CVE-2026-1761Network attack vector

Code execution via multipart response length miscalculation

Published Feb 2, 2026 · Updated Feb 2, 2026

Stack-based buffer overflow in libsoup on affected Red Hat Enterprise Linux releases allows remote attackers to execute arbitrary code. soup_filter_input_stream_read_until() miscalculates the multipart delimiter length and copies more response data than the caller-provided stack buffer can hold. Exploitation requires an application to process a crafted multipart HTTP response from an untrusted server; the overflow causes memory corruption, application crashes, or arbitrary code execution without authentication or user interaction.

CVSS severity8.6
High
EPSS probability0.98%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Stack-based buffer overflow in libsoup on affected Red Hat Enterprise Linux releases allows remote attackers to execute arbitrary code. soup_filter_input_stream_read_until() miscalculates the multipart delimiter length and copies more response data than the caller-provided stack buffer can hold. Exploitation requires an application to process a crafted multipart HTTP response from an untrusted server; the overflow causes memory corruption, application crashes, or arbitrary code execution without authentication or user interaction.

The record

CVE
CVE-2026-1761
Published
Feb 2, 2026
Updated
Feb 2, 2026
Vendor
389 Directory Server
Product
Red Hat Enterprise Linux 10
Classifications
CWE-121, T1203
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Feb 2, 2026CVE publishedPublication date reported by the CVE source.
  2. Feb 2, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Affected versions are unavailable in this record. Check the vendor advisory for version and patch details.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

389 Directory Server · Red Hat Enterprise Linux 10Affected versions are unavailable in this record.
389 Directory Server · Red Hat Enterprise Linux 7Affected versions are unavailable in this record.
389 Directory Server · Red Hat Enterprise Linux 9Affected versions are unavailable in this record.
389 Directory Server · Red Hat Enterprise Linux 8Affected versions are unavailable in this record.

Published CVSS scores

8.6Red HatCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:L

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-121Stack-based Buffer Overflow
T1203Exploitation for Client Execution

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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