CVE-2026-50722

HIGHPre-NVD 8.18.1—
EchelonGraph scoreHIGH confidence

Score 8.1 from GitHub Security Advisory (severity: HIGH) published 2026-07-03. a secondary CVSS source baseline 8.1; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 4 sources updated this week
8.1
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 0%CVSS: 8.1Exploit: NoneExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

Libreswan, via the function RSA_authenticate_hash_signature_pkcs1_1_5_rsa(), did not correctly verify the DER encoding of the ASN.1 digest when the IKEv2 AUTH payload was encoded using RSASSA-PKCS1-v1_5 (RFC 8017). A remote attacker can use a variation on the Bleichenbacher attack to forge the AUTH payload when small public exponents are used (e.g., e=3), leading to impersonation. Additionally, a remote attacker, by encoding a shorter than expected hash in the AUTH payload, could trigger an assertion leading to denial-of-service. The daemon aborts and restarts; continued exploitation causes sustained denial of service. Remote code execution is not possible. X.509 certificate verifications of the remote IKE peer are not affected.

CVSS v3
8.1
EG Score
8.1(high)
EPSS
24.9%
KEV
Not listed

Published

July 2, 2026

Last Modified

July 6, 2026

Advisory Details (4)

Auto-updated Jul 3, 2026
No patch confirmed yet.
generic

RFC 8017: PKCS #1: RSA Cryptography Specifications Version 2.2 | RFC Editor

https://www.rfc-editor.org/rfc/rfc8017
generic
https://libreswan.org/security/CVE-2026-50722/CVE-2026-50722.txt
generic

Index of /security/CVE-2026-50722/

https://libreswan.org/security/CVE-2026-50722/
generic
https://libreswan.org/security/CVE-2026-50721/CVE-2026-50721.txt

Vendor Advisories for CVE-2026-50722(1)

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

Weakness Classification(2)

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

Data Freshness Timeline

(refreshed 21× in last 7d / 21× 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.

  1. 2026-07-07 03:47 UTCEG score recompute
  2. 2026-07-07 03:46 UTCGHSA enrichment
  3. 2026-07-06 16:27 UTCEPSS rescore
  4. 2026-07-06 15:18 UTCEG score recompute
  5. 2026-07-06 15:18 UTCGHSA enrichment
  6. 2026-07-06 02:48 UTCEG score recompute
  7. 2026-07-06 02:48 UTCGHSA enrichment
  8. 2026-07-06 02:23 UTCEPSS rescore
  9. 2026-07-05 14:22 UTCEG score recompute
  10. 2026-07-05 14:22 UTCGHSA enrichment
  11. 2026-07-05 02:30 UTCEPSS rescore
  12. 2026-07-05 01:55 UTCEG score recompute
  13. 2026-07-05 01:55 UTCGHSA enrichment
  14. 2026-07-04 13:28 UTCEG score recompute
  15. 2026-07-04 13:28 UTCGHSA enrichment
  16. 2026-07-04 01:01 UTCEG score recompute
  17. 2026-07-04 01:01 UTCGHSA enrichment
  18. 2026-07-03 12:35 UTCEG score recompute
  19. 2026-07-03 12:35 UTCGHSA enrichment
  20. 2026-07-03 00:06 UTCEG score recompute
  21. 2026-07-03 00:06 UTCNVD updatefirst tracked

Frequently asked(5)

What is CVE-2026-50722?
CVE-2026-50722 is a high vulnerability published on July 2, 2026. Libreswan, via the function RSAauthenticatehashsignaturepkcs115rsa(), did not correctly verify the DER encoding of the ASN.1 digest when the IKEv2 AUTH payload was encoded using RSASSA-PKCS1-v15 (RFC 8017). A remote attacker can use a variation on the Bleichenbacher attack to forge the AUTH payload…
When was CVE-2026-50722 disclosed?
CVE-2026-50722 was first published in the National Vulnerability Database on July 2, 2026, with the most recent update on July 6, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-50722 actively exploited?
CVE-2026-50722 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 24.9% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-50722?
CVE-2026-50722 has a CVSS v3 base score of 8.1 (NVD).
How do I remediate CVE-2026-50722?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-50722, 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

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