CVE Intelligence
Critical

CVE-2026-115931 — Arbitrary file read and backend crash through unrestricted provider method calls

Postiz lets a signed-in user ask the backend to run a function on one of their connected channels. The backend did not restrict which functions can be requested, so a user could call internal helper functions that were never meant to be reachable from the web interface. One of those helpers reads a file from the server's disk. A user who connects a channel whose stored token is a file path can have the backend return the contents of any file it can read, including its environment, which holds the secret used to sign login sessions, the database address and the credentials of connected services. Another helper makes the backend process exit with a single request. Self-registration is open by default, so no existing account and no action by another user is needed.

Published Oct 23, 2026 · Updated Oct 26, 2026 · Sources: CVE Program (cve.org) e CISA ADP, NIST National Vulnerability Database, GitHub Security Advisories · CNA: postiz

Who exploits it and how urgent it is

A 0–100 score combining confirmed exploitation, ransomware and APT use, public exploits, EPSS and severity.

No exploitation signal in the sources consulted so far.
How the score was calculated
  • EPSS 0.5% (30-day exploitation probability)+6
  • Technical severity (critical)+10

The score orders the patch queue; it does not replace your asset context (internet exposure, criticality, compensating controls).

Triage

Is it exploited, how likely is exploitation, what does it touch, and how severe do the sources call it.

Exploitation
Not confirmed
Not in CISA KEV — an absence of record, not proof it is unexploited.
EPSS FIRST
0.49%
ahead of 42% of scored CVEs · Oct 29, 2026
Affects
Gitroomhq
Postiz-app
CVSS base
9.9
Critical · 3 source(s)

Remediation

Fixes and mitigations documented by the sources — linked to the original advisory.

No fix documented by the sources we poll. That does not mean none exists: check the vendor advisory.

First 24 hours

Ordered from the record’s own fields — exposure first, because you cannot patch what you have not found. A rule-generated starting point.

  1. Identify exposed assets running the affected vendor/product/version combinations (Gitroomhq Postiz-app).
  2. No fix documented in the sources: reduce exposure and monitor the vendor advisory.
  3. Search available logs for exploit probes, errors and authentication anomalies.

Affected scope

Vendor, product and versions as the sources word them.

VendorProductVersionsStatusSource
Gitroomhq Postiz-app ≥ 2.23.0 and < 2.25.2 Vulnerable CVE Program (cve.org) e CISA ADP

Attack characteristics

The CVSS vector, decoded. It describes the attack, not your exposure to it.

Attack vector
Network
Attack complexity
Low
Privileges required
Low
User interaction
None
Scope
Changed
Confidentiality
High
Integrity
High
Availability
High

Every base score collected

Sources score independently and may disagree; each row says who scored it and under which version.

ScoreVersionSeverityExpl.ImpactScored by
9.9 CVSS 3.1 Critical 3.1 6.0 4cdc9741-f887-419a-a2fd-acbbd2729276 via NIST National Vulnerability Database
9.9 CVSS 3.1 Critical — — GitHub, Inc. via GitHub Security Advisories
9.9 CVSS 3.1 Critical — — postiz via CVE Program (cve.org) e CISA ADP
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H (score shown at the top: 4cdc9741-f887-419a-a2fd-acbbd2729276)

Weakness MITRE

Weakness class according to MITRE’s CWE catalog.

CWE-73

Other CVEs with this weakness →

EPSS over time FIRST

Oct 24, 2026 → Oct 29, 2026 · 6 reading(s) · max 0.65%

Detection

Read off the CVSS vector and the weakness class. Starting points, not tested rules.

  • Prioritize edge telemetry for the network-reachable component (proxy, WAF, IDS/IPS).
web/proxy/WAF logsnetwork IDS/IPS

Timeline

What happened to this CVE, newest first.

  • 2026
  • Source status changed · Received → Deferred
    Oct 26, 2026 · NIST National Vulnerability Database
  • Source status changed · Published → Received
    Oct 23, 2026 · NIST National Vulnerability Database
  • Record published
    Oct 23, 2026
  • CVSS changed · 9.9
    Oct 23, 2026 · CVE Program (cve.org) e CISA ADP
  • Source status changed · → Published
    Oct 23, 2026 · CVE Program (cve.org) e CISA ADP
  • Record created in this database
    Oct 23, 2026 · CVE Program (cve.org) e CISA ADP
  • CVE published
    Oct 23, 2026 · postiz

Source activity

Repeated readings are counted rather than listed.

  • 2× References added · Oct 24, 2026 – Oct 26, 2026
  • 1× Official description updated · Oct 23, 2026 – Oct 23, 2026

References

7 on the record

Elsewhere on this site

Gitroomhq
every CVE for this vendor
CWE-73
other pages naming this weakness

Related CVEs (same products)

  • CVE-2026-115933 Forged signed tokens let any registered user take over other users and organizations 5d
  • CVE-2026-115932 Path traversal in post media lets any registered user read server files 5d
  • CVE-2026-107761 Channel tokens and organization API key exposed in API responses 18d
  • CVE-2026-94456 Unauthenticated recovery of the Math.random() state behind OAuth tokens, authorization codes, client secrets and organization API keys Sep 22, 2026
  • CVE-2026-94455 Unauthenticated /enterprise/create-user mints lifetime top-tier organizations and discloses their API key Sep 22, 2026
  • CVE-2026-19264 Unauthenticated arbitrary file read via /uploads path traversal (URL-encoded separators) leading to instance takeover Aug 7, 2026

Not in any source we poll

Listed rather than left blank: an empty field and an unmeasured one look identical on screen, and only one is a reason to look elsewhere.

  • No fixed version, patch or mitigation documented.
  • No CISA SSVC assessment.
  • No confirmed IOCs, IP addresses, domains, file hashes, or malware artifacts supplied.
  • No organization-specific asset inventory, compensating-control status, or patch deployment evidence supplied.
  • No exploit packet captures, log samples, or incident case IDs supplied.

Answered from this record

Text assembled only from the fields above — no additional claims.

What should defenders know first?

CVE-2026-115931 is "Arbitrary file read and backend crash through unrestricted provider method calls", rated Critical. It affects Postiz-app (Gitroomhq); versions are in the scope table. It is not in CISA KEV, which does not rule out exploitation. CVSS 9.9 describes technical severity. EPSS 0.49% estimates the probability of exploitation in 30 days; neither replaces your asset context. First verify whether exposed or business-critical assets run the affected versions, apply vendor fixes or mitigations, and preserve logs for review.

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