CVE-2026-0719VulnerabilityPublished 9 Feb 2026Updated 8 Jun 2026

Red Hat Security Advisory: libsoup security update

Affects Red Hat libsoupSource GCVE Database

Mentioned vulnerabilities

CVE-2026-1761

Authoritative record:CVE-2026-0719· High 8.6

Not known to be exploited · CVSS 8.6 High.

Data as of 26 Oct 2026, 09:16 UTC

CVSS 3.1 base score

8.6High

How severe the flaw is on the 0–10 CVSS scale.

EPSS: 0.6% chance of exploitation in 30 days – higher than 48% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:H

Exploitation evidence

Disclosed: evidence found.
CVE published 8 Jan 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponised: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 26 Oct 2026.

Disclosed: The CVE record is public on cve.org. Its publication is t = 0.
Detectable: A public nuclei template can find exposed instances, for defenders and attackers alike.
Weaponised: Public exploit code exists in Metasploit or Exploit-DB, or CISA SSVC reports a public proof of concept.
Exploited in the wild: CISA KEV lists it, CISA SSVC rates exploitation active, or a source reports attacks.
Observed by OffSeq Mirage: OffSeq Mirage honeypot sensors recorded attack traffic for this CVE, or found exposed hosts without attack traffic.

Moments are spaced evenly, not to scale; a dashed line marks a gap of six months or more. Deltas count from t = 0. Sources that give only a date (CISA KEV, Exploit-DB, or a time of exactly 00:00Z) read “same day” rather than hours. Metasploit modules carry the flaw’s disclosure date, not their release date, and nuclei templates carry no date, so both appear above but not on the timeline.

What to do

Affected software

Product	Affected	Fixed in
Red Hatredhat/libsoup`pkg:rpm/redhat/libsoup`Other threats	Affected =2.72.0-12.el9_7.5	Fixed in–

Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.

AI-suggested

Red Hat has released updated libsoup packages for Red Hat Enterprise Linux 9 that address these vulnerabilities. Users should apply the security update as described in Red Hat advisory RHSA-2026:2216 and the related article https://access.redhat.com/articles/11258. No additional mitigation steps are indicated by the vendor. Patch status is confirmed as fixed in libsoup-2.72.0-12.el9_7.5 and related packages.

Description

Two security vulnerabilities have been identified in the libsoup HTTP client and server library for GNOME, used in Red Hat Enterprise Linux 9. These include a signed to unsigned conversion error causing a stack-based buffer overflow in NTLM authentication (CVE-2026-0719) and a stack-based buffer overflow in multipart HTTP response parsing (CVE-2026-1761). Red Hat has issued an important security advisory with updates to address these issues. The vulnerabilities are rated as having important security impact, and updated libsoup packages are available for Red Hat Enterprise Linux 9 across multiple architectures.

Impact

Successful exploitation of these vulnerabilities could lead to denial of service or arbitrary code execution due to stack-based buffer overflows in the libsoup library. This affects applications relying on libsoup for HTTP client or server functionality, including those using NTLM authentication or processing multipart HTTP responses. The advisory rates the security impact as Important (high severity). There are no known exploits in the wild at the time of this advisory.

Summary

The libsoup library used in Red Hat Enterprise Linux 9 contains two stack-based buffer overflow vulnerabilities. CVE-2026-0719 arises from a signed to unsigned conversion error in the NTLM authentication code path, potentially leading to memory corruption. CVE-2026-1761 involves a stack-based buffer overflow triggered by malformed multipart HTTP responses. These vulnerabilities could be exploited to cause crashes or potentially execute arbitrary code. Red Hat has released updated libsoup packages to fix these issues as detailed in advisory RHSA-2026:2216.

CWE-121Stack-based Buffer Overflow (opens in a new tab)
Variant weaknessLikelihood of exploit: HighCWE Top 25 (2025): #14
A stack-based buffer overflow condition is a condition where the buffer being overwritten is allocated on the stack (i.e., is a local variable or, rarely, a parameter to a function).
Operation · Build and Compilation · Environment Hardening
Use automatic buffer overflow detection mechanisms that are offered by certain compilers or compiler extensions. Examples include: the Microsoft Visual Studio /GS flag, Fedora/Red Hat FORTIFY_SOURCE GCC flag, StackGuard, and ProPolice, which provide various mechanisms including canary-based detection and range/index…
Architecture and Design
Use an abstraction library to abstract away risky APIs. Not a complete solution.
Implementation
Implement and perform bounds checking on input.
OWASP Cheat Sheets
XML Security (opens in a new tab)
Mass Assignment (opens in a new tab)
OWASP ASVS 4.0.3
V13.3.1 (opens in a new tab)
V5.1.4 (opens in a new tab)
V5.1.3 (opens in a new tab)
From MITRE CWE, MITRE CAPEC and OWASP (Top 10, OpenCRE).

References

Community reviews

Loading reviews…

Exploitation evidence

What to do

Affected software

Description

AI analysisMachine-generated, updated 9 Jun 2026, 10:46 UTC

WeaknessesCWE-121

Technical details

References

Community reviews

Related threats