CVE-2026-104844 PostCSS: Quadratic complexity in flat selector parsing allows CPU exhaustion

PostCSS Selector Parser is a CSS selector parser that integrates with PostCSS but does not require it. Prior to 7.1.6, src/parser.js splitWord can receive a flat selector as one word token carrying many class or ID indexes because period and hash characters are not tokenizer word delimiters. The...

CVE-2026-104844

The PostCSS Selector Parser (prior to version 7.1.6 ) is vulnerable to a Denial of Service (DoS) attack due to quadratic complexity in flat selector parsing. The root cause lies in src/parser.js, where splitWord() accepts selectors with numerous class or ID indexes because period and hash charact...

CVE-2026-104844 PostCSS: Quadratic complexity in flat selector parsing allows CPU exhaustion

PostCSS Selector Parser is a CSS selector parser that integrates with PostCSS but does not require it. Prior to 7.1.6, src/parser.js splitWord can receive a flat selector as one word token carrying many class or ID indexes because period and hash characters are not tokenizer word delimiters. The...

CVE-2026-104424

Zebra before 6.1.0 contains an incorrect calculation vulnerability in its ZIP-317 block template selector that omits header and transaction-count size from the block budget. Attackers can place valid selectable transactions in a victim miner's mempool to shape templates into oversized blocks,...

PT-2026-104358

Name of the Vulnerable Software and Affected Versions PostCSS Selector Parser versions prior to 7.1.6 Description In the splitWord function within src/parser.js, the parser fails to treat period and hash characters as tokenizer word delimiters. This allows a flat selector to be processed as a...

CVE-2026-104424: Incorrect Calculation of Buffer Size

Zebra before 6.1.0 contains an incorrect calculation vulnerability in its ZIP-317 block template selector that omits header and transaction-count size from the block budget. Attackers can place valid selectable transactions in a victim miner's mempool to shape templates into oversized blocks,...

CVE-2026-104844: Uncontrolled Resource Consumption

PostCSS Selector Parser is a CSS selector parser that integrates with PostCSS but does not require it. Prior to 7.1.6, src/parser.js splitWord can receive a flat selector as one word token carrying many class or ID indexes because period and hash characters are not tokenizer word delimiters. The...

PT-2026-104235

Name of the Vulnerable Software and Affected Versions Zebra versions prior to 6.1.0 Description An incorrect calculation in the ZIP-317 block template selector fails to account for the header and transaction-count size within the block budget. This allows attackers to submit valid selectable...

GO-2026-6548 Dasel: Selector lexer panics on trailing whitespace in `parseCurRune` in github.com/tomwright/dasel

Dasel: Selector lexer panics on trailing whitespace in parseCurRune in github.com/tomwright/dasel...

Soup Sieve: Polynomial-time ReDoS (O(n²)) in the whitespace/comment trimming regex `RE_WS_END` (triggers on VALID selectors)

SummaryBefore tokenizing, selectoriter trims leading/trailing whitespace and comments by running two regexes over the whole raw selector with .search. The trailing one, REWSEND = re.compiler'WSC$', is anchored only at the end $, not the start. Because .search retries the pattern at every offset, ...

PYSEC-2026-4171 Soup Sieve: Polynomial-time ReDoS (O(n²)) in the whitespace/comment trimming regex `RE_WS_END` (triggers on VALID selectors)

Summary Before tokenizing, selectoriter trims leading/trailing whitespace and comments by running two regexes over the whole raw selector with .search. The trailing one, REWSEND = re.compiler'WSC$', is anchored only at the end $, not the start. Because .search retries the pattern at every offset,...

PYSEC-2026-4170 Soup Sieve: Polynomial-time ReDoS (O(n²)) in the `IDENTIFIER` / `VALUE` selector sub-patterns

Summary soupsieve compiles CSS selector strings with a set of hand-written regular expressions. The shared IDENTIFIER sub-pattern also embedded in VALUE, and therefore in attribute selectors places two adjacent quantified groups over overlapping character classes: ?:classA|ESC+?:classB|ESC, where...

Soup Sieve: Polynomial-time ReDoS (O(n²)) in the `IDENTIFIER` / `VALUE` selector sub-patterns

Summarysoupsieve compiles CSS selector strings with a set of hand-written regular expressions. The shared IDENTIFIER sub-pattern also embedded in VALUE, and therefore in attribute selectors places two adjacent quantified groups over overlapping character classes: ?:classA|ESC+?:classB|ESC, where...

PT-2026-105570

Dasel: Selector lexer panics on trailing whitespace in parseCurRune in github.com/tomwright/dasel...

PT-2026-105199

RabbitMQ is a messaging and streaming broker. From 4.0.0 until 4.0.23, 4.1.14, 4.2.9, and 4.3.3, the optional rabbitmq jms topic exchange plugin's x-jms-topic exchange accepted a client-controlled rjms erlang selector binding expression whose LIKE evaluator expanded percent and underscore wildcar...

PT-2026-105157

RabbitMQ is a messaging and streaming broker. Prior to versions 3.13.15, 4.0.20, 4.1.11, 4.2.6, and 4.3.1, get chunk selector/1 calls binary to atom on the raw client-supplied property from post-auth subscribe and resolve offset spec frames, with no whitelist and no existing guard. An authenticat...

PT-2026-105914

Summary soupsieve compiles CSS selector strings with a set of hand-written regular expressions. The shared IDENTIFIER sub-pattern also embedded in VALUE, and therefore in attribute selectors places two adjacent quantified groups over overlapping character classes: ?:classA|ESC+?:classB|ESC, where...

PT-2026-105915

Summary Before tokenizing, selector iter trims leading/trailing whitespace and comments by running two regexes over the whole raw selector with .search. The trailing one, RE WS END = re.compiler'WSC$', is anchored only at the end $, not the start. Because .search retries the pattern at every...

BIT-ARGO-WORKFLOWS-2026-93991 Argo Workflows 4.1.0 through 4.1.3 Cross-Namespace Disclosure via Negated Selector

Argo Workflows versions 4.1.0 through 4.1.3 contain an authorization bypass vulnerability in ListArchivedWorkflows that fails to apply cluster-scoped access review when the metadata.namespace field selector uses the NotEquals operator. Attackers with namespace-scoped list permissions can use a...

CLEANSTART-2026-IA02205 Soup Sieve is a CSS selector library designed to be used with Beautiful Soup 4

CVE-2026-85999 affects multiple packages. Soup Sieve is a CSS selector library designed to be used with Beautiful Soup 4. See references for individual vulnerability details...