CVE-2026-55548
Yamcs: Insecure Direct Object Reference (IDOR) in PacketsApi allows unprivileged users to dump all telemetry packets
Description
Yamcs is a mission control framework. Prior to 5.12.8 and 5.13.2, the PacketsApi.exportPackets endpoint in yamcs-core/src/main/java/org/yamcs/http/api/PacketsApi.java failed to enforce object-level ReadPacket privileges when a request omitted specific packet names: with an empty name list the ctx.checkObjectPrivileges(ObjectPrivilegeType.ReadPacket, nameSet) call passed over an empty set, no WHERE pname IN filter was applied to the resulting SELECT * FROM tm query, and the onTuple handler streamed every retrieved packet without any per-row authorization check, so a low-privileged or zero-privilege authenticated user could dump the entire raw telemetry packet archive and bypass the role-based access control model. This issue is fixed in versions 5.12.8 and 5.13.2, which enforce per-packet ReadPacket checks in exportPackets.
INFO
Published Date :
July 16, 2026, 5:16 p.m.
Last Modified :
July 20, 2026, 1:29 a.m.
Remotely Exploit :
Yes !
Source :
[email protected]
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS | 134c704f-9b21-4f2e-91b3-4a467353bcc0 | |||||
| CVSS 3.1 | MEDIUM | [email protected] |
Solution
- Update Yamcs to version 5.12.8 or later.
- Verify that authorization checks are properly enforced.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-55548.
| URL | Resource |
|---|---|
| https://github.com/yamcs/yamcs/commit/b566beceba98cc35514b0e1519be126b8c5a0438 | Patch |
| https://github.com/yamcs/yamcs/commit/c743cc3acf5b5c53ff5181b94eacc21340f70dd9 | Patch |
| https://github.com/yamcs/yamcs/releases/tag/yamcs-5.12.8 | Release Notes |
| https://github.com/yamcs/yamcs/releases/tag/yamcs-5.13.2 | Release Notes |
| https://github.com/yamcs/yamcs/security/advisories/GHSA-8xjq-pr36-ccgf | Exploit Mitigation Vendor Advisory |
| https://github.com/yamcs/yamcs/security/advisories/GHSA-8xjq-pr36-ccgf | Exploit Mitigation Vendor Advisory |
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-55548 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-55548
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-55548 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-55548 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
Initial Analysis by [email protected]
Jul. 20, 2026
Action Type Old Value New Value Added CPE Configuration OR *cpe:2.3:a:spaceapplications:yamcs:*:*:*:*:*:*:*:* versions up to (excluding) 5.12.8 *cpe:2.3:a:spaceapplications:yamcs:*:*:*:*:*:*:*:* versions from (including) 5.13.0 up to (excluding) 5.13.2 Added Reference Type GitHub, Inc.: https://github.com/yamcs/yamcs/commit/b566beceba98cc35514b0e1519be126b8c5a0438 Types: Patch Added Reference Type GitHub, Inc.: https://github.com/yamcs/yamcs/commit/c743cc3acf5b5c53ff5181b94eacc21340f70dd9 Types: Patch Added Reference Type GitHub, Inc.: https://github.com/yamcs/yamcs/releases/tag/yamcs-5.12.8 Types: Release Notes Added Reference Type GitHub, Inc.: https://github.com/yamcs/yamcs/releases/tag/yamcs-5.13.2 Types: Release Notes Added Reference Type GitHub, Inc.: https://github.com/yamcs/yamcs/security/advisories/GHSA-8xjq-pr36-ccgf Types: Exploit, Mitigation, Vendor Advisory Added Reference Type CISA-ADP: https://github.com/yamcs/yamcs/security/advisories/GHSA-8xjq-pr36-ccgf Types: Exploit, Mitigation, Vendor Advisory -
CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0
Jul. 16, 2026
Action Type Old Value New Value Added Reference https://github.com/yamcs/yamcs/security/advisories/GHSA-8xjq-pr36-ccgf Added SSVC {'id': 'CVE-2026-55548', 'role': 'CISA Coordinator', 'options': [{'exploitation': 'poc'}, {'automatable': 'no'}, {'technicalImpact': 'partial'}], 'version': '2.0.3', 'timestamp': '2026-07-16T18:13:25.756720Z'} -
New CVE Received by [email protected]
Jul. 16, 2026
Action Type Old Value New Value Added Affected [{'vendor': 'yamcs', 'product': 'yamcs', 'versions': [{'status': 'affected', 'version': '< 5.12.8'}, {'status': 'affected', 'version': '>= 5.13.0, < 5.13.2'}]}] Added Description Yamcs is a mission control framework. Prior to 5.12.8 and 5.13.2, the PacketsApi.exportPackets endpoint in yamcs-core/src/main/java/org/yamcs/http/api/PacketsApi.java failed to enforce object-level ReadPacket privileges when a request omitted specific packet names: with an empty name list the ctx.checkObjectPrivileges(ObjectPrivilegeType.ReadPacket, nameSet) call passed over an empty set, no WHERE pname IN filter was applied to the resulting SELECT * FROM tm query, and the onTuple handler streamed every retrieved packet without any per-row authorization check, so a low-privileged or zero-privilege authenticated user could dump the entire raw telemetry packet archive and bypass the role-based access control model. This issue is fixed in versions 5.12.8 and 5.13.2, which enforce per-packet ReadPacket checks in exportPackets. Added CVSS V3.1 AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N Added CWE CWE-284 Added CWE CWE-862 Added Reference https://github.com/yamcs/yamcs/commit/b566beceba98cc35514b0e1519be126b8c5a0438 Added Reference https://github.com/yamcs/yamcs/commit/c743cc3acf5b5c53ff5181b94eacc21340f70dd9 Added Reference https://github.com/yamcs/yamcs/releases/tag/yamcs-5.12.8 Added Reference https://github.com/yamcs/yamcs/releases/tag/yamcs-5.13.2 Added Reference https://github.com/yamcs/yamcs/security/advisories/GHSA-8xjq-pr36-ccgf