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Exploitation reportedNot in CISA KEV yetFix available

CVE-2026-77806

Exploitation reported by one source. First attested on 2026-08-21 by GCVE · kevintel.

  • Published2026-08-21
  • WeaknessCWE-94

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

Description

SPIP before 4.4.21 allows unauthenticated remote attackers to execute arbitrary code, as exploited in the wild in August 2026. This is related to code injection via an X-Spip-Filtre HTTP request header that is mishandled by analyse_resultat_skel.

Timeline

dates in UTC
  1. 2026-08-2113:50Listed as exploited by GCVEGCVE
  2. 2026-08-2113:50Exploitation first reportedGCVE
  3. 2026-08-2114:16CVE publishedNVD

Versions per branch

Products declared by the CNA1 product

As mitre, the CNA that assigned this CVE, declared them in the CVE record; versions as written.

  • SPIPother versions: not affected
    Affected
    • < 4.4.21fixed in 4.4.21semver

Source: the CNA record (CVE Program), © The MITRE Corporation,CVE Terms of UseCVE recordupdated 2026-08-21

Distribution builds and vendor advisories

Packages from OSV.dev and products from the vendors' CSAF advisories.

version not verifiedVersions not verified: read as OSV.dev and the vendors publish them, not checked against each vendor's release list.

Packages

  • spipUbuntu:Pro:20.04:LTSall versions · no fixed version listed
  • spipUbuntu:Pro:18.04:LTSall versions · no fixed version listed
  • spipUbuntu:Pro:16.04:LTSall versions · no fixed version listed
  • spipUbuntu:26.04:LTSall versions · no fixed version listed
  • spipUbuntu:24.04:LTSall versions · no fixed version listed
  • spipUbuntu:22.04:LTSall versions · no fixed version listed
  • spipDebian:14all versions · fixed in 4.4.21+dfsg-1
  • spipDebian:13all versions · fixed in 4.4.21+dfsg-0+deb13u1

Full record on NVD

Fix

No fix published by the sources we read yet. NVD record

Detection

read 2026-11-01 01:02 UTC
Nuclei template
available
ProjectDiscovery
Exploit-DB
no entry
Exploit-DB
Proof of concept
Metasploit modules
none listed
Metasploit Framework

Sources

Identifiers

Technical details

CVSS v3 Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Published
2026-08-21
Last Modified
2026-10-15
NVD status
Deferred
GitHub Advisory
GHSA-vgr8-rqwx-wqrp

Frequently asked questions

What is CVE-2026-77806?

SPIP before 4.4.21 allows unauthenticated remote attackers to execute arbitrary code, as exploited in the wild in August 2026. This is related to code injection via an X-Spip-Filtre HTTP request header that is mishandled by analyse_resultat_skel.

Is CVE-2026-77806 actively exploited?

Active exploitation of CVE-2026-77806 has not been confirmed. Its EPSS score was 4.5% on 2026-11-08, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2026-77806?

CVE-2026-77806 has a CVSS v3 base score of 9.8 (CRITICAL severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

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Same product first, then the same vendor advisory and the same publication week.

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Sources for this record