PYSEC-2026-1996 Decompression-bomb safeguards bypassed when following HTTP redirects (streaming API)

Impact urllib3's streaming API 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 decoding or decompression based on the HTTP Content-Encoding header e.g., gzip,...

PYSEC-2026-1101 AIOHTTP's HTTP Parser auto_decompress feature is vulnerable to zip bomb

Summary A zip bomb can be used to execute a DoS against the aiohttp server. Impact An attacker may be able to send a compressed request that when decompressed by aiohttp could exhaust the host's memory. ------ Patch: https://github.com/aio-libs/aiohttp/commit/2b920c39002cee0ec5b402581779bbaaf7c91...

PYSEC-2026-1994 urllib3 streaming API improperly handles highly compressed data

Impact urllib3's streaming API 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. When streaming a compressed response, urllib3 can perform decoding or decompression based on the HTTP...

urllib3 allows an unbounded number of links in the decompression chain

Impacturllib3 supports chained HTTP encoding algorithms for response content according to RFC 9110 e.g., Content-Encoding: gzip, zstd.However, the number of links in the decompression chain was unbounded allowing a malicious server to insert a virtually unlimited number of compression steps leadi...

PYSEC-2026-1998 urllib3 allows an unbounded number of links in the decompression chain

Impact urllib3 supports chained HTTP encoding algorithms for response content according to RFC 9110 e.g., Content-Encoding: gzip, zstd. However, the number of links in the decompression chain was unbounded allowing a malicious server to insert a virtually unlimited number of compression steps...

urllib3 streaming API improperly handles highly compressed data

Impacturllib3's streaming API 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.When streaming a compressed response, urllib3 can perform decoding or decompression based on the HTTP...

PYSEC-2026-1227 Bugsink is vulnerable to unauthenticated remote DoS via crafted Brotli input (via CPU)

Impact In affected versions, a specially crafted Brotli-compressed envelope can cause Bugsink to spend excessive CPU time in decompression, leading to denial of service. This can be done if the DSN is known, which it is in many common setups JavaScript, Mobile Apps. Patches Patched in Bugsink 2.0...

Bugsink is vulnerable to unauthenticated remote DoS via crafted Brotli input (via CPU)

ImpactIn affected versions, a specially crafted Brotli-compressed envelope can cause Bugsink to spend excessive CPU time in decompression, leading to denial of service.This can be done if the DSN is known, which it is in many common setups JavaScript, Mobile Apps. PatchesPatched in Bugsink 2.0.6...

Scrapy is vulnerable to a denial of service (DoS) attack due to flaws in brotli decompression implementation

Scrapy versions up to 2.13.3 are vulnerable to a denial of service DoS attack due to a flaw in its brotli decompression implementation. The protection mechanism against decompression bombs fails to mitigate the brotli variant, allowing remote servers to crash clients with less than 80GB of...

PYSEC-2026-1202 Authlib : JWE zip=DEF decompression bomb enables DoS

Summary Authlib’s JWE zip=DEF path performs unbounded DEFLATE decompression. A very small ciphertext can expand into tens or hundreds of megabytes on decrypt, allowing an attacker who can supply decryptable tokens to exhaust memory and CPU and cause denial of service. Details - Affected component...

Authlib : JWE zip=DEF decompression bomb enables DoS

SummaryAuthlib’s JWE zip=DEF path performs unbounded DEFLATE decompression. A very small ciphertext can expand into tens or hundreds of megabytes on decrypt, allowing an attacker who can supply decryptable tokens to exhaust memory and CPU and cause denial of service. Details- Affected component:...

OpenEXR Out of Bounds Heap Read due to Bad Pointer Arithmetic in LossyDctDecoder_execute

SummaryThe OpenEXRCore code is vulnerable to a heap-based buffer overflow during a read operation due to bad pointer math when decompressing DWAA-packed scan-line EXR files with a maliciously forged chunk. DetailsIn the LossyDctDecoderexecute function from src/lib/OpenEXRCore/internaldwadecoder.h...

GO-2026-5778 Rekor has an OOM Condition due to Unbounded gzip Decompression in Alpine APK Parsing Logic in github.com/sigstore/rekor

Rekor has an OOM Condition due to Unbounded gzip Decompression in Alpine APK Parsing Logic in github.com/sigstore/rekor...

SUSE CVE-2026-54060

Pillow is a Python imaging library. Prior to 12.3.0, PIL/FontFile.py FontFile.compile assembled per-glyph images into a combined bitmap with Image.new"1", xsize, ysize without calling Image.decompressionbombcheck, allowing a font to trigger excessive allocation during conversion or saving. This...

SUSE CVE-2026-55379

Pillow is a Python imaging library. Prior to 12.3.0, PIL/BdfFontFile.py bdfchar read the BBX width and height field from a BDF font file and passed attacker-controlled dimensions to Image.new without calling Image.decompressionbombcheck, bypassing Pillow's documented decompression bomb protection...

Scrapy decompression bomb vulnerability

ImpactScrapy limits allowed response sizes by default through the DOWNLOADMAXSIZE and DOWNLOADWARNSIZE settings.However, those limits were only being enforced during the download of the raw, usually-compressed response bodies, and not during decompression, making Scrapy vulnerable to decompressio...

PYSEC-2026-1907 Scrapy decompression bomb vulnerability

Impact Scrapy limits allowed response sizes by default through the DOWNLOADMAXSIZE and DOWNLOADWARNSIZE settings. However, those limits were only being enforced during the download of the raw, usually-compressed response bodies, and not during decompression, making Scrapy vulnerable to...

CLSA-2026-1783417026 gzip: Fix of CVE-2026-41992

CVE-2026-41992: Fix global buffer overflow in LZH decompression caused by reuse of shared decode tables...

CLSA-2026-1783416812 gzip: Fix of CVE-2026-41992

CVE-2026-41992: Fix global buffer overflow in LZH decompression caused by reuse of shared decode tables...

Important: docker

Issue Overview: x509.Certificate.VerifyHostname previously called matchHostnames in a loop over all DNS Subject Alternative Name SAN entries. This caused strings.Splithost, "." to execute repeatedly on the same input hostname. With a large DNS SAN list, verification costs scaled quadratically bas...