How severe is CVE-2026-49841?

CVE-2026-49841 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2026-49841 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (31st percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-49841?

CVE-2026-49841 affects Freeswitch. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-49841?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.

Does CVE-2026-49841 have an EU (EUVD) identifier?

Yes. CVE-2026-49841 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-35472.

When was CVE-2026-49841 published?

CVE-2026-49841 was published on 2026-06-09 and last updated on 2026-06-17.

CVE-2026-49841

CVE-2026-49841 is a critical-severity vulnerability in Freeswitch with a CVSS 3.x base score of 9.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-122.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
EPSS exploit prediction: 0% (31st percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-35472
Weakness: CWE-122
Affected product: Freeswitch
Published: 2026-06-09
Last modified: 2026-06-17

Description

FreeSWITCH is a Software Defined Telecom Stack enabling the digital transformation from proprietary telecom switches to a software implementation that runs on any commodity hardware. Prior to version 1.11.1, the mod_verto HTTP request handler allocates a fixed 2 MiB buffer for a POST application/x-www-form-urlencoded body but accepts Content-Length up to just under 10 MiB. The body-read loop is bounded by Content-Length rather than the buffer size, producing an attacker-controlled heap overflow of up to ~8 MiB -- before the HTTP basic-auth check runs. This issue has been patched in version 1.11.1.

Frequently asked questions

What is CVE-2026-49841?: FreeSWITCH is a Software Defined Telecom Stack enabling the digital transformation from proprietary telecom switches to a software implementation that runs on any commodity hardware. Prior to version 1.11.1, the mod_verto HTTP request handler allocates a fixed 2 MiB buffer for a POST application/x-www-form-urlencoded body but accepts Content-Length up to just under 10 MiB. The body-read loop is bounded by Content-Length rather than the buffer size, producing an attacker-controlled heap overflow of up to ~8 MiB -- before the HTTP basic-auth check runs. This issue has been patched in version 1.11.1.
How severe is CVE-2026-49841?: CVE-2026-49841 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2026-49841 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (31st percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-49841?: CVE-2026-49841 affects Freeswitch. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-49841?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
Does CVE-2026-49841 have an EU (EUVD) identifier?: Yes. CVE-2026-49841 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-35472.
When was CVE-2026-49841 published?: CVE-2026-49841 was published on 2026-06-09 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:freeswitch:freeswitch:*:*:*:*:*:*:*:*

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