PYSEC-2026-3897 PraisonAI MCP HTTP server has unauthenticated unbounded session accumulation (memory exhaustion; session TTL never enforced)

Summary The PraisonAI MCP HTTP-stream server creates a new in-memory session on every initialize request and never removes it. The cleanup routine that would expire sessions cleanupsessions is defined but never called anywhere in the codebase, and the configured session TTL is never enforced. The...

praisonaiagents: ast_grep_rewrite rewrites arbitrary files without the @require_approval gate enforced on every sibling mutation tool

Target: PraisonAI MervinPraison/PraisonAIAffected component: praisonaiagents/tools/astgreptool.py — astgreprewriteAffected versions: master at ce97667156a116c50b4a3d1aa21e09f048903fda; reproduced against the current praisonaiagents PyPI release praisonaiagents = 1.6.52. SummaryTools in...

PYSEC-2026-3901 praisonaiagents: ast_grep_rewrite rewrites arbitrary files without the @require_approval gate enforced on every sibling mutation tool

Target: PraisonAI MervinPraison/PraisonAI Affected component: praisonaiagents/tools/astgreptool.py — astgreprewrite Affected versions: master at ce97667156a116c50b4a3d1aa21e09f048903fda; reproduced against the current praisonaiagents PyPI release praisonaiagents --rewrite --lang --update-all line...

PYSEC-2026-3862 mcp-contextforge-gateway has RestrictedPython sandbox bypass via getattr builtin in python_sandbox_server

Commit: f855e54d5b7bc1c91b977574a03b91eff6b86bb6 Component: mcp-servers/python/pythonsandboxserver/src/pythonsandboxserver/serverfastmcp.py Vulnerability RestrictedPython's sandbox in ContextForge's pythonsandboxserver sub-project allows arbitrary Python execution via three compounding weaknesses...

PraisonAI workflow include bypasses tools.py autoload opt-in and executes included recipe code

SummaryPraisonAI's workflow include implementation implicitly imports and executes an included recipe's tools.py file even when the documented tools.py autoload opt-in is unset.This bypasses the hardening added for the prior automatic tools.py RCE advisory family. A workflow that includes an...

PraisonAI workflow include bypasses tools.py autoload opt-in and executes included recipe code

SummaryPraisonAI's workflow include implementation implicitly imports and executes an included recipe's tools.py file even when the documented tools.py autoload opt-in is unset.This bypasses the hardening added for the prior automatic tools.py RCE advisory family. A workflow that includes an...

PYSEC-2026-3903 PraisonAI workflow include bypasses tools.py autoload opt-in and executes included recipe code

Summary PraisonAI's workflow include implementation implicitly imports and executes an included recipe's tools.py file even when the documented tools.py autoload opt-in is unset. This bypasses the hardening added for the prior automatic tools.py RCE advisory family. A workflow that includes an...

PraisonAI has an origin validation bypass in MCP HTTP Stream transport that allows browser-mediated unauthenticated tool execution on local MCP server

SummaryPraisonAI's MCP HTTP Stream transport uses an unsafe prefix match when validating the Origin header. The default localhost allowlist includes origins such as http://localhost, and the validation accepts any origin that starts with an allowed value.As a result, an attacker-controlled origin...

mcp-contextforge-gateway has RestrictedPython sandbox bypass via getattr builtin in python_sandbox_server

Commit: f855e54d5b7bc1c91b977574a03b91eff6b86bb6Component: mcp-servers/python/pythonsandboxserver/src/pythonsandboxserver/serverfastmcp.py VulnerabilityRestrictedPython's sandbox in ContextForge's pythonsandboxserver sub-project allows arbitrary Python execution via three compounding weaknesses:1...

PYSEC-2026-3891 PraisonAI workflow include bypasses tools.py autoload opt-in and executes included recipe code

Summary PraisonAI's workflow include implementation implicitly imports and executes an included recipe's tools.py file even when the documented tools.py autoload opt-in is unset. This bypasses the hardening added for the prior automatic tools.py RCE advisory family. A workflow that includes an...

PYSEC-2026-3900 praisonaiagents has a `web_crawl` SSRF protection bypass via unchecked redirect targets

Summary praisonaiagents.tools.webcrawltools.webcrawl validates the initial URL and blocks direct loopback/private destinations by default, but the default httpx fallback still uses httpx.Clientfollowredirects=True and does not revalidate redirect targets. An attacker-controlled public URL can pas...

praisonaiagents has a `web_crawl` SSRF protection bypass via unchecked redirect targets

Summarypraisonaiagents.tools.webcrawltools.webcrawl validates the initial URL and blocks direct loopback/private destinations by default, but the default httpx fallback still uses httpx.Clientfollowredirects=True and does not revalidate redirect targets.An attacker-controlled public URL can pass...

PYSEC-2026-3822 django CMS: Plugin move endpoint allows cyclic reparenting (DoS)

Summary The moveplugin admin endpoint does not prevent a plugin from being reparented under itself or one of its own descendants. Doing so creates a cycle in the plugin tree, after which the recursive descendant/ancestor SQL queries loop without terminating, stalling the request worker. Details...

PYSEC-2026-3896 PraisonAI has an origin validation bypass in MCP HTTP Stream transport that allows browser-mediated unauthenticated tool execution on local MCP server

Summary PraisonAI's MCP HTTP Stream transport uses an unsafe prefix match when validating the Origin header. The default localhost allowlist includes origins such as http://localhost, and the validation accepts any origin that starts with an allowed value. As a result, an attacker-controlled orig...

django CMS: Clipboard copy IDOR discloses unauthorized plugin content

Summary The clipboard copy paths of the copyplugins admin endpoint validate only the target the user's own clipboard and skip source-side authorization. A staff user can copy plugins out of a placeholder they have no permission on into their clipboard, then read the secret content. Details In...

PYSEC-2026-3946 Xinference vulnerable to remote code execution via unsafe `eval()` in Llama3 tool-call parsing

Summary Xinference used Python's unsafe eval function when parsing Llama3 tool-call output generated by a large language model. Because the model output can be influenced by attacker-controlled prompts sent to the chat completion API, a remote attacker can craft prompts that cause the model to...

PYSEC-2026-3820 django CMS: Clipboard copy IDOR discloses unauthorized plugin content

Summary The clipboard copy paths of the copyplugins admin endpoint validate only the target the user's own clipboard and skip source-side authorization. A staff user can copy plugins out of a placeholder they have no permission on into their clipboard, then read the secret content. Details In...

asteval has a Sandbox Escape via BaseException Subclasses

SummaryAn attacker who can supply expressions to asteval.Interpreter.eval can raise SystemExit,KeyboardInterrupt, GeneratorExit, or BaseException from inside the sandbox. Theseexceptions are subclasses of BaseException but not Exception, so they bypass theexcept Exception: safety net in both run...

PYSEC-2026-3826 django CMS: Structure endpoint bypasses page-view permission

Summary The structure-board endpoint renderobjectstructure renders a page's plugin structure without verifying that the requesting user is allowed to view the page. The edit and preview endpoints enforce this via renderpage, but the structure endpoint does not, allowing a low-privileged staff use...

PYSEC-2026-3807 asteval has a Sandbox Escape via BaseException Subclasses

Summary An attacker who can supply expressions to asteval.Interpreter.eval can raise SystemExit, KeyboardInterrupt, GeneratorExit, or BaseException from inside the sandbox. These exceptions are subclasses of BaseException but not Exception, so they bypass the except Exception: safety net in both...