CVE-2019-17498

HIGHNVD 8.18.1—
EchelonGraph scoreMEDIUM confidence

Score 8.1 from GitHub Security Advisory published 2022-05-24. NVD baseline CVSS 8.1; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
8.1EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 4%CVSS: 8.1Exploit: None knownExposed: 0

A fix is available — apply it.

In libssh2 v1.9.0 and earlier versions, the SSH_MSG_DISCONNECT logic in packet.c has an integer overflow in a bounds check, enabling an attacker to specify an arbitrary (out-of-bounds) offset for a subsequent memory read. A crafted SSH server may be able to disclose sensitive information or cause a denial of service condition on the client system when a user connects to the server.

CVSS v3
8.1
EG Score
8.1(medium)
EG Risk
42(Track)
EG Risk 42/100SSVC: Track

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity81% × 45%
Exploitation4% × 40%
Automatability30% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
4%
EPSS %ILE
90%
KEV
Not listed

Published

October 21, 2019

Last Modified

November 21, 2024

Advisory Details (6)

Auto-updated Sep 11, 2026
Patch available. Sources: github_commit.
generic

[SECURITY] Fedora 30 Update: libssh2-1.9.0-3.fc30 - package-announce - Fedora mailing-lists

https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/22H4Q5XMGS3QNSA7OCL3U7UQZ4NXMR5O/
generic Patch Available

[SECURITY] [DLA 3559-1] libssh2 security update

https://lists.debian.org/debian-lts-announce/2023/09/msg00006.html
generic Patch Available

[SECURITY] [DLA 2848-1] libssh2 security update

https://lists.debian.org/debian-lts-announce/2021/12/msg00013.html
generic Patch Available

[SECURITY] [DLA 1991-1] libssh2 security update

https://lists.debian.org/debian-lts-announce/2019/11/msg00010.html
github_commit Patch Available

commit dedcbd106f8e (libssh2/libssh2)

Patch available: libssh2/libssh2 libssh2-1.10.0 (contains commit dedcbd106f8e)

https://github.com/libssh2/libssh2/commit/dedcbd106f8e52d5586b0205bc7677e4c9868f9c
generic

libssh2/src/packet.c at 42d37aa63129a1b2644bf6495198923534322d64 · libssh2/libssh2 · GitHub

https://github.com/libssh2/libssh2/blob/42d37aa63129a1b2644bf6495198923534322d64/src/packet.c#L480

Vendor Advisories for CVE-2019-17498(2)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Patch Availability(3)

Vendor / EcosystemFixed in / PatchReleasedSource
ubuntulibssh2-1 (1.5.0-2ubuntu0.1+esm1) @ xenial2026-05-27ubuntu
redhatopenshiftdo/odo-init-image-rhel7:1.1.3-22021-03-22redhat
redhatlibssh2-0:1.8.0-4.el72020-09-29redhat

Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.

Affected Packages

(23 across 23 ecosystems)
Alpine:v3.10(1)
PackageVulnerable rangeFixed inDependents
libssh2—1.9.0-r1—
Alpine:v3.11(1)
PackageVulnerable rangeFixed inDependents
libssh2—1.9.0-r1—
Alpine:v3.12(1)
PackageVulnerable rangeFixed inDependents
libssh2—1.9.0-r1—
Alpine:v3.13(1)
PackageVulnerable rangeFixed inDependents
libssh2—1.9.0-r1—
Alpine:v3.14(1)
PackageVulnerable rangeFixed inDependents
libssh2—1.9.0-r1—
Alpine:v3.15(1)
PackageVulnerable rangeFixed inDependents
libssh2—1.9.0-r1—
Alpine:v3.16(1)
PackageVulnerable rangeFixed inDependents
libssh2—1.9.0-r1—
Alpine:v3.17(1)
PackageVulnerable rangeFixed inDependents
libssh2—1.9.0-r1—
Alpine:v3.18(1)
PackageVulnerable rangeFixed inDependents
libssh2—1.9.0-r1—
Alpine:v3.19(1)
PackageVulnerable rangeFixed inDependents
libssh2—1.9.0-r1—
Alpine:v3.20(1)
PackageVulnerable rangeFixed inDependents
libssh2—1.9.0-r1—
Alpine:v3.21(1)
PackageVulnerable rangeFixed inDependents
libssh2—1.9.0-r1—
Alpine:v3.22(1)
PackageVulnerable rangeFixed inDependents
libssh2—1.9.0-r1—
Alpine:v3.23(1)
PackageVulnerable rangeFixed inDependents
libssh2—1.9.0-r1—
Alpine:v3.24(1)
PackageVulnerable rangeFixed inDependents
libssh2—1.9.0-r1—
Alpine:v3.9(1)
PackageVulnerable rangeFixed inDependents
libssh2—1.9.0-r1—
Debian:10(1)
PackageVulnerable rangeFixed inDependents
libssh21.8.0-2.11.8.0-2.1+deb10u1—
Debian:11(1)
PackageVulnerable rangeFixed inDependents
libssh2—1.9.0-1—
Debian:12(1)
PackageVulnerable rangeFixed inDependents
libssh2—1.9.0-1—
Debian:13(1)
PackageVulnerable rangeFixed inDependents
libssh2—1.9.0-1—
Debian:14(1)
PackageVulnerable rangeFixed inDependents
libssh2—1.9.0-1—
Debian:8(1)
PackageVulnerable rangeFixed inDependents
libssh21.4.3-4.1 ... 1.4.3-4.1+deb8u5 (6 versions)1.4.3-4.1+deb8u6—
Debian:9(1)
PackageVulnerable rangeFixed inDependents
libssh21.7.0-1, 1.7.0-1+deb9u11.7.0-1+deb9u2—

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Additional Vendor Advisories

(2)

Vendors that published advisories for this CVE beyond the curated set above. Broader coverage but minimal per-row detail — click through for the original advisory.

Data Freshness Timeline

(refreshed 5× in last 7d / 25× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

Showing the most recent 100 of 144 total refreshes for this CVE.

  1. 2026-09-18 19:22 UTCEPSS rescore
  2. 2026-09-17 19:22 UTCEPSS rescore
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  24. 2026-08-21 12:14 UTCOSV refresh
  25. 2026-08-20 22:51 UTCEPSS rescore
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  1. 2026-08-19 17:00 UTCEPSS rescore
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  11. 2026-08-06 13:43 UTCEPSS rescore
  12. 2026-08-05 23:51 UTCOSV refresh
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  25. 2026-07-23 01:42 UTCEG score recompute
  26. 2026-07-22 22:22 UTCEG score recompute
  27. 2026-07-22 14:05 UTCEPSS rescore
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  32. 2026-07-20 03:16 UTCOSV refresh
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Frequently asked(5)

What is CVE-2019-17498?
CVE-2019-17498 is a high vulnerability published on October 21, 2019. In libssh2 v1.9.0 and earlier versions, the SSHMSGDISCONNECT logic in packet.c has an integer overflow in a bounds check, enabling an attacker to specify an arbitrary (out-of-bounds) offset for a subsequent memory read. A crafted SSH server may be able to disclose sensitive information or cause a…
When was CVE-2019-17498 disclosed?
CVE-2019-17498 was first published in the National Vulnerability Database on October 21, 2019, with the most recent update on November 21, 2024. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2019-17498 actively exploited?
CVE-2019-17498 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 4% probability of exploitation in the next 30 days, which ranks it in the top 10.5% of all scored CVEs.
What is the CVSS score of CVE-2019-17498?
CVE-2019-17498 has a CVSS v3 base score of 8.1 (NVD).
How do I remediate CVE-2019-17498?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2019-17498, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

See which npm, PyPI, Go, and Maven packages are affected by CVE-2019-17498

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