918
CWE-918 is server-side request forgery.
- Even
- Composite
Where 918 fits
Why 918 is special
It became a headline weakness through cloud metadata services, where a server tricked into fetching an internal address returns credentials for the whole account.
Factors & digit properties
- Divisors (16)
- 1, 2, 3, 6, 9, 17, 18, 27, 34, 51, 54, 102, 153, 306, 459, 918
- Prime factorisation
- 2 × 3^3 × 17
- Digit sum
- 18
- Digital root
- 9
Representations
- Decimal
- 918
- Scientific notation
- 9.180 × 10^2
Roman numerals
C M X V I I I
CMXVIII uses the subtractive pair CM: a hundred before a thousand — a thousand minus a hundred.
Binary
1 1 1 0 0 1 0 1 1 0
1 × 512 + 1 × 256 + 1 × 128 + 0 × 64 + 0 × 32 + 1 × 16 + 0 × 8 + 1 × 4 + 1 × 2 + 0 × 1 = 918
Octal
1 6 2 6
1 × 512 + 6 × 64 + 2 × 8 + 6 × 1 = 918
Hexadecimal
3 9 6
3 × 256 + 9 × 16 + 6 × 1 = 918
Read as powers of two: 512 + 256 + 128 + 16 + 4 + 2 = 918.
In historical numeral systems
Egyptian
9 coils of rope, 1 hobble, 8 strokes
9 × 100 + 1 × 10 + 8 × 1 = 918. The signs are simply repeated and added; where they sit on the line is a matter of layout, not value.
Babylonian
1 corner wedge + 5 vertical wedges (sixties place), 1 corner wedge + 8 vertical wedges (units place)
15 × 60 + 18 = 918. Places are separated by a space on the tablet, with the higher place written first.
Greek (Ionic)
sampi, then iota, then eta, marked as a numeral
sampi-iota-eta + keraia
sampi + iota + eta written in descending order and added — the letters carry their values wherever they stand, so this is addition, not place value.
Hebrew numerals
tav, then tav, then qof, then yod, then het
tav-tav-qof-yod-het
tav (400) + tav (400) + qof (100) + yod (10) + het (8) = 918, written in descending order.
Systems that simply cannot reach this value are left out. Where a script needs a font most readers do not have, the reading is given instead of the glyphs — see number systems for each system in full.
Other mathematical patterns
- Abundant number
- Harshad (Niven) number
Related numbers & connections
Server-side request forgery against cloud metadata endpoints turns a fetch into disclosure of account credentials.
View 200 →Technology & computing
CWE-918 covers a server retrieving a resource from a URL under attacker influence. Cloud instance metadata endpoints made the impact severe, since they return short-lived credentials to any local requester.
DocumentedTechnology & computingGeography: International — MITRE CWEPeriod: 2006–
Common questions
Is 918 a prime number?
No, 918 is not prime.
What are the factors of 918?
The factors of 918 are 1, 2, 3, 6, 9, 17, 18, 27, 34, 51, 54, 102, 153, 306, 459, 918.
What is 918 in Roman numerals?
918 in Roman numerals is CMXVIII. CM is subtractive: a hundred before a thousand — a thousand minus a hundred. Written additively it would be DCCCCXVIII, which Roman inscriptions used freely — the strict subtractive form is a later convention.
About this page's data
Mathematical facts:computed directly from the number's value — nothing to source or verify externally.
Contextual records: 1 reviewer-confirmed record, sourced and reviewed before publication.
Last reviewed: 15 July 2026