CVE-2026-47746

CVE-2026-47746 affects Misskey (open source federated social platform). Affected versions are 12.37.0 and later, up to but not including 2026.5.4. The issue is a TOCTOU vulnerability in timing attacks during JSON-LD signature validation and the JSON-LD compaction process, caused by a non-shared p...

CVE-2026-47746 Misskey: JSON-LD signature validation + compaction is vulnerable to timing attacks

Misskey is an open source, federated social media platform. Versions 12.37.0 and later, but prior to 2026.5.4, are vulnerable to timing attacks during JSON-LD signature validation and the compaction process. Because the JSON-LD parsing context is not shared between signature verification and...

CVE-2026-46713 Misskey: JSON-LD signature validation + compaction may lead to improper activity handling

Misskey is an open source, federated social media platform. Versions 12.37.0 and later, but prior to 2026.5.4, contain a vulnerability in the JSON-LD signature validation and compaction process that allows spoofed activities to be accepted as valid. This issue has been fixed in version 2026.5.4...

CVE-2026-46712

Misskey (versions 2025.3.2 and later, prior to 2026.5.4) contains a permission-check vulnerability in the Direct Messages feature that lets access certain data points regardless of account permissions, even when federation is disabled. Notes with the new TODO visibility (formerly direct) are unaf...

EUVD-2026-52451

Misskey is an open source, federated social media platform. Versions 2025.3.2 and later, but prior to 2026.5.4, contain a vulnerability where a lack of proper permission checks allows access to certain data points from the Direct Messages formerly Chat feature, regardless of account permissions...

CVE-2026-46712 Misskey: Lack of proper permission checks in Direct Messaging feature

Misskey is an open source, federated social media platform. Versions 2025.3.2 and later, but prior to 2026.5.4, contain a vulnerability where a lack of proper permission checks allows access to certain data points from the Direct Messages formerly Chat feature, regardless of account permissions...

CVE-2026-69249

CVE-2026-69249 affects python-cryptography prior to 49.0.0, where resolving invalid certificate chains with duplicate self-signed intermediates can explode in recursion, causing resource exhaustion DoS. The core issue is in the recursive build_chain_inner not de-duplicating previously analyzed ca...

EUVD-2026-52449

Misskey is an open source, federated social media platform. All Misskey servers running versions 2024.5.0 and later, but prior to 2026.5.4, contain a vulnerability in the Server Announcements API where insufficient permission checks allow attackers to access limited portions of data that they...

CVE-2026-48115 Misskey: Improper Authorization in the Announcements API

Misskey is an open source, federated social media platform. All Misskey servers running versions 2024.5.0 and later, but prior to 2026.5.4, contain a vulnerability in the Server Announcements API where insufficient permission checks allow attackers to access limited portions of data that they...

CVE-2026-48115

CVE-2026-48115 affects Misskey servers running versions 2024.5.0 and later, up to but not including 2026.5.4, where the Server Announcements API lacks sufficient permission checks, allowing attackers to access data they normally shouldn’t view. The issue exists regardless of federation being enab...

CVE-2026-48115 Misskey: Improper Authorization in the Announcements API

Misskey is an open source, federated social media platform. All Misskey servers running versions 2024.5.0 and later, but prior to 2026.5.4, contain a vulnerability in the Server Announcements API where insufficient permission checks allow attackers to access limited portions of data that they...

CVE-2026-69248

cryptography is a package designed to expose cryptographic primitives and recipes to Python developers. Prior to 49.0.0, if an intermediate constrained CA permits the DNS name foo.example.com, and the leaf certificate has a wildcard in its DNS SAN of .example.com, python-cryptography's verifier...

DEBIAN-CVE-2026-69246

Guzzle is an extensible PHP HTTP client. Prior to 7.15.2 and 8.0.1, Guzzle gives a transport the request URI as text and supplies the Host header separately. The cURL handlers set CURLOPTURL to the URI exactly as written and push that Host into CURLOPTHTTPHEADER; StreamHandler does the same throu...

CVE-2026-69247 cryptography: PKCS#7 EnvelopedData decryption exposes a Bleichenbacher oracle through distinguishable errors and timing

cryptography is a package designed to expose cryptographic primitives and recipes to Python developers. From 44.0.0 until 50.0.0, pkcs7decryptder, pkcs7decryptpem, and pkcs7decryptsmime reported the outcome of decrypting a RecipientInfo's encryptedKey in several distinguishable ways, one of which...

CVE-2026-69245

Guzzle is an extensible PHP HTTP client. Prior to 7.15.2 and 8.0.1, SetCookie::matchesDomain gives every subdomain of a cookie Domain that cookie unless SetCookie::matchesDomain recognizes the Domain as an IP literal or a numeric host, and the decision comes from the domain's own text, so two...

CVE-2026-69246 Guzzle: Noncanonical host can bypass host-based checks

Guzzle is an extensible PHP HTTP client. Prior to 7.15.2 and 8.0.1, Guzzle gives a transport the request URI as text and supplies the Host header separately. The cURL handlers set CURLOPTURL to the URI exactly as written and push that Host into CURLOPTHTTPHEADER; StreamHandler does the same throu...

CVE-2026-69245 Guzzle: Noncanonical cookie domain keeps subdomain scope

Guzzle is an extensible PHP HTTP client. Prior to 7.15.2 and 8.0.1, SetCookie::matchesDomain gives every subdomain of a cookie Domain that cookie unless SetCookie::matchesDomain recognizes the Domain as an IP literal or a numeric host, and the decision comes from the domain's own text, so two...

CVE-2026-69245 Guzzle: Noncanonical cookie domain keeps subdomain scope

Guzzle is an extensible PHP HTTP client. Prior to 7.15.2 and 8.0.1, SetCookie::matchesDomain gives every subdomain of a cookie Domain that cookie unless SetCookie::matchesDomain recognizes the Domain as an IP literal or a numeric host, and the decision comes from the domain's own text, so two...

CVE-2026-69245

Guzzle is an extensible PHP HTTP client. Prior to 7.15.2 and 8.0.1, SetCookie::matchesDomain gives every subdomain of a cookie Domain that cookie unless SetCookie::matchesDomain recognizes the Domain as an IP literal or a numeric host, and the decision comes from the domain's own text, so two...

CVE-2026-66065

Ouroboros is a local-first runtime for AI coding agents that records their actions and applies user-defined policies to constrain behavior. Versions prior to 0.42.1 have an incomplete denylist. Several execution-routing keys of the same RCE class were omitted, so a malicious cloned repo can still...