CVE-2025-7707: The llama_index library version 0.12.33 sets the NLTK data directory to a subdirectory of the codebase by defa

Routine

HIGH 7.8UPGRADE

CVE-2025-7707 is a high-severity flaw (CVSS 7.8) affecting llamaindex. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

The llama_index library version 0.12.33 sets the NLTK data directory to a subdirectory of the codebase by default, which is world-writable in multi-user environments. This configuration allows local users to overwrite, delete, or corrupt NLTK data files, leading to potential denial of service, data tampering, or privilege escalation. The vulnerability arises from the use of a shared cache directory instead of a user-specific one, making it suscep

Why this priority

High severity
Public exploit reference

A fixed release or distro patch exists.

Risk facts

CVSS score	7.8 (High)
Attack vector	Local
Attack complexity	Low
Privileges needed	Low
User interaction	None
EPSS exploit chance	0.2% (top 92%)
CISA exploited list	No
Weakness	CWE-377
Published	2025-10-13
Last modified	2026-10-08

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

Last updated 2026-10-08 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2025-10-13 17:15 UTCPublished CVE record published
2026-10-08 12:10 UTCUpdated Record last modified

llamaindex llamaindex UPGRADE

Affected: >= 0.12.33 and < 0.13.0

Fixed in: 0.13.0

Safe to downgrade to: a release before 0.12.33

1. Check installed version

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

2. UPGRADE to 0.13.0 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade llamaindex

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade llamaindex

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

3. If no update is available yet, DOWNGRADE to a release before 0.12.33 (Debian / Ubuntu)

apt-cache madison llamaindex sudo apt install llamaindex=<VERSION_BEFORE_0.12.33> sudo apt-mark hold llamaindex

3. If no update is available yet, DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list llamaindex sudo dnf downgrade llamaindex-<VERSION_BEFORE_0.12.33> 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-2025-7707?

llamaindex: upgrade to 0.13.0. Exact commands for each OS are on this page.

Is CVE-2025-7707 being exploited?

CVE-2025-7707 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-2025-7707 affect?

CVE-2025-7707 affects llamaindex. Severity is high (CVSS 7.8). The llama_index library version 0.12.33 sets the NLTK data directory to a subdirectory of the codebase by default, which is world-writable in multi-user environments. This configuration allows local users to overwrite, delete, or corrupt NL

How urgent is CVE-2025-7707?

Priority 34/100. High severity; Public exploit reference

Software pages

OpenAI and LLM tools vulnerabilities

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References

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