CVE-2026-80179

MEDIUMPre-NVD 5.95.9—
EchelonGraph scoreMEDIUM confidence

This medium-severity CVE scores 5.9 under the CNA's CVSS (NVD's own analysis pending). EPSS exploit probability: 0.3%, top 83% of all CVEs by exploit prediction. GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).

Triggered by: NVD CVSS baseline
Sources: cna:redhat, epss
Elevated
5.9EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 5.9Exploit: Elevated riskExposed: 0

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

A flaw was found in jwcrypto. A remote attacker can send a specially crafted JSON Web Encryption (JWE) token containing numerous period delimiters. This malformed token can force the JWE.deserialize() function to allocate excessive memory, leading to a MemoryError. This issue results in a denial of service (DoS) for services that process untrusted JWE values.

CVSS v3
5.9
EG Score
5.9(medium)
EG Risk
43(Track)
EG Risk 43/100SSVC: 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
Severity59% × 45%
Exploitation40% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
17%
KEV
Not listed

Published

August 27, 2026

Last Modified

September 9, 2026

Advisory Details (3)

Auto-updated Aug 27, 2026
Patch available. Sources: redhat, github.
github Patch Available

jwcrypto exhausts memory on compact JWE inputs with many period delimiters · Advisory · latchset/jwcrypto · GitHub

https://github.com/latchset/jwcrypto/security/advisories/GHSA-96rv-c4vc-h4f4
redhat

2524147 – (CVE-2026-80179) CVE-2026-80179 jwcrypto: jwcrypto: Denial of Service via malformed JWE tokens

https://bugzilla.redhat.com/show_bug.cgi?id=2524147
redhat Patch Available

CVE-2026-80179 - Red Hat Customer Portal

Affected: Red Hat Enterprise Linux 8 or OpenShift Container Platform 4, is affected by this vulnerability and a fix may be released to a

https://access.redhat.com/security/cve/CVE-2026-80179

Affected Packages

(3 across 3 ecosystems)
Debian:12(1)
PackageVulnerable rangeFixed inDependents
python-jwcrypto1.1.0-1 ... 1.5.6-1.2 (7 versions)——
Debian:13(1)
PackageVulnerable rangeFixed inDependents
python-jwcrypto1.5.6-1, 1.5.6-1.1, 1.5.6-1.1~deb13u1, 1.5.6-1.2——
Debian:14(1)
PackageVulnerable rangeFixed inDependents
python-jwcrypto1.5.6-1, 1.5.6-1.1, 1.5.6-1.1~deb13u1, 1.5.6-1.2——

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 13× in last 7d / 44× 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. 2026-09-20 20:16 UTCEPSS rescore
  2. 2026-09-20 08:18 UTCEG score recompute
  3. 2026-09-19 07:46 UTCEG score recompute
  4. 2026-09-18 19:28 UTCEPSS rescore
  5. 2026-09-18 08:44 UTCEG score recompute
  6. 2026-09-17 09:44 UTCEG score recompute
  7. 2026-09-16 14:08 UTCEPSS rescore
  8. 2026-09-16 10:45 UTCEG score recompute
  9. 2026-09-16 05:15 UTCEPSS rescore
  10. 2026-09-15 11:40 UTCEG score recompute
  11. 2026-09-15 03:12 UTCEPSS rescore
  12. 2026-09-15 03:12 UTCEPSS rescore
  13. 2026-09-14 12:40 UTCEG score recompute
  14. 2026-09-13 13:26 UTCEG score recompute
  15. 2026-09-11 15:27 UTCEG score recompute
  16. 2026-09-11 14:53 UTCEPSS rescore
  17. 2026-09-11 14:53 UTCEPSS rescore
  18. 2026-09-10 16:27 UTCEG score recompute
  19. 2026-09-09 17:20 UTCEG score recompute
  20. 2026-09-09 00:37 UTCEG score recompute
  21. 2026-09-08 22:01 UTCEPSS rescore
  22. 2026-09-06 16:43 UTCEG score recompute
  23. 2026-09-06 13:48 UTCEPSS rescore
  24. 2026-09-05 17:43 UTCEG score recompute
  25. 2026-09-05 15:31 UTCEPSS rescore
Show 19 more
  1. 2026-09-04 18:44 UTCEG score recompute
  2. 2026-09-02 20:27 UTCEG score recompute
  3. 2026-09-02 14:12 UTCEPSS rescore
  4. 2026-09-01 20:22 UTCEG score recompute
  5. 2026-09-01 13:54 UTCEPSS rescore
  6. 2026-09-01 04:40 UTCEPSS rescore
  7. 2026-09-01 04:40 UTCEPSS rescore
  8. 2026-08-31 21:22 UTCEG score recompute
  9. 2026-08-31 20:55 UTCEG score recompute
  10. 2026-08-31 17:41 UTCEG score recompute
  11. 2026-08-30 19:18 UTCEPSS rescore
  12. 2026-08-30 19:17 UTCEPSS rescore
  13. 2026-08-30 18:39 UTCEG score recompute
  14. 2026-08-30 01:22 UTCEPSS rescore
  15. 2026-08-29 19:39 UTCEG score recompute
  16. 2026-08-28 21:42 UTCEPSS rescore
  17. 2026-08-28 00:31 UTCEG score recompute
  18. 2026-08-27 23:23 UTCEG score recompute
  19. 2026-08-27 23:23 UTCMITRE cvelistV5first tracked

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-80179?
CVE-2026-80179 is a medium vulnerability published on August 27, 2026. A flaw was found in jwcrypto. A remote attacker can send a specially crafted JSON Web Encryption (JWE) token containing numerous period delimiters. This malformed token can force the JWE.deserialize() function to allocate excessive memory, leading to a MemoryError. This issue results in a denial of…
When was CVE-2026-80179 disclosed?
CVE-2026-80179 was first published in the National Vulnerability Database on August 27, 2026, with the most recent update on September 9, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-80179 actively exploited?
CVE-2026-80179 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0% probability of exploitation in the next 30 days, which ranks it in the top 83.2% of all scored CVEs.
What is the CVSS score of CVE-2026-80179?
CVE-2026-80179 has a CVSS v4.0 base score of 5.9 (CNA self-assessment; NVD's own analysis pending).
How do I remediate CVE-2026-80179?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-80179, 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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