Open5GS 2.8.0 S6a Authentication-Information-Request src/hss/hss-s6a-path.c hss_ogs_diam_s6a_air_cb Visited-PLMN-Id heap-based overflow

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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6.7$0-$5k0.87+

Summaryinfo

A vulnerability was found in Open5GS 2.8.0. It has been classified as critical. This affects the function hss_ogs_diam_s6a_air_cb of the file src/hss/hss-s6a-path.c of the component S6a Authentication-Information-Request Handler. Performing a manipulation of the argument Visited-PLMN-Id results in heap-based overflow. This vulnerability is cataloged as CVE-2026-78156. It is possible to initiate the attack remotely. Furthermore, there is an exploit available. To fix this issue, it is recommended to deploy a patch.

Detailsinfo

A vulnerability was found in Open5GS 2.8.0. It has been classified as critical. This affects the function hss_ogs_diam_s6a_air_cb of the file src/hss/hss-s6a-path.c of the component S6a Authentication-Information-Request Handler. The manipulation of the argument Visited-PLMN-Id with an unknown input leads to a heap-based overflow vulnerability. CWE is classifying the issue as CWE-122. A heap overflow condition is a buffer overflow, where the buffer that can be overwritten is allocated in the heap portion of memory, generally meaning that the buffer was allocated using a routine such as malloc(). This is going to have an impact on confidentiality, integrity, and availability.

It is possible to read the advisory at github.com. This vulnerability is uniquely identified as CVE-2026-78156. The exploitability is told to be easy. It is possible to initiate the attack remotely. Technical details and a exploit are known.

It is declared as proof-of-concept.

Applying the patch a9c82ee0b590d76a581b0580cb46b598984e2392 is able to eliminate this problem. The bugfix is ready for download at github.com.

Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

Name

Version

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 7.4
VulDB Meta Temp Score: 6.7

VulDB Base Score: 7.4
VulDB Temp Score: 6.7
VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Heap-based overflow
CWE: CWE-122 / CWE-119
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Status: Proof-of-Concept
Price Prediction: 🔍
Current Price Estimation: 🔒

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Patch
Status: 🔍

0-Day Time: 🔒

Patch: a9c82ee0b590d76a581b0580cb46b598984e2392

Timelineinfo

08/23/2026 Advisory disclosed
08/23/2026 +0 days VulDB entry created
08/23/2026 +0 days VulDB entry last update

Sourcesinfo

Product: github.com

Advisory: 4661
Status: Confirmed

CVE: CVE-2026-78156 (🔒)
GCVE (CVE): GCVE-0-2026-78156
GCVE (VulDB): GCVE-100-394539
scip Labs: https://www.scip.ch/en/?labs.20161013

Entryinfo

Created: 08/23/2026 13:39
Changes: 08/23/2026 13:39 (58)
Complete: 🔍
Submitter: WeiYi
Cache ID: 216::103

Submitinfo

Accepted

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