CVE-2024-12704: A vulnerability in the LangChainLLM class of the run-llama/llama_index repository, version v0.12.5, allows for

This week

HIGH 7.5REMOTEDOWNGRADE

CVE-2024-12704 is a high-severity flaw (CVSS 7.5) affecting llamaindex. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

A vulnerability in the LangChainLLM class of the run-llama/llama_index repository, version v0.12.5, allows for a Denial of Service (DoS) attack. The stream_complete method executes the llm using a thread and retrieves the result via the get_response_gen method of the StreamingGeneratorCallbackHandler class. If the thread terminates abnormally before the _llm.predict is executed, there is no exception handling for this case, leading to an infinite

Why this priority

High severity
Public exploit reference
Remotely exploitable, no login, no user action

No fix is published yet: follow the downgrade or mitigation steps.

Risk facts

CVSS score	7.5 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	0.8% (top 42%)
CISA exploited list	No
Weakness	CWE-835
Published	2025-03-20
Last modified	2026-06-17

Publisher (CNA): huntr.dev · Vendor: llamaindex

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2025-03-20 10:15 UTCPublished CVE record published
2026-06-17 07:00 UTCUpdated Record last modified

llamaindex llamaindex DOWNGRADE

Affected: 0.12.5

Fixed in: no fixed release known

Safe to downgrade to: a release before 0.12.5

1. Check installed version

apt-cache policy llamaindex || rpm -q llamaindex || llamaindex --version

2. No fixed release: DOWNGRADE to a release before 0.12.5 (Debian / Ubuntu)

apt-cache madison llamaindex sudo apt install llamaindex=<VERSION_BEFORE_0.12.5> sudo apt-mark hold llamaindex

2. No fixed release: DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list llamaindex sudo dnf downgrade llamaindex-<VERSION_BEFORE_0.12.5> sudo dnf versionlock add llamaindex

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2024-12704?

llamaindex: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2024-12704 being exploited?

CVE-2024-12704 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2024-12704 affect?

CVE-2024-12704 affects llamaindex. Severity is high (CVSS 7.5). A vulnerability in the LangChainLLM class of the run-llama/llama_index repository, version v0.12.5, allows for a Denial of Service (DoS) attack. The stream_complete method executes the llm using a thread and retrieves the result via the get

How urgent is CVE-2024-12704?

Priority 51/100. High severity; Public exploit reference; Remotely exploitable, no login, no user action

Software pages

OpenAI and LLM tools vulnerabilities

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References

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