CVE-2026-22034

CRITICALNVD 9.89.8—
EchelonGraph scoreMEDIUM confidence

This critical-severity CVE scores 9.8 under NVD CVSS v3. EPSS exploit probability: 0.1%, top 81% 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: epss, nvd
Elevated
9.8
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 1%CVSS: 9.8Exploit: NoneExposed: 0

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

Snuffleupagus is a module that raises the cost of attacks against website by killing bug classes and providing a virtual patching system. On deployments of Snuffleupagus prior to version 0.13.0 with the non-default upload validation feature enabled and configured to use one of the upstream validation scripts based on Vulcan Logic Disassembler (VLD) while the VLD extension is not available to the CLI SAPI, all files from multipart POST requests are evaluated as PHP code. The issue was fixed in version 0.13.0.

CVSS v3
9.8
EG Score
9.8(medium)
EPSS
47.6%
KEV
Not listed

Published

January 8, 2026

Last Modified

March 9, 2026

Advisory Details (8)

Auto-updated Jun 16, 2026
Patch available. Sources: github_commit, github.
generic

Configuration — Snuffleupagus stable documentation

https://snuffleupagus.readthedocs.io/config.html#upload-validation
generic

php-src/main/rfc1867.c at e4098da58a9eaee759d728d98a27d809cde37671 · php/php-src · GitHub

https://github.com/php/php-src/blob/e4098da58a9eaee759d728d98a27d809cde37671/main/rfc1867.c#L1269-L1274
generic

php-src/ext/standard/dl.c at e4098da58a9eaee759d728d98a27d809cde37671 · php/php-src · GitHub

https://github.com/php/php-src/blob/e4098da58a9eaee759d728d98a27d809cde37671/ext/standard/dl.c#L165-L166
github Patch Available

RCE on instances with upload validation enabled but without the VLD package · Advisory · jvoisin/snuffleupagus · GitHub

https://github.com/jvoisin/snuffleupagus/security/advisories/GHSA-c4ch-xw5p-2mvc
github_commit

commit 9278dc77bab2 (jvoisin/snuffleupagus)

Fix landed in jvoisin/snuffleupagus commit 9278dc77bab2 — awaiting tagged release

https://github.com/jvoisin/snuffleupagus/commit/9278dc77bab2a219e770a1b31dd6797bc9070e37
generic

snuffleupagus/scripts/upload_validation.py at v0.12.0 · jvoisin/snuffleupagus · GitHub

https://github.com/jvoisin/snuffleupagus/blob/v0.12.0/scripts/upload_validation.py
generic

snuffleupagus/scripts/upload_validation.php at v0.12.0 · jvoisin/snuffleupagus · GitHub

https://github.com/jvoisin/snuffleupagus/blob/v0.12.0/scripts/upload_validation.php
generic

snuffleupagus/src/sp_upload_validation.c at 9278dc77bab2a219e770a1b31dd6797bc9070e37 · jvoisin/snuffleupagus · GitHub

https://github.com/jvoisin/snuffleupagus/blob/9278dc77bab2a219e770a1b31dd6797bc9070e37/src/sp_upload_validation.c#L92-L100

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 12× in last 7d / 46× 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. 2026-07-22 14:08 UTCEPSS rescore
  2. 2026-07-21 15:24 UTCEPSS rescore
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  1. 2026-07-07 13:46 UTCEPSS rescore
  2. 2026-07-06 16:27 UTCEPSS rescore
  3. 2026-07-06 16:27 UTCEPSS rescore
  4. 2026-07-06 06:32 UTCOSV refresh
  5. 2026-07-06 02:23 UTCEPSS rescore
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  7. 2026-07-05 02:30 UTCEPSS rescore
  8. 2026-07-04 06:31 UTCEPSS rescore
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  10. 2026-07-01 15:06 UTCEPSS rescore
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  12. 2026-06-30 23:22 UTCEPSS rescore
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  18. 2026-06-27 03:08 UTCEPSS rescore
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  24. 2026-06-21 14:56 UTCEPSS rescore
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  26. 2026-06-21 01:59 UTCEPSS rescore
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  28. 2026-06-19 19:25 UTCEPSS rescore
  29. 2026-06-18 17:52 UTCEPSS rescore
  30. 2026-06-17 17:53 UTCEPSS rescore
  31. 2026-06-17 17:44 UTCOSV refresh
  32. 2026-06-16 17:52 UTCEPSS rescore
  33. 2026-06-15 17:48 UTCEPSS rescore
  34. 2026-06-14 23:18 UTCEPSS rescore
  35. 2026-06-13 23:00 UTCEPSS rescore
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  37. 2026-06-12 23:12 UTCEPSS rescore
  38. 2026-06-11 14:00 UTCEPSS rescore
  39. 2026-06-10 22:18 UTCEPSS rescore
  40. 2026-06-10 13:22 UTCEPSS rescore
  41. 2026-06-08 14:17 UTCEPSS rescore
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  43. 2026-06-07 15:25 UTCEPSS rescore
  44. 2026-06-07 15:24 UTCEPSS rescore
  45. 2026-06-06 13:47 UTCEPSS rescore
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  48. 2026-06-05 22:47 UTCEPSS rescore
  49. 2026-06-05 06:10 UTCEPSS rescore
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  51. 2026-06-04 13:12 UTCEPSS rescore
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  56. 2026-06-01 13:51 UTCEPSS rescore
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  64. 2026-05-29 16:28 UTCEG score recompute
  65. 2026-05-29 13:44 UTCEPSS rescore
  66. 2026-05-29 13:44 UTCEPSS rescore

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Frequently asked(5)

What is CVE-2026-22034?
CVE-2026-22034 is a critical vulnerability published on January 8, 2026. Snuffleupagus is a module that raises the cost of attacks against website by killing bug classes and providing a virtual patching system. On deployments of Snuffleupagus prior to version 0.13.0 with the non-default upload validation feature enabled and configured to use one of the upstream…
When was CVE-2026-22034 disclosed?
CVE-2026-22034 was first published in the National Vulnerability Database on January 8, 2026, with the most recent update on March 9, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-22034 actively exploited?
CVE-2026-22034 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 47.6% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-22034?
CVE-2026-22034 has a CVSS v3 base score of 9.8 (NVD).
How do I remediate CVE-2026-22034?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-22034, 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.

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