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Exploitation reportedNot in CISA KEV yetFix available

CVE-2026-77647

Exploitation reported by one source. First attested on 2026-08-20 by GCVE · kevintel.

  • Published2026-08-20
  • 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 4.4.20 allows unauthenticated remote attackers to execute arbitrary code, as exploited in the wild in August 2026. This is related to incorrect identification of <?php blocks, and var_export's mishandling of certain cases such as presence of a '<' character.

Timeline

dates in UTC
  1. 2026-08-2022:40Listed as exploited by GCVEGCVE
  2. 2026-08-2022:40Exploitation first reportedGCVE
  3. 2026-08-2023:16CVE publishedNVD
  4. 2026-10-2800:44First public proof of conceptPoC-in-GitHub

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
    • < 4.4.20fixed in 4.4.20semver

Source: the CNA record (CVE Program), © The MITRE Corporation,CVE Terms of UseCVE recordupdated 2026-08-20

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 4.4.20+dfsg-1
  • spipDebian:13all versions · fixed in 4.4.20+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
none so far
ProjectDiscovery
Exploit-DB
no entry
Exploit-DB
Proof of concept
Metasploit modules
1 moduleexploit/multi/http/spip_x_spip_filtre_rcerank: excellentModule metadata: Metasploit Framework, © Rapid7, Inc., BSD-3-Clause.
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
2026-08-20
Last Modified
2026-10-26
NVD status
Deferred
GitHub Advisory
GHSA-wj6g-rh9q-6vvm

Frequently asked questions

What is CVE-2026-77647?

SPIP before 4.4.20 allows unauthenticated remote attackers to execute arbitrary code, as exploited in the wild in August 2026. This is related to incorrect identification of <?php blocks, and var_export's mishandling of certain cases such as presence of a '<' character.

Is CVE-2026-77647 actively exploited?

Active exploitation of CVE-2026-77647 has not been confirmed. Its EPSS score was 2.3% on 2026-11-09, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2026-77647?

CVE-2026-77647 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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Sources for this record