CVE-2026-79311

UNRATEDCVSS · not yet scoredTrending — 3 sources updated this week
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EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • No CVSS published and no exploitation signals yet
CISA-KEV: Not listedEPSS PROB: 0.2%CVSS v2: —Exploit: None knownExposed services: Not assessed

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

webpy web.py 0.76 is vulnerable to Cross Site Scripting (XSS) via render_jinja.__init__().

CVSS v3
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EchelonGraph score
Not yet assessedNo source has published severity data for this CVE yet — no CVSS score from NVD or a CNA, no GitHub advisory, and it is not in CISA KEV. This is not a rating of zero; we cannot assess it yet.
EG Score
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EG Risk
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EPSS PROB
0.2%
EPSS %ILE
3rd
KEV
Not listed

Published

September 22, 2026

Last Modified

September 22, 2026

References (2)

Vendor Advisories for CVE-2026-79311(1)

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

Affected Packages

(3 across 3 ecosystems)
Debian:12(1)
PackageVulnerable rangeFix by version rangeDependents
webpy1:0.62-4 ... 1:0.76-1 (6 versions)
  • every version on: no fix on record
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Debian:13(1)
PackageVulnerable rangeFix by version rangeDependents
webpy1:0.62-6, 1:0.70-1, 1:0.76-1
  • every version on: no fix on record
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Debian:14(1)
PackageVulnerable rangeFix by version rangeDependents
webpy1:0.62-6, 1:0.70-1, 1:0.76-1
  • every version on: no fix on record
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Data Freshness Timeline

(refreshed 10× 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. 2026-10-04 23:22 UTCEPSS rescore
  2. 2026-10-04 22:00 UTCGHSA enrichment
  3. 2026-10-03 14:26 UTCEPSS rescore
  4. 2026-10-02 17:57 UTCEPSS rescore
  5. 2026-10-01 21:33 UTCEG score recompute
  6. 2026-10-01 21:33 UTCGHSA enrichment
  7. 2026-10-01 19:50 UTCEPSS rescore
  8. 2026-09-29 15:24 UTCEPSS rescore
  9. 2026-09-28 21:07 UTCGHSA enrichment
  10. 2026-09-28 13:52 UTCEPSS rescore
  11. 2026-09-27 13:48 UTCEPSS rescore
  12. 2026-09-26 15:59 UTCEPSS rescore
  13. 2026-09-26 00:28 UTCEPSS rescore
  14. 2026-09-25 20:41 UTCEG score recompute
  15. 2026-09-25 20:41 UTCGHSA enrichment
  16. 2026-09-24 14:04 UTCEPSS rescore
  17. 2026-09-23 17:54 UTCEPSS rescore
  18. 2026-09-22 20:12 UTCGHSA enrichment
  19. 2026-09-22 16:19 UTCNVD update
  20. 2026-09-22 15:30 UTCEG score recompute
  21. 2026-09-22 15:29 UTCMITRE cvelistV5first tracked

Related CVEs(same product)

Frequently asked(4)

What is CVE-2026-79311?
CVE-2026-79311 is a publicly disclosed vulnerability published on September 22, 2026. webpy web.py 0.76 is vulnerable to Cross Site Scripting (XSS) via render_jinja.init().
When was CVE-2026-79311 disclosed?
CVE-2026-79311 was first published on September 22, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-79311 actively exploited?
CVE-2026-79311 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.2% probability of exploitation in the next 30 days (3rd percentile of EPSS-scored CVEs).
How do I remediate CVE-2026-79311?
No fix for CVE-2026-79311 is confirmed yet. Until one is published, restrict network exposure of the affected system or apply the vendor's mitigation — for example, keep it off the internet or limit it to trusted networks — and watch the vendor's advisory for the fix. The vendor advisories EchelonGraph has for CVE-2026-79311 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

See which npm, PyPI, Go, and Maven packages are affected by CVE-2026-79311

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