CVE-2026-61732 Decepticon: Role-boundary forgery via ChatML special-token literals in web crawl output composed into LLM context
Attackers can execute arbitrary commands by injecting ChatML tokens into web crawl outputs, bypassing agent guardrails in Decepticon.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-61732?
CVE-2026-61732 is a critical code injection vulnerability in BitterSecurity Decepticon, published on 24 Sep 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
Decepticon is an autonomous hacking agent for red teams. Versions prior to 1.1.17 wrap web crawl results — the output of agent reconnaissance against target services — into LLM messages without neutralizing ChatML special-token literals. Under the BYOK (Bring Your Own Key) deployment model, users configure their own LLM credentials to any OpenAI-compatible endpoint. Most open-source and self-deployed model providers (vLLM, SGLang, Ollama, LM Studio, text-generation-webui, etc.) do not filter special-token literals from user content in their default configurations. Those literals are parsed into structural role-boundary token IDs, meaning an attacker string planted in a target web page forges a new operator turn the model treats as authoritative, bypassing Decepticon's agent guardrails and resulting in arbitrary command execution inside the Kali Linux sandbox. Version 1.1.17 patches the issue.
Weakness: CWE-74
Which versions are affected by CVE-2026-61732?
9 open source packages ship an affected version, including decepticon, decepticon-core and decepticon-sdk.
| Package | Affected | Fixed in |
|---|---|---|
decepticon PyPI | All versions | 1.1.17 |
decepticon PyPI | All versions | 1.1.17 |
decepticon PyPI | All versions | 1.1.17 |
decepticon-core PyPI | All versions | 1.1.17 |
decepticon-core PyPI | All versions | 1.1.17 |
decepticon-core PyPI | All versions | 1.1.17 |
3 more packages
decepticon-sdk PyPI | All versions | 1.1.17 |
decepticon-sdk PyPI | All versions | 1.1.17 |
decepticon-sdk PyPI | All versions | 1.1.17 |
How do I fix CVE-2026-61732?
Upgrade decepticon to 1.1.17 or later.
Upgrade, and never evaluate templates, expressions or code built from user input. More about Code injection.
Is CVE-2026-61732 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-61732 exists.
Public exploit code: 1 proofs of concept on GitHub.
Sources
Also known as GHSA-g5f9-3xfg-p9mf, PYSEC-2026-4032, PYSEC-2026-4033, PYSEC-2026-4034.