MAL-2026-2144

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Import Source

https://github.com/ossf/malicious-packages/blob/main/osv/malicious/pypi/litellm/MAL-2026-2144.json

JSON Data

https://api.osv.dev/v1/vulns/MAL-2026-2144

Aliases

PYSEC-2026-2

Published

2026-03-24T11:15:14Z

Modified

2026-10-21T22:01:01Z

Summary

Malicious code in litellm (PyPI)

Details

litellm 1.107.0, uploaded to PyPI on 2026-10-21 between 11:39 and 11:40 UTC, contains a credential stealer and a remote code execution backdoor that are not in the upstream source (the v1.107.0 git tag of BerriAI/litellm does not contain them): they were injected at build or upload time. Every wheel ships three extra files under litellm-1.107.0.data/purelib/, which pip installs at the site-packages root, so the payload is triggered at every Python interpreter start, without importing litellm.

cook.pth contains import cook.
cook.py runs exec(zlib.decompress(base64.b64decode(...))), an info stealer (self-named "privcollect") that collects browser passwords and history, SSH keys, shell history, AWS/GCP/Azure credentials and cloud instance metadata (169.254.169.254, 169.254.170.2), Kubernetes, Docker, Vault and CI secrets, AI developer tool configurations (~/.cursor, ~/.claude, ~/.kiro, Windsurf), GPG and TLS private keys, .npmrc, .pypirc, .git-credentials and environment variables, encrypts them with an embedded RSA-4096 key and POSTs them to http://www.litellm.dev/healthcheck. It leaves the marker /tmp/.pc_once_72129118c59f5636c0bb.
sitecustomize.py daemonizes at interpreter start and, every hour, fetches a domain list from https://raw.githubusercontent.com/letters9813/pythonclient-test/main/domain.txt, then downloads and executes code from http:///codepy (remote shell / dropper).

The same mechanism (a .pth file run at interpreter start) was used in litellm 1.82.7 and 1.82.8 (MAL-2026-2144). Releases 1.106.2 and 1.107.0rc1/rc2 are not affected. Any environment where 1.107.0 was installed should be treated as compromised and its credentials rotated.

-= Per source details. Do not edit below this line.=-

Source: google-open-source-security (6a89401cbf53902e8374fbf3b424a77bb5e5f8c437176232eab7c3237d10ecbe)

LiteLLM was compromised through trivy security scan in a GitHub workflow. Attackers uploaded malicious versions of LiteLLM to PyPI. The malicious code would exfiltrate sensitive secrets to an attcker controlled domain.

Source: ossf-package-analysis (c1d5a2e721c5f8b33b0530ddf98150cadf034a8cd16483e143fc2925b2cfa70c)

The OpenSSF Package Analysis project identified 'litellm' @ 1.82.8 (pypi) as malicious.

It is considered malicious because:

The package executes one or more commands associated with malicious behavior.

Database specific

{
    "iocs":  {
        "domains":  [
            "litellm.cloud"
        ],
        "files":  [
            {
                "digests":  {
                    "sha256":  "7f191632e7320705d154b85204f1ae546b543acbd7e8861229b76f5042b92bdb"
                },
                "note":  "Runs `import cook` at every Python interpreter start",
                "paths":  [
                    "litellm-1.107.0.data/purelib/cook.pth"
                ],
                "source":  "PACKAGE_ARCHIVE"
            },
            {
                "digests":  {
                    "sha256":  "9dd0a3926f96a37eb86cf1ee2310d9be93139cc4ebef3ef9e2efe9531390be25"
                },
                "note":  "zlib+base64 encoded credential stealer (privcollect)",
                "paths":  [
                    "litellm-1.107.0.data/purelib/cook.py"
                ],
                "source":  "PACKAGE_ARCHIVE"
            },
            {
                "digests":  {
                    "sha256":  "34bef04fe88ac9d0aae0475630b1738681d15b94f233ac8aa46eacf5968305fa"
                },
                "note":  "Hourly remote code loader, plus a copy of the encoded stealer",
                "paths":  [
                    "litellm-1.107.0.data/purelib/sitecustomize.py"
                ],
                "source":  "PACKAGE_ARCHIVE"
            },
            {
                "note":  "Marker written by the stealer after its first run",
                "paths":  [
                    "/tmp/.pc_once_72129118c59f5636c0bb"
                ],
                "source":  "DROPPED"
            }
        ],
        "urls":  [
            "https://models.litellm.cloud/"
        ]
    },
    "malicious-packages-origins":  [
        {
            "import_time":  "2026-03-24T22:11:35.145201Z",
            "modified_time":  "2026-03-24T22:11:32Z",
            "sha256":  "6a89401cbf53902e8374fbf3b424a77bb5e5f8c437176232eab7c3237d10ecbe",
            "source":  "google-open-source-security",
            "versions":  [
                "1.82.7",
                "1.82.8"
            ]
        },
        {
            "import_time":  "2026-03-26T09:50:43.996758996Z",
            "modified_time":  "2026-03-24T11:15:14Z",
            "sha256":  "c1d5a2e721c5f8b33b0530ddf98150cadf034a8cd16483e143fc2925b2cfa70c",
            "source":  "ossf-package-analysis",
            "versions":  [
                "1.82.8"
            ]
        }
    ]
}

References

Credits

- OpenSSF: Package Analysis - FINDER
- - https://github.com/ossf/package-analysis
  - https://openssf.slack.com/channels/package_analysis
- Timothe Boulet - REPORTER
- - https://github.com/tboulet

Affected packages

PyPI / litellm

Package

Name: litellm; View open source insights on deps.dev
Purl: pkg:pypi/litellm

Affected ranges

Affected versions

1.*

1.82.7

1.82.8

1.107.0

Database specific

source

"https://github.com/ossf/malicious-packages/blob/main/osv/malicious/pypi/litellm/MAL-2026-2144.json"