PT-2026-40590 · Klever-Go · Klever-Go

Fbsobreira · Published 2026-05-13 · Updated 2026-06-25 · CVE-2026-44697

Positive Technologies (AI Summary)

CVSS v3.1

8.6

High

Base vector

AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H

Name of the Vulnerable Software and Affected Versions Klever-Go versions prior to 1.7.17

Description A remote, unauthenticated denial-of-service issue exists in the Batch.Decompress function within data/batch/batch.go. This allows any peer participating in a topic served by MultiDataInterceptor to trigger multi-gigabyte heap allocations on a receiving node using a gossip payload smaller than 50 KiB. The issue stems from an unbounded io.ReadAll operation in the decompressGzip function and a lack of validation for the ba.DataSize variable during decompression. A single malicious packet can cause a validator to crash due to out-of-memory (OOM) conditions, and a fleet-wide attack can compromise chain liveness.

Recommendations Update to version 1.7.17.

Exploit

Fix

DoS

Allocation of Resources Without Limits

Weakness Enumeration

CWE-409

CWE-770

Related Identifiers

CVE-2026-44697

GHSA-87M7-QFFR-542V

GO-2026-5246

Affected Products

Klever-Go

References · 11

• 🔥 https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/44xxx/CVE-2026-44697.json · Exploit
• 🔥 https://github.com/klever-io/klever-go/security/advisories/GHSA-87m7-qffr-542v · Exploit
• https://osv.dev/vulnerability/GHSA-87m7-qffr-542v · Vendor Advisory
• https://osv.dev/vulnerability/GO-2026-5246 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-44697 · Security Note
• https://osv.dev/vulnerability/CVE-2026-44697 · Vendor Advisory
• https://github.com/klever-io/klever-go · Note
• https://twitter.com/CVEnew/status/2060839333364433103 · Twitter Post
• https://t.me/CVEtracker/55271 · Telegram Post
• https://t.me/cveNotify/165582 · Telegram Post
• https://twitter.com/infoflowcloud/status/2060840259227714015 · Twitter Post