CVE-2026-50285

Pomerium is an identity and context-aware access proxy. Prior to 0.32.8, decodeQueryStringV2 in pkg/hpke/url.go performs zstd decompression of attacker-controlled data without an output-memory limit when DecryptURLValues processes HPKE V2 values for Stateless.Callback in...

CVE-2026-50285 Pomerium: Pre-Auth Memory Exhaustion via Unbounded zstd Decompression in HPKE Callback

Pomerium is an identity and context-aware access proxy. Prior to 0.32.8, decodeQueryStringV2 in pkg/hpke/url.go performs zstd decompression of attacker-controlled data without an output-memory limit when DecryptURLValues processes HPKE V2 values for Stateless.Callback in...

CVE-2026-50285 Pomerium: Pre-Auth Memory Exhaustion via Unbounded zstd Decompression in HPKE Callback

Pomerium is an identity and context-aware access proxy. Prior to 0.32.8, decodeQueryStringV2 in pkg/hpke/url.go performs zstd decompression of attacker-controlled data without an output-memory limit when DecryptURLValues processes HPKE V2 values for Stateless.Callback in...

CVE-2026-50285

Pomerium (identity and context-aware access proxy) versions prior to 0.32.8 are vulnerable to a pre-auth denial of service in the stateless authentication flow. The decodeQueryStringV2 function in pkg/hpke/url.go performs zstd decompression without an output-memory limit before sender identity is...

EUVD-2026-82410

Pomerium is an identity and context-aware access proxy. Prior to 0.32.8, decodeQueryStringV2 in pkg/hpke/url.go performs zstd decompression of attacker-controlled data without an output-memory limit when DecryptURLValues processes HPKE V2 values for Stateless.Callback in...

CVE-2026-50285 Pomerium: Pre-Auth Memory Exhaustion via Unbounded zstd Decompression in HPKE Callback

Pomerium is an identity and context-aware access proxy. Prior to 0.32.8, decodeQueryStringV2 in pkg/hpke/url.go performs zstd decompression of attacker-controlled data without an output-memory limit when DecryptURLValues processes HPKE V2 values for Stateless.Callback in...

EUVD-2026-82322

mport is the MidnightBSD Package Manager. Prior to 2.7.8, libmport/util.c did not make every truncated, corrupt, or failed zstd stream fatal in mportdecompresszstd, and libmport/fetch.c did not consistently propagate those failures to index-fetch callers. A malicious or faulty mirror could supply...

CVE-2026-54580 mport index decompression can leave partial or corrupt index data after zstd failures

mport is the MidnightBSD Package Manager. Prior to 2.7.8, libmport/util.c did not make every truncated, corrupt, or failed zstd stream fatal in mportdecompresszstd, and libmport/fetch.c did not consistently propagate those failures to index-fetch callers. A malicious or faulty mirror could supply...

CVE-2026-54580 mport index decompression can leave partial or corrupt index data after zstd failures

mport is the MidnightBSD Package Manager. Prior to 2.7.8, libmport/util.c did not make every truncated, corrupt, or failed zstd stream fatal in mportdecompresszstd, and libmport/fetch.c did not consistently propagate those failures to index-fetch callers. A malicious or faulty mirror could supply...

CVE-2026-50285: Improper Validation of Specified Quantity in Input

Pomerium is an identity and context-aware access proxy. Prior to 0.32.8, decodeQueryStringV2 in pkg/hpke/url.go performs zstd decompression of attacker-controlled data without an output-memory limit when DecryptURLValues processes HPKE V2 values for Stateless.Callback in...

Pomerium Pre-Auth Memory Exhaustion via Unbounded zstd Decompression in HPKE Callback

Summary The HPKE V2 URL decode path in pkg/hpke/url.go decompresses attacker-controlled zstd data without any size limit. On Pomerium deployments using the stateless authentication flow Pomerium Zero / hosted authenticate, the proxy's /.pomerium/callback endpoint is reachable without credentials...

GHSA-GGW3-5987-RX77 Pomerium Pre-Auth Memory Exhaustion via Unbounded zstd Decompression in HPKE Callback

Summary The HPKE V2 URL decode path in pkg/hpke/url.go decompresses attacker-controlled zstd data without any size limit. On Pomerium deployments using the stateless authentication flow Pomerium Zero / hosted authenticate, the proxy's /.pomerium/callback endpoint is reachable without credentials...

CVE-2026-48044

Summary: CVE-2026-48044 affects Envoy’s zstd decompressor (ZstdDecompressorImpl). From 1.23.0 through 1.35.11, 1.36.7, 1.37.3, and 1.38.1, specially crafted, highly compressed zstd payloads can trigger massive memory allocation when decompression is enabled, potentially causing memory exhaustion ...

EUVD-2026-39820

Envoy is an open source edge and service proxy designed for cloud-native applications. From 1.23.0 until 1.35.11, 1.36.7, 1.37.3, and 1.38.1, a vulnerability has been identified in Envoy's zstd decompressor implementation ZstdDecompressorImpl. When zstd decompression is enabled, processing a...

USN-7927-3 python-urllib3 regression

USN-7927-1 fixed vulnerabilities in urllib3. The update for CVE-2025-66471 introduced a regression in urllib3 when decompressing zstd data. This update fixes the problem. We apologize for the inconvenience. Original advisory details: Illia Volochii discovered that urllib3 did not limit the steps ...

USN-7927-3: urllib3 regression

USN-7927-1 fixed vulnerabilities in urllib3. The update for CVE-2025-66471 introduced a regression in urllib3 when decompressing zstd data. This update fixes the problem. We apologize for the inconvenience. Original advisory details: Illia Volochii discovered that urllib3 did not limit the steps ...

USN-7927-2 python-urllib3 regression

USN-7927-1 fixed vulnerabilities in urllib3. The update for CVE-2025-66471 introduced a regression in the zstd decompression component inside urllib3. This update fixes the problem. We apologize for the inconvenience. Original advisory details: Illia Volochii discovered that urllib3 did not limit...

UBUNTU-CVE-2025-68210

In the Linux kernel, the following vulnerability has been resolved: erofs: avoid infinite loop due to incomplete zstd-compressed data Currently, the decompression logic incorrectly spins if compressed data is truncated in crafted deliberately corrupted images...

Linux Distros Unpatched Vulnerability : CVE-2025-68210

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - erofs: avoid infinite loop due to incomplete zstd-compressed data Currently, the decompression logic incorrectly spins if compressed data is truncated in crafte...

OSV-2025-312 Heap-buffer-overflow in ZSTD_decompressMultiFrame

OSS-Fuzz report: https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=414856644 Crash type: Heap-buffer-overflow READ 1 Crash state: ZSTDdecompressMultiFrame ZSTDdecompressDCtx zstdwrapdecompress...