This PR contains the following updates: | Package | Change | [Age](https://docs.renovatebot.com/merge-confidence/) | [Confidence](https://docs.renovatebot.com/merge-confidence/) | |---|---|---|---| | [urllib3](https://redirect.github.com/urllib3/urllib3) ([changelog](https://redirect.github.com/urllib3/urllib3/blob/main/CHANGES.rst)) | `2.6.3` → `2.7.0` | ![age](https://developer.mend.io/api/mc/badges/age/pypi/urllib3/2.7.0?slim=true) | ![confidence](https://developer.mend.io/api/mc/badges/confidence/pypi/urllib3/2.6.3/2.7.0?slim=true) | --- > [!WARNING] > Some dependencies could not be looked up. Check the [Dependency Dashboard](../issues/357) for more information. --- ### urllib3: Decompression-bomb safeguards bypassed in parts of the streaming API [CVE-2026-44432](https://nvd.nist.gov/vuln/detail/CVE-2026-44432) / [GHSA-mf9v-mfxr-j63j](https://redirect.github.com/advisories/GHSA-mf9v-mfxr-j63j) <details> <summary>More information</summary> #### Details ##### Impact urllib3's [streaming API](https://urllib3.readthedocs.io/en/2.7.0/advanced-usage.html#streaming-and-i-o) is designed for the efficient handling of large HTTP responses by reading the content in chunks, rather than loading the entire response body into memory at once. urllib3 can perform decompression based on the HTTP `Content-Encoding` header (e.g., `gzip`, `deflate`, `br`, or `zstd`). When using the streaming API since version 2.6.0, the library decompresses only the necessary bytes, enabling partial content consumption. However, urllib3 before version 2.7.0 could still decompress the whole response instead of the requested portion in two cases: 1. During the second `HTTPResponse.read(amt=N)` call when the response was decompressed using the official [Brotli](https://pypi.org/project/brotli/) library. 2. When `HTTPResponse.drain_conn()` was called after the response had been read and decompressed partially (compression algorithm did not matter here). These issues could cause urllib3 to fully decode a small amount of highly compressed data in a single operation. This could result in excessive resource consumption (high CPU usage and massive memory allocation for the decompressed data; CWE-409) on the client side. ##### Affected usages Applications and libraries using urllib3 versions earlier than 2.7.0 may be affected when streaming compressed responses from untrusted sources in either of these cases, unless decompression is explicitly disabled: 1. A response encoded with `br` is read incrementally with at least two `HTTPResponse.read(amt=N)` or `HTTPResponse.stream(amt=N)` calls while using the official [Brotli](https://pypi.org/project/brotli/) library. 2. `HTTPResponse.drain_conn()` is called after response decompression has already started. ##### Remediation Upgrade to at least urllib3 version 2.7.0 in which the library: 1. Is more efficient for reads with Brotli. 2. Always skips decompression for `HTTPResponse.drain_conn()`. If upgrading is not immediately possible, the following workarounds may reduce exposure in specific cases: 1. For the Brotli-specific issue only, switch from [brotli](https://pypi.org/project/brotli/) to [brotlicffi](https://pypi.org/project/brotlicffi/) until you can upgrade urllib3; the official Brotli package is affected because of [https://github.com/google/brotli/issues/1396](https://redirect.github.com/google/brotli/issues/1396). 2. If your code explicitly calls `HTTPResponse.drain_conn()`, call `HTTPResponse.close()` instead when connection reuse is not important. ##### Credits The Brotli-specific issue was reported by @kimkou2024. `HTTPResponse.drain_conn()` inefficiency was reported by @Cycloctane. #### Severity - CVSS Score: 8.9 / 10 (High) - Vector String: `CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:H` #### References - [https://github.com/urllib3/urllib3/security/advisories/GHSA-mf9v-mfxr-j63j](https://redirect.github.com/urllib3/urllib3/security/advisories/GHSA-mf9v-mfxr-j63j) - [https://github.com/advisories/GHSA-mf9v-mfxr-j63j](https://redirect.github.com/advisories/GHSA-mf9v-mfxr-j63j) This data is provided by the [GitHub Advisory Database](https://redirect.github.com/advisories/GHSA-mf9v-mfxr-j63j) ([CC-BY 4.0](https://redirect.github.com/github/advisory-database/blob/main/LICENSE.md)). </details> --- ### Release Notes <details> <summary>urllib3/urllib3 (urllib3)</summary> ### [`v2.7.0`](https://redirect.github.com/urllib3/urllib3/blob/HEAD/CHANGES.rst#270-2026-05-07) [Compare Source](https://redirect.github.com/urllib3/urllib3/compare/2.6.3...2.7.0) \======================= ## Security Addressed high-severity security issues. Impact was limited to specific use cases detailed in the accompanying advisories; overall user exposure was estimated to be marginal. - Decompression-bomb safeguards of the streaming API were bypassed: 1. When `HTTPResponse.drain_conn()` was called after the response had been read and decompressed partially. 2. During the second `HTTPResponse.read(amt=N)` or `HTTPResponse.stream(amt=N)` call when the response was decompressed using the official `Brotli <https://pypi.org/project/brotli/>`\_\_ library. See `GHSA-mf9v-mfxr-j63j <https://github.com/urllib3/urllib3/security/advisories/GHSA-mf9v-mfxr-j63j>`\_\_ for details. - HTTP pools created using `ProxyManager.connection_from_url` did not strip sensitive headers specified in `Retry.remove_headers_on_redirect` when redirecting to a different host. (`GHSA-qccp-gfcp-xxvc <https://github.com/urllib3/urllib3/security/advisories/GHSA-qccp-gfcp-xxvc>`\_\_) ## Deprecations and Removals - Used `FutureWarning` instead of `DeprecationWarning` for better visibility of existing deprecation notices. Rescheduled the removal of deprecated features to version 3.0. (`#3763 <https://github.com/urllib3/urllib3/issues/3763>`\_\_) - Removed support for end-of-life Python 3.9. (`#3720 <https://github.com/urllib3/urllib3/issues/3720>`\_\_) - Removed support for end-of-life PyPy3.10. (`#4979 <https://github.com/urllib3/urllib3/issues/4979>`\_\_) - Bumped the minimum supported pyOpenSSL version to 19.0.0. (`#3777 <https://github.com/urllib3/urllib3/issues/3777>`\_\_) ## Bugfixes - Fixed a bug where `HTTPResponse.read(amt=None)` was ignoring decompressed data buffered from previous partial reads. (`#3636 <https://github.com/urllib3/urllib3/issues/3636>`\_\_) - Fixed a bug where `HTTPResponse.read()` could cache only part of the response after a partial read when `cache_content=True`. (`#4967 <https://github.com/urllib3/urllib3/issues/4967>`\_\_) - Fixed `HTTPResponse.stream()` and `HTTPResponse.read_chunked()` to handle `amt=0`. (`#3793 <https://github.com/urllib3/urllib3/issues/3793>`\_\_) - Updated `_TYPE_BODY` type alias to include missing `Iterable[str]`, matching the documented and runtime behavior of chunked request bodies. (`#3798 <https://github.com/urllib3/urllib3/issues/3798>`\_\_) - Fixed `LocationParseError` when paths resembling schemeless URIs were passed to `HTTPConnectionPool.urlopen()`. (`#3352 <https://github.com/urllib3/urllib3/issues/3352>`\_\_) - Fixed `BaseHTTPResponse.readinto()` type annotation to accept `memoryview` in addition to `bytearray`, matching the `io.RawIOBase.readinto` contract and enabling use with `io.BufferedReader` without type errors. (`#3764 <https://github.com/urllib3/urllib3/issues/3764>`\_\_) </details> --- ### Configuration 📅 **Schedule**: (UTC) - Branch creation - "" - Automerge - At any time (no schedule defined) 🚦 **Automerge**: Enabled. ♻ **Rebasing**: Whenever PR becomes conflicted, or you tick the rebase/retry checkbox. 🔕 **Ignore**: Close this PR and you won't be reminded about this update again. --- - [ ] If you want to rebase/retry this PR, check this box --- This PR was generated by [Mend Renovate](https://mend.io/renovate/). View the [repository job log](https://developer.mend.io/github/vortex-data/vortex).  Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>