromise of confidentiality, integrity, and availability. Publicly available exploit code exists (published as a GitHub gist by researcher TrebledJ), and the maintainer has indefinitely postponed a fix after the 90-day disclosure deadline expired, leaving downstream C++ applications using Boost Serialization unpatched. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires that the target application uses an affected Boost Serialization version (≤1.91) AND exposes a deserialization code path to attacker-controlled archive data - Boost Serialization is a library, not a network service, so the network attack vector in CVSS reflects the downstream application's exposure, not the library's. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 3.1 base score of 7.3 (AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L) signals a network-reachable, low-complexity, unauthenticated attack with limited impact across CIA - consistent with information disclosure or partial corruption rather than full RCE. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | An attacker identifies an application (for example a network daemon, RPC service, or file processor) that accepts Boost-serialized payloads from external sources and submits a crafted archive whose type metadata bypasses the library's type validation. Because publicly available PoC code exists in the referenced GitHub gist, an attacker can adapt it to trigger information disclosure or limited integrity/availability impact against the target process without authentication or user interaction. |
| Remediation | No vendor-released patch identified at time of analysis - the Boost Serialization maintainer acknowledged the report but indefinitely postponed a fix after the 90-day disclosure deadline expired, so consumers cannot upgrade to a fixed release. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours: Inventory all C++ applications and services using Boost Serialization versions up to 1.91 and prioritize those accepting deserialized data from untrusted sources. …
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