No exploitation reportedFix available

CVE-2022-26498

Q: Is CVE-2022-26498 actively exploited?

Active exploitation of CVE-2022-26498 has not been confirmed. Its EPSS score was 16.5% on 2026-10-22, the estimated probability of exploitation in the next 30 days.

Q: What is the CVSS score for CVE-2022-26498?

CVE-2022-26498 has a CVSS v3 base score of 7.5 (HIGH severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

No exploitation reported by the sources we read.

Published2022-04-15
Fixed in18.11.2
WeaknessCWE-400

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

Description

An issue was discovered in Asterisk through 19.x. When using STIR/SHAKEN, it is possible to download files that are not certificates. These files could be much larger than what one would expect to download, leading to Resource Exhaustion. This is fixed in 16.25.2, 18.11.2, and 19.3.2.

Timeline

dates in UTC

2022-04-1505:15CVE publishedNVD
2026-10-2319:23EPSS crossed 10 %FIRST EPSS

Observed activity

isMalicious corpus · updated 2026-10-23 18:48 UTC

Indicators tagged with this CVE, per day0 indicators over 7 days

Block these indicators

Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2022-26498?format=txt
CSV export: https://api.ismalicious.com/edl/cve/CVE-2022-26498?format=csv
TAXII collection of exploited CVEs
The EDL and CSV take an API key on the Pro plan.

Versions per branch

NVD

Digium asterisk

Branch	Affected	Fixed in	Source
18.x	≥ 18.0, < 18.11.2	18.11.2	NVD
16.x	≥ 16.15.0, ≤ 16.25.1	no fix published	NVD
19.x	≥ 19.0.0, ≤ 19.3.1	no fix published	NVD

Debian debian linux

Branch	Affected	Fixed in	Source
10.0	= 10.0	no fix published	NVD
11.0	= 11.0	no fix published	NVD

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Fix

Update Digium asterisk to 18.11.2

Advisories and patches

packetstormsecurity.comPatch
downloads.asterisk.orgVendor Advisory
downloads.asterisk.orgPatch · Vendor Advisory

Detection

Nuclei template: none so far
Exploit-DB: no entry
Proof-of-concept repositories: none listed

Sources

NVDCVSS 3.17.5read 2026-10-23
NVDCVSS 2.05read 2026-10-23
NVDweakness (CWE)CWE-400read 2026-10-23
FIRST EPSSEPSS score16.5 %read 2026-10-23

Technical details

CVSS v3 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Published: 2022-04-15
Last Modified: 2026-06-17
NVD status: Modified

Frequently asked questions

What is CVE-2022-26498?

Is CVE-2022-26498 actively exploited?

Active exploitation of CVE-2022-26498 has not been confirmed. Its EPSS score was 16.5% on 2026-10-22, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2022-26498?

CVE-2022-26498 has a CVSS v3 base score of 7.5 (HIGH severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

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