spin is no longer actively maintained

The author of the spin crate does not have time or interest to maintain it. Consider the following alternatives all of which support nostd: - conquer-once - lockapi a subproject of parkinglot - spinningtop spinlock crate built on lockapi - spinning...

`boxfnonce` obsolete with release of Rust 1.35.0

This commit marks the boxfnonce crate as obsolete and the GitHub repo has since been archived. The functionality of boxfnonce has been added to Rust since 1.35.0. Use Box...

MsQueue and SegQueue suffer from double-free

Even if an element is popped from a queue, crossbeam would run its destructor inside the epoch-based garbage collector. This is a source of double frees. The flaw was corrected by wrapping elements inside queues in a ManuallyDrop. Thanks to @c0gent for reporting the issue...

smallvec creates uninitialized value of any type

Affected versions of this crate called mem::uninitialized to create values of a user-supplied type T. This is unsound e.g. if T is a reference type which must be non-null and thus may not remain uninitialized. The flaw was corrected by avoiding the use of mem::uninitialized, using MaybeUninit...

Low-level GCM ignores the operation nonce

In all published versions of dcrypt-algorithms before 2.0.0, the low-level Gcm builder required an operation nonce but derived J0 from the nonce captured by the original Gcm constructor. Multiple operations could therefore silently reuse a nonce even when callers supplied distinct values,...

NIP-98 authorization parsing permits resource exhaustion

The NIP-98 HTTP authorization parser Base64-decoded the complete authorization value and parsed the resulting JSON event without applying an application-level size limit. Both operations occurred before the event's signature and authorization fields could be validated. An unauthenticated remote...

AES-GCM did not enforce limits on AAD length

NIST Special Publication 800-38D specifies that the bit length of the AAD shall not exceed 2^64 - 1 bits. The implementation of AES-GCM in libcrux-aesgcm neither enforced this limit for encryption nor for decryption. Impact Use of AES-GCM with AAD of length exceeding the prescribed maximum length...

Potentially Incorrect Output of Constant-Time Swap/Select on Aarch64

The implementation of constant-time swap and select on aarch64 platforms used a cmp instruction in inline assembly to check whether an 8-bit wide selector was 0. The cmp instruction works on 32-bit registers, which included the unspecified high 24 bits of the cmp operand. Depending on the executi...

smartstring is unmaintained

The smartstring crate is unmaintained; all versions are affected. The GitHub repository was archived by the owner on 2026-05-03. Recommended alternatives: compactstr smolstr...

Double-free in `Chomp::inner()`

Chomp::inner uses std::ptr::readunaligned to move out the value from a raw pointer. If the original value is an owned type e.g. Box, calling inner moves out the ownership, but the original variable will still be dropped at the end of its scope. This causes the same heap memory to be freed twice,...

`logprinter` was removed from crates.io for malicious code

The crate downloaded code from an external HTTP endpoint and executed it within its trace fn...

`tokio-uds` is unmaintained

The tokio-uds crate is unmaintained. It was part of the Tokio 0.1 ecosystem and has been superseded by the main tokio crate...

`tokio-reactor` is unmaintained

The tokio-reactor crate is unmaintained. It was part of the Tokio 0.1 ecosystem and has been superseded by the main tokio crate...

Insufficient validation of PAX extensions during extraction

In versions 0.5.6 and earlier of astral-tokio-tar, malformed PAX extensions were silently skipped when parsing tar archives. This silent skipping rather than rejection of invalid PAX extensions could be used as a building block for a parser differential, for example by silently skipping a malform...

`rpc-check` was removed from crates.io for malicious code

It was attempting to steal credentials from the POLYMARKETPRIVATEKEY environment variable. The malicious crate had 3 versions published on 2026-02-15 and had been downloaded only 155 times. There were no crates depending on this crate on crates.io. Thanks to Sisong Li for finding and reporting th...

`polymarkets-client-sdk` was removed from crates.io for malicious code

It appeared to be typosquatting existing crate polymarket-client-sdk polymarkets vs polymarket and attempting to steal credentials from local files. The malicious crate had 1 version published on 2026-02-19 an hour before removal and hadn't been downloaded. There were no crates depending on this...

Type confusion when accessing data from sublasses of subclasses of native types with `abi3` feature targeting Python 3.12 and up

PyO3 0.28.1 added support for pyclassextends=PyList struct NativeSub and other native types when targeting Python 3.12 and up with the abi3 feature. It was discovered that subclasses of such classes would use the type of the subclass when attempting to access to data of NativeSub contained within...

Potential undefined behavior when dereferencing Buf struct

if we dereference the Buf struct right after calling new or default on Buf struct, it passes Null Pointer to the unsafe function slice::fromrawparts. Based on the safety section documentation of function, data must be non-null and aligned even for zero-length slices or slices of ZSTs. Thus, passi...

number_prefix crate is unmaintained

The numberprefix crate is no longer actively maintained. If you rely on this crate, consider switching to a recommended alternative. Recommended alternatives - unit-prefix...

`unic-char-range` is unmaintained

All Unicode crates that are part of https://github.com/open-i18n/rust-unic are unmaintained. Recommended alternatives - Since version 1.45.0 Rust supports using char with ops::Range, RangeFrom, RangeFull, RangeInclusive, RangeTo to iterate over a range of codepoints...

`unic-cli` is unmaintained

All Unicode crates that are part of https://github.com/open-i18n/rust-unic are unmaintained...

`unic-ucd-case` is unmaintained

All Unicode crates that are part of https://github.com/open-i18n/rust-unic are unmaintained. Recommended alternatives - icuproperties...

`unic-ucd-bidi` is unmaintained

All Unicode crates that are part of https://github.com/open-i18n/rust-unic are unmaintained. Recommended alternatives - icuproperties...

Heap-buffer-overflow in nftnl::Batch::with_page_size (nftnl-rs)

A heap-buffer-overflow vulnerability exists in the Rust wrapper for libnftnl, triggered via the nftnl::Batch::withpagesize constructor. When a small or malformed page size is provided, the underlying C code allocates an insufficient buffer, leading to out-of-bounds writes during batch...

`unic-ucd-hangul` is unmaintained

All Unicode crates that are part of https://github.com/open-i18n/rust-unic are unmaintained. Recommended alternatives - icunormalizer - unicode-normalization...

Pingora MadeYouReset HTTP/2 vulnerability

Pingora deployments using versions prior to 0.6.0 that include HTTP/2 server support may be affected by the vulnerability described in CVE-2025-8671. Under certain conditions, Pingora applications may allocate buffers before the HTTP/2 reset and resulting stream cancellation is processed by the...

`libyml::string::yaml_string_extend` is unsound and unmaintained

In version 0.0.4, libyml::string::yamlstringextend was revised resulting in undefined behaviour, which is unsound. The GitHub project for libyml was archived after unsoundness issues were raised. If you rely on this crate, it is highly recommended switching to a maintained alternative. Recommende...

servo-fontconfig crate is unmaintained

The servo-fontconfig crate is no longer actively maintained. If you rely on this crate, consider switching to a maintained alternative. Recommended alternatives - fontconfig-rs...

Heap Buffer Overflow in the DrainCol Destructor

An off-by-one error in the DrainCol::drop destructor could cause an unsafe memory copy operation to exceed the bounds of the associated vector. The error was related to the size of the data being copied in one of the ptr::copy invocations inside the destructor. When removing the first column from...

Unsound issue in Trailer

Our static analyzer find a potential unsound issue in the construction of Trailer, where it doesn't provide enough check to ensure the soundness. trailer/src/lib.rs, Lines 18 to 25 in d474984: pub fn newcapacity: usize - Trailer unsafe let trailer = Trailer::allocatecapacity; let ptr = trailer.pt...

Panic in mp3-metadata due to the lack of bounds checking

The getid3 methods used by mp3metadata::readfromslice does not perform adequate bounds checking when recreating the tag due to the use of desynchronization. Fixed in Fix index error, released as part of 0.4.0...

`VMABuffer::set_data` may allow out-of-bounds writes from safe code

VMABuffer::setdata was a publicly accessible safe function. It accepted an arbitrary offset and a data slice, then used the offset in unsafe pointer arithmetic before copying the slice into a mapped allocation. Affected versions did not check that the requested write range fit within the allocati...

Versions of *ring* prior to 0.17 are unmaintained.

ring 0.16.20 was released over 4 years ago and isn't maintained, tested, etc. Additionally, the project's general policy is to only patch the latest release, which is 0.17.12 now. It will be difficult for anybody to backport future fixes to versions earlier than 0.17.10 due to license changes...

libwebp: OOB write in BuildHuffmanTable

Google and Mozilla have released security advisories for RCE due to heap overflow in libwebp. Google warns the vulnerability has been exploited in the wild. libwebp needs to be updated to 1.3.2 to include a patch for "OOB write in BuildHuffmanTable"...

Ascii allows out-of-bounds array indexing in safe code

Affected version of this crate had implementation of From for &mut u8 and &mut str. This can result in out-of-bounds array indexing in safe code. The flaw was corrected in commit 8a6c779 by removing those impls...

`os_socketaddr` invalidly assumes the memory layout of std::net::SocketAddr

The ossocketaddr crate has assumed std::net::SocketAddrV4 and std::net::SocketAddrV6 have the same memory layout as the system C representation sockaddr. It has simply casted the pointers to convert the socket addresses to the system representation. These layout were changed into idiomatic rust...

libp2p Lack of resource management DoS

libp2p allows a potential attacker to cause victim p2p node to run out of memory The out of memory failure can cause crashes where libp2p is intended to be used within large scale networks leading to potential Denial of Service DoS vector Users should upgrade or reference the DoS mitigation...

`array!` macro is unsound when its length is impure constant

Affected versions of this crate did substitute the array length provided by an user at compile-time multiple times. When an impure constant expression is passed as an array length such as a result of an impure procedural macro, this can result in the initialization of an array with uninitialized...

Arrow2 allows double free in `safe` code

The struct FfiArrowArray implements deriveClone that is inconsistent with its custom implementation of Drop, resulting in a double free when cloned. Cloning this struct in safe results in a segmentation fault, which is unsound. This derive was removed from this struct. All users are advised to...

Post-Quantum Signature scheme Rainbow level I parametersets broken

Ward Beullens found a practical key-recovery attack against Rainbow. The level I parametersets are removed from liboqs starting from version 0.7.2. Find the scientific details in Breaking Rainbow Takes a Weekend on a Laptop. This means all the oqs::sig::Algorithm::RainbowI variants are insecure...

xml-rs is Unmaintained

xml-rs is a XML parser has open issues around parsing including integer overflows / panics that may or may not be an issue with untrusted data. Together with these open issues with Unmaintained status xml-rs may or may not be suited to parse untrusted data. Alternatives - quick-xml...

Improper validation of Windows paths could lead to directory traversal attack

towerhttp::services::fs::ServeDir didn't correctly validate Windows paths meaning paths like /foo/bar/c:/windows/web/screen/img101.png would be allowed and respond with the contents of c:/windows/web/screen/img101.png. Thus users could potentially read files anywhere on the filesystem. This only...

Incorrect use of `set_len` allows for un-initialized memory

Affected versions of this crate passes an uninitialized buffer to a user-provided Read implementation. Arbitrary Read implementations can read from the uninitialized buffer memory exposure and also can return incorrect number of bytes written to the buffer. Reading from uninitialized memory...

Non-aligned u32 read in Chacha20 encryption and decryption

The implementation does not enforce alignment requirements on input slices while incorrectly assuming 4-byte alignment through an unsafe call to std::slice::fromrawpartsmut, which breaks the contract and introduces undefined behavior. This affects Chacha20 encryption and decryption in crypto2...

traitobject is Unmaintained

Crate traitobject has not had a release for over five years. In addition there is an existing security advisory that has not been addressed: - RUSTSEC-2020-0027 Possible Alternatives The below list has not been vetted in any way and may or may not contain alternatives; - destructuretraitobject...

ansi_term is Unmaintained

The maintainer has advised that this crate is deprecated and will not receive any maintenance. The crate does not seem to have much dependencies and may or may not be ok to use as-is. Last release seems to have been three years ago. Possible Alternatives The below list has not been vetted in any...

Relative Path Traversal in git-delta

git-delta before 0.8.3 on Windows resolves an executable's pathname as a relative path from the current directory...

Crate `twoway` deprecated by the author

The commit e99b3c7 releasing version 0.2.2 explicitly deprecates twoway in favour of memchr crate...

XSS in `comrak`

comrak operates by default in a "safe" mode of operation where unsafe content, such as arbitrary raw HTML or URLs with non-standard schemes, are not permitted in the output. This is per the reference GFM implementation, cmark-gfm. Ampersands were not being correctly escaped in link targets, makin...

push_cloned can drop uninitialized memory or double free on panic

Affected versions of stackdst used a pushinner function that increased the internal length of the array and then called val.clone. If the val.clone call panics, the stack could drop an already dropped element or drop uninitialized memory. This issue was fixed in 2a4d538 by increasing the length o...