Answer in brief
CVE-2026-45677 records a High severity (CVSS 8.7) vulnerability in Rocket.Chat: Lack of SAML Signature Check During Logout Could Lead To DoS. The current sources do not mark it as known exploited. The current feed maps RocketChat/Rocket.Chat (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
CVSS is 8.7. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps RocketChat/Rocket.Chat (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| RocketChat/Rocket.Chatgeneric | >= 8.5.0-rc.0, < 8.5.0 || >= 8.4.0-rc.0, < 8.4.1 || >= 8.3.0-rc.0, < 8.3.3 || >= 8.2.0-rc.0, < 8.2.3 || >= 8.1.0-rc.0, < 8.1.4 || >= 8.0.0-rc.0, < 8.0.5 || >= 7.11.0-rc.0, < 7.13.7 || < 7.10.11 | Not reported |
Published upstream
Jun 24, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Jun 25, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Jun 24, 2026
Rocket.Chat is an open-source, secure, fully customizable communications platform. Prior to 8.5.0, 8.4.1, 8.3.3, 8.2.3, 8.1.4, 8.0.5, 7.13.7, and 7.10.11, Rocket.Chat's SAML integration does not verify the signature on inbound LogoutRequest messages. An unauthenticated remote attacker who knows a target user's SAML NameID - which major identity providers (Okta, Google Workspace, Microsoft Entra ID, JumpCloud) expose as the user's email address - can craft a valid-looking unsigned LogoutRequest and submit it to the SP logout endpoint. The server processes it as legitimate, immediately destroying the victim's session. Because the attack requires no authentication and no interaction from the victim, it can be repeated in a loop against individual users or scripted across many accounts, effectively rendering the Rocket.Chat instance unusable for SAML-authenticated users. This vulnerability is fixed in 8.5.0, 8.4.1, 8.3.3, 8.2.3, 8.1.4, 8.0.5, 7.13.7, and 7.10.11.
Quoted source text, attributed separately from HOL analysis.
Answer in brief
CVE-2026-45677 records a High severity (CVSS 8.7) vulnerability in Rocket.Chat: Lack of SAML Signature Check During Logout Could Lead To DoS. The current sources do not mark it as known exploited. The current feed maps RocketChat/Rocket.Chat (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
CVSS is 8.7. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps RocketChat/Rocket.Chat (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| RocketChat/Rocket.Chatgeneric | >= 8.5.0-rc.0, < 8.5.0 || >= 8.4.0-rc.0, < 8.4.1 || >= 8.3.0-rc.0, < 8.3.3 || >= 8.2.0-rc.0, < 8.2.3 || >= 8.1.0-rc.0, < 8.1.4 || >= 8.0.0-rc.0, < 8.0.5 || >= 7.11.0-rc.0, < 7.13.7 || < 7.10.11 | Not reported |
Published upstream
Jun 24, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Jun 25, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Jun 24, 2026
Rocket.Chat is an open-source, secure, fully customizable communications platform. Prior to 8.5.0, 8.4.1, 8.3.3, 8.2.3, 8.1.4, 8.0.5, 7.13.7, and 7.10.11, Rocket.Chat's SAML integration does not verify the signature on inbound LogoutRequest messages. An unauthenticated remote attacker who knows a target user's SAML NameID - which major identity providers (Okta, Google Workspace, Microsoft Entra ID, JumpCloud) expose as the user's email address - can craft a valid-looking unsigned LogoutRequest and submit it to the SP logout endpoint. The server processes it as legitimate, immediately destroying the victim's session. Because the attack requires no authentication and no interaction from the victim, it can be repeated in a loop against individual users or scripted across many accounts, effectively rendering the Rocket.Chat instance unusable for SAML-authenticated users. This vulnerability is fixed in 8.5.0, 8.4.1, 8.3.3, 8.2.3, 8.1.4, 8.0.5, 7.13.7, and 7.10.11.
Quoted source text, attributed separately from HOL analysis.