NVD / CVE Program· CNA hackerone

CVE-2026-58066: Rocket.Chat's SAML SSO before versions 8.7.0, 8.6.1, 8.5.2, 8.4.5, 8.3.7, 8.2.7, 8.1.7, 8.0.8, and 7.10.14 verified XML signatures but did…

CriticalCVSS 9.8 · v3.0—No exploit Fix available

Noroxi assessment

Priority: Monitor (action score 39/100)

The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
Probability of exploitation in the next 30 days: 0.38% (FIRST EPSS).
Anyone who can reach it over the internet can trigger it. No account or password is required. No user action is required. No special conditions are required; it is repeatable.
According to CISA the attack is automatable: targets can be found by mass scanning.
Fixed version: Rocket.Chat Rocket.Chat 7.10.14, 8.0.8, 8.1.7.

Low priority for now. Upgrade to Rocket.Chat Rocket.Chat 7.10.14, 8.0.8, 8.1.7 or later.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · FIRST EPSS

Rocket.Chat's SAML SSO before versions 8.7.0, 8.6.1, 8.5.2, 8.4.5, 8.3.7, 8.2.7, 8.1.7, 8.0.8, and 7.10.14 verified XML signatures but did not bind the validated signature to samlp:Response / saml:Assertion. An attacker could submit a wrapped document carrying forged identity attributes alongside any valid signature made by the trusted IdP certificate, and log in as an arbitrary user.

Published: Jul 30, 2026
Updated: Aug 25, 2026
EPSS: 0.3% · 32th percentile
CWE: CWE-287

Report tools

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Action score

Monitor

Low priority for now.

CVSS: 39 / 40 · 9.8 / 10
CISA KEV: 0 / 30 · Not listed
EPSS: 0 / 30 · 0.3%

CISA SSVC decision

Exploitation: none
Automatable: yes
Technical impact: total

Vulnrichment: CISA's decision-tree inputs.

CNA vs NVD score

NVD: —
CNA · hackerone: 9.8; NVD has not scored this yet; the score shown is the CNA’s.

The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.

Get told when this record changes

Not in KEV: no record of exploitation in the wild
No public exploit code on record
A fix has been released

If any of these changes, we'll tell you in the daily email digest.

Is your version affected? Check it

Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

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Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

Vendor	Product	CPE
rocket.chat	rocket.chat	cpe:2.3:a:rocket.chat:rocket.chat

Versions reported by the vendor

Affected version ranges reported by the assigning authority (hackerone). Independent of NVD's CPE analysis and usually ahead of it.

Rocket.Chat Rocket.Chat
- before 8.7.0affected · semver
- before 8.6.1affected · semver
- before 8.5.2affected · semver
- before 8.4.5affected · semver
- before 8.3.7affected · semver
- before 8.2.7affected · semver
- before 8.1.7affected · semver
- before 8.0.8affected · semver
- before 7.10.14affected · semver

Affected versions · NVD (8)

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

rocket.chat rocket.chatbefore 7.10.14
rocket.chat rocket.chat8.0.0 and later · before 8.0.8
rocket.chat rocket.chat8.1.0 and later · before 8.1.7
rocket.chat rocket.chat8.2.0 and later · before 8.2.7
rocket.chat rocket.chat8.3.0 and later · before 8.3.7
rocket.chat rocket.chat8.4.0 and later · before 8.4.5
rocket.chat rocket.chat8.5.0 and later · before 8.5.2
rocket.chat rocket.chat8.6.0 and later · before 8.6.1

Same product

rocket.chat: all records

Other highest-scoring records for the same primary product.

CVE-2021-22911A improper input sanitization vulnerability exists in Rocket.Chat server 3.11, 3.12 & 3.13 that could lead to unauthenticated NoSQL…
68This week
CVE-2022-44567A command injection vulnerability exists in Rocket.Chat-Desktop <3.8.14 that could allow an attacker to pass a malicious url of…
40Plan
CVE-2021-22910A sanitization vulnerability exists in Rocket.Chat server versions <3.13.2, <3.12.4, <3.11.4 that allowed queries to an endpoint which…
40Plan

Published before and after this one in the same product

← EarlierCVE-2026-48616Jun 17, 2026 · Rocket.Chat versions <8.5.1, 8.4.4, 8.3.6, 8.2.6, 8.1.6, 8.0.7, 7.13.9, 7.10.13 has an access control vulnerability in Livechat files.
37Monitor
← EarlierCVE-2026-48929Jun 17, 2026 · Rocket.Chat in versions <8.5.1, <8.4.4, <8.3.6, <8.2.6, <8.1.6, <8.0.7, <7.13.9, and <7.10.13 is vulnerable to unauthenticated file…
30Monitor
Later →CVE-2026-56845Aug 3, 2026 · An unauthenticated path traversal (LFI) vulnerability exists under /custom-sounds/ when CustomSounds storage is configured to FileSystem.
30Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / package	Fixed version	Source
Rocket.Chat Rocket.Chat	7.10.14	Vendor (CNA)
Rocket.Chat Rocket.Chat	8.0.8	Vendor (CNA)
Rocket.Chat Rocket.Chat	8.1.7	Vendor (CNA)
Rocket.Chat Rocket.Chat	8.2.7	Vendor (CNA)
Rocket.Chat Rocket.Chat	8.3.7	Vendor (CNA)
Rocket.Chat Rocket.Chat	8.4.5	Vendor (CNA)
Rocket.Chat Rocket.Chat	8.5.2	Vendor (CNA)
Rocket.Chat Rocket.Chat	8.6.1	Vendor (CNA)
Rocket.Chat Rocket.Chat	8.7.0	Vendor (CNA)

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

No dated events beyond publication.

EPSS, last 120 days

FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

RocketChat/Rocket.ChatPR 41233

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

jayden (0jayden)finder

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

CVE-2026-28514146 days apartRocket.Chat: Users can login with any password via the EE ddp-streamer-service
37Monitor
CVE-2026-30831146 days apartRocket.Chat: 2FA bypass and login of deactivated users via EE ddp-streamer
32Monitor
CVE-2026-4892943 days apartRocket.Chat in versions <8.5.1, <8.4.4, <8.3.6, <8.2.6, <8.1.6, <8.0.7, <7.13.9, and <7.10.13 is vulnerable to unauthenticated file…
30Monitor

Not on record for this CVE: public bounty program.

Technical details

Attack conditions

Anyone who can reach it over the internet can trigger it.
No account or password is required.
No user action is required.
No special conditions are required; it is repeatable.

If successful

Confidentiality: high · data can be read
Integrity: high · data or configuration can be modified
Availability: high · the service can be disrupted

Attack vector: Network
Attack complexity: Low
Privileges required: None
User interaction: None
Scope: Unchanged
Confidentiality impact: High
Integrity impact: High
Availability impact: High

Weakness class (CWE)

CWE-287 · Improper Authentication

CVSS vector

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

nvd-secondary

Root cause

Authentication is added route by route instead of being enforced in one place. When a route added later bypasses the shared middleware, the session check never runs for it.

The bug in code

The whole CWE-287 class

A representative example of this vulnerability class. Not the vendor's source code; it shows the faulty pattern and its fix.

Vulnerable

1app.use("/admin", requireSession, adminRouter);
2

3// Route added later skips the middleware
4app.post("/admin-api/config", updateConfig);

Fixed

1const admin = express.Router();
2admin.use(requireSession, requireRole("admin"));
3

4admin.post("/config", updateConfig);
5app.use("/admin", admin);

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

Attack patterns (CAPEC)

ATT&CK techniques

Change log (1)

Fix✗ → ✓Sep 28, 2026, 10:10 PM UTC

For records you follow, these changes also arrive as notifications. →

References

github.com/RocketChat/Rocket.Chat/pull/41233

Show all references (1 more)

hackerone.com/reports/3827674

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records